BMW M5 M6 S85 V10 Total Engine Teardown! Preventative Maintenance Is ALWAYS Cheaper!

For part inquiries, visit www.Importapart.com and if you don't see what you're after, fill out the part request form! You can also email us at
[e-mail].
Today's teardown has been requested since the VERY beginning but these can be tough cores to find. I sold my GOOD V10 from my 2006 M5 parts car and I was able to get the customers old core back!
My name is Eric and I own and run a full service auto salvage facility in hazelwood MO. Part of our model is selling parts from blown up or bad engines. All of the parts from the engines I tear down on this channel are thoroughly cleaned, inspected and resold when usable.
BMW's S85 V10 is the most powerful naturally aspirated BMW engine ever, making over 500hp! This comes as a cost as these can be extremely expensive to maintain properly. They are MORE expensive to neglect.
This core tells a story of lack of maintenance, perhaps the dirtiest and neglected S85 I've seen yet though I haven't had too many come through the shop.
As always, I appreciate all of the comments, feedback and even the criticism.
Catch you on the next one!
-Eric

[@EATSLEEPDRIVE2002]

Every time I hear you say “wow, this part is in really good shape“, I eagerly wait to hear or see it being thrown across the shop😂😂

[@Cynsham]

"This has a shape that looks like a.... fluid... passage.."

[@mphilleo]

We have reached peak perfect parts rejection and I love it. 😗👍

[@Nova-1977]

Only a German car could be that hard to change a starter .I would potato chip it first .

[@SilasHumphreys]

I saw the shaft on it and was just instantly "Why, BMW, why would you do that?" Seeing it yote across the yard was glorious vindication.

[@sc5015]

Whomever the automotive engineer that decided a plastic water pump vane was a good idea should have all the failed ones yeeted at their head just like how Eric yeeted that one out the back door.

[@midwestfarm757]

My 6 year old son watches all your videos before bed and all morning before school and wants to visit the shop someday. I just bought him a 351C and he’s tearing it down. He knows what every component is inside the engine thanks to you!

[@jeffeurobikenut7378]

Thats very cool! I too somehow knew what all the parts were and their function at 8-9 years old. It's very interesting that he has gravitated to seeing engines torn down. Future mechanic, mechanical engineer!

[@MeaHeaR]

ore he mite be turn into Murrikân mecanick skotty killmoore torque abbout 😟😟😰😩😰😩😩😩😩😧😦😥😧😳😵😶😵

[@jesusyeshuaelelyonelshadai6295]

Lol that's cool support him in his passion he will be great one day top notch

[@alexz9947]

Future mechanical engineer in the making! ✊ We're dwindling with the onslaught of folks using their brains less and less each day.

[@user-sf7kl9uh7k]

​@@alexz9947There is no future in automotive mechanical engineering TBH, not for a 6 year old anyway!

[@jlhaynes54]

I absolutely love my E60 M5. I daily drove it for over a year with minimal issues. I have done all of the normal maintenance and still have the car. Excellent video.

[@drewmurray2583]

One time I took apart a W12 from a Phaeton and found someone had just replaced the head gaskets. They punched a big "R" and "L" on the heads but they are clearly not interchangeable. It looked like a child had done it, they were crooked and about 1.5" x 1.5". When they put the cam gears on they must have used a hammer because the solenoid body was damaged and they broke one of the oil control rings in half on the cam. Obvious fail, the car would have never run properly after all that work which explained the flood damage insurance write off. Never insurable again, the guy ruined a car and ripped off his insurance because he made a mistake. Every engine tells you a story as you take it apart. Lol I actually got in touch with the previous owner of that car because he posted tons of stuff and pics of it on VWvortex with his vin number in the VCDS scans. He said he put 40k on it with no issues until it got flooded in Calgary. Liar haha

[@connarcomstock161]

Being on the receiving end of a non-maintained BMW is called "Pulling a Hoovie" I believe.

[@reubensandwich9249]

"I like terrible things", Thanks Eric for reminding me why I tune in every time you upload.

[@christopherweise438]

Just came here to say that. Eric thinks like i do.

[@RANDOMNATION907]

I'd love to see an Oldsmobile 5.7L diesel from the '80s torn down. I cannot find decent pics or videos of that engine, disassembled, online. In particular, how the injector pump is mounted in the lifter valley, and how it interacts with the cam. Those engine blocks are high nickle and the crank bearings are 3" like the tall deck (big block) Oldsmobile engines. I have been told that they make for an incredibly strong bottom end for a performance application. But, I _Need To See One Apart_ so I can wrap my head around it. Thanks and congrats on the baby.

[@budgreen4x4]

There's a way to bore it out a little, and change rods and make it a wicked 500ci gas engine

[@heinrichgerhardt6119]

I overhauled the Olds diesel in my dad's Seville sometime in the late 80's. The injection pump is driven off a pair of spur gears; the drive gear is sandwiched between the cam chain sprocket and against a shoulder on the camshaft. Then a driven gear above, angled upward to improve access to the pump bolts. The pump sits in the valley just like that BMW starter was, except in the front; where, of course, it's cleaner there. The cylinder walls were 0.400" thick; it's like they used a 403 casting and only bored it to 350 cu in. The rods were massive as were the wrist pins. The pistons were cast, but they had steel top ring inserts. Starting in 80 or 81, these were the first GM engines to use roller lifters. And, yes, you could bolt on gas 350 heads and turn it into a gas engine. If you're really interested in how these things go together, get a GM shop manual from the early 80's. The illustrations are excellent.

[@JohnSmith-yv6eq]

@@heinrichgerhardt6119 The secret to a long life diesel engine with little replacement part maintenance... geared drive to both the camshaft and the diesel injection pump.....directly off the crankshaft. bullet proof engineering for pushrod engines...

[@midwestfarm757]

Growing up we had so many v8 Chevrolets, Oldsmobiles, and Buicks. They would run forever! I think the killer thing for us was the transmission.

[@sqmotorsports9230]

Don't think I've even seen one of those in 15 years.... super rare birds these days

[@SJWetz88]

The oil is fine, these don’t have lubrication issues they have load issues. The wear almost always occurs on the rod side of the bearing and once the babbitt starts wearing the bearing eccentricity relative to the crankshaft disappears. No oil wedge can form and the copper wears away and the bearing shell welds itself to the crankshaft. It’s why when you tear these engines done the bearings are either perfectly fine with maybe a spot of copper showing or they’re completely thrashed. Once the process starts it happens quickly, within a few hundred miles. Oil samples won’t catch it and personally I don’t think they’re worth doing. The increased clearance on the aftermarket bearings helps but if you do that 10w-60 is the only oil you should run otherwise the viscosity at operating temp may not be high enough to maintain an oil wedge with the increased clearance. My M5 is at 125k miles and runs like it’s new. These cars are built like brick shithouses otherwise and other than maintenance items they don’t need much if they’re well taken care of. For the price I paid for it it’s by far the best car I’ve ever owned.

[@Dragunov1185]

FINALLY!!!! I was so excited to see this one after asking about this one for so long. Thanks for being awesome as always!

[@hangman396]

Nice work, That wasn't too hard looking to deal with, congratulations to you, and your wife on the new addition to your clan...

[@TheBmarshall15]

Always warm the oil up to op temp. Replace your rod bearings which is very easy to do, and replace your fuel injectors and you have a bulletproofed s85.

[@NickKautz]

Or you can use an oil thinner than the factory 60 weight. 10w60 is the cause of all that engines oiling problems. 10w40 or 0w40 would be perfect.

[@weekendwarriorweldingdiypr4604]

Wooohooo!! Been waiting all week for this!! My favorite show has a new episode!! Congrats again on the new addition to the family! Time for a cold beer and a great teardown. Hoping for carnage but happy with whatever you're doing this weem.

[@johnfranklin5277]

Always happy to see another one of your great videos...here we go!

[@thomasperina2990]

Good Evening Eric & All: Thank you for bringing this engine to your channel. When I was doing consulting with BMW I was able to drive an M5 with this engine. I must admit that it scared me to death when all of a sudden the power came on. To me personally I think this engine is nothing but artwork but the constant oil leaks will drive you crazy 🤪. Thank you again for this wonderful video, TMP from N.J.

[@billyjoejimbob56]

Worked for a company that made internal components for the 7-spd dual clutch transmission used with this engine and its little brother, the 4.0 liter V8 in the M3. Had the opportunity to drive a German spec M3 on an unlimited stretch of Autobahn one sunny afternoon. Those engines were BMW's high water mark before everything went turbo.. I remember reaching 240 Km/h (150 mph) as the car hit maximum speed... in 5th gear! Two more gears to go but ran out of empty road and had to slow down quickly. Awesome engines and cars.

[@dkoz8321]

Art must be painfull. Otherwise it's not art.

[@wreak3r]

This engine seems like was over revved while cold for quite frequently. S85 and S65 gotta be properly warmed out before put load through otherwise those bearings go quick. I just did my s65 at 100k miles and they were still pretty decent, with minimal wear. But better safe than sorry with an expensive paperweight

[@JohnSmith-yv6eq]

MrElectrifyBF 23 minutes ago @Phil Brutsche proper OCI definitely helps but it's not quite enough unfortunately. My 131k S65 has had 5k OCI its whole life and looked incredibly clean inside with almost no varnish at all but was still starting to show hints of copper on one or two of the bearings. The main contributor is the super tight clearances, factory RBs run ~0.0013in. Luckily there are aftermarket solutions that are ~0.0025in that have proven to last the life of the car if not much longer at the very least

[@alouisschafer7212]

Dont they run a super thick oil from the factory like 10w60?

[@JohnSmith-yv6eq]

@@alouisschafer7212 Better to just squirt more oil into a bigger clearance so the oil cushion is larger so minimising wear...and the last thing you need on startup is thick badly flowing oils...

[@alouisschafer7212]

@@JohnSmith-yv6eq what they seem to be going for these days. Kinda loose engines, thin oil and lots of oil pressure they have introduced variable oil pumps for that reason to keep the pressure up at all times.

[@dr.krunkenstein5466]

@@alouisschafer7212 They do. When I had one it was ~$15 per quart and this one took ten quarts. Also the only place to get said quarts of unicorn tears was the dealer.

[@dps381]

I look forward to these teardowns every Saturday. Thanks for being my go-to end of the week entertainment! I'd love to see a newer skyactiv engine. I've had two Mazdas recently with the 2.5 and 2.5T, both awesome for different reasons. Thankfully they have been super reliable too, but I'd love to see what makes them tick! (No pun intended 😆)

[@dandel351]

Nice to see the working bits of such a rare engine. I hope it's not too far gone and can be rebuilt to go again.👍

[@ryanbrown918]

Love the use of ITB's BMW used on some of their M N/A engines. Nothing beats that sound..

[@brianpatten]

Another great video, Eric! Thanks for all the hard work you put into these. If you're feeling like a newer BMW engine is needed, Sreten over at M539 has an E92 M3 engine that's kaput.

[@yeahitskimmel]

Just wanted to say thanks for the deal on parts for my Miata from your eBay store, took me a sec to remember why I knew Importapart. Y'all rock!!

[@gobuffs1993]

You’d be surprised at how inexpensive it is to bore the block and get it retreated. I had Dinan do it to an S65 for under $1k including shipping. But that was a number of years ago. But then you need a stroker crank…then you have 5.5L and 600hp.

[@lennartswenson2690]

Much respect for the mechanics who work on these, and other engines, while in the vehicle!...

[@terrys6631]

excellent video and a real public service for the S85 owners. Thank you!

[@wafflesnfalafel1]

My boss bought one of those when she was promoted - she failed to maintain anything (no comment....) and now she drives a used Altima.

[@joeblowe7545]

But I'm sure she kept her salon, manicure/pedicure appointments right? LOL

[@Cynsham]

The videos I always look forward to watching every Saturday on my lunch break!

[@privateer0561]

6:03. Dropped a small part from the injector body into the second from front intake port.

[@moosenbeans903]

Normally the scammers have a " message me on Instagram " I haven't seen this one yet. You? I have been responding with utter trash but they dissappear

[@matthewmurphy8981]

@@moosenbeans903 - I just reported him and his impersonating channel.

[@ovidiurusu4490]

This channel is underatted. One of yhe best channels on youtube.

[@MRJBTA]

I"m in the market for an E63 M6 6-speed, this was awesome to see! Keep up the good work!

[@sitramaybe]

Saving this for when I rebuild my M5. Thanks a bunch!

[@allenbeaulieu7077]

Great job buddy. Hope you do well selling parts. Excellent video. Big Al.

[@johnoldonekanole602]

WOW , engines are so complicated today . Very interesting to watch you work .You really have a handle on what you do. Thank you for sharing .

[@ghostwrench2292]

The engine in this video was introduced in 2005 - 17 years ago. Compared to cars you can buy today, in 2022, the S85 is rather simple. Nevertheless, I would love to own an E60 M6 so I can experience the S85 being driven in anger!

[@derekfriday7931]

I just drove an e60 m5 today. Pre LCI with an smg. What a treat to see one of these being torn down tonight

[@anthonys7534]

Love the cam gears! That is quality stuff right there!

[@leagueofshadows5133]

142k subscribers so far! It's been what 5 months since u hit 100k? Keep up the good work. Sooner or later you'll hit that million sub.

[@michaelthomas-fu8rs]

The ABSOLUTE BEST tear down EVER!!! This was a car and engine I wanted. In 2004 BMW offered a "Soft Sell" driving school for a 15-19 year old across the country and we went to Houston NFL stadium. They used 3 series on a soapy skid pad, quick land change maneuvers, and rapid stops along with parents getting to check out what ever they wanted to drive. I took out a 7 series and a Z convertible- they were WOW factors. Across the stadium parking lot were new owners of the M5 V10 getting coached by professional drivers- that was a sight to see when they were going as fast as they could around corners- sometimes WAAAAAYYYYY TOO FAST in which they turned 360s which was a thrill. Keep up the great videos. NOTE- I have just now gone back to watch the videos of your projects. They are amazing. I agree with you on the Lotus completely and its doppelganger is on Hemmings right now. And YES yellow does look the best ! :)

[@MendicantBias1]

Tight bearing tolerances + 10w60 is a spicy reliability recipe

[@WigglingWaffles]

i like how quickly the chain tensioner came loose once you got your right forearm on the job

[@miraclemiler71]

There is something incredibly satisfying about listening to the stripping down sounds in quick time @ 2:39

[@closedjaris]

Thanks for the great teardown. This engine has been able to stir my emotions when it sings from 7k to its redline, and then it shifts to the next gear.

[@ainsmas361]

Yeah into 7th at 190mph!

[@charlesshamseldin9555]

One of these passed me at WOT a few years ago with open headers and I remember thinking two things: First, the sound was absolutely godlike and you felt it shred the air as much as heard it scream. My second thought was I wouldn't want to ever have to pay to rebuild it. I heard the guy around in the neighborhood for a few months but then he disappeared. A part of me hoped he just moved away and that's that. But I suspect as much as he was hammering on it all the time it is more likely it grenaded and that's that. Meanwhile, my simple boosted shitbox is still going strong.

[@johnnychimpo7539]

Totally wrong. Those cars will have issues if you don’t drive them like a race car because that’s what it is

[@johnnychimpo7539]

I saw one of them recently on the highway with an exhaust and it’s such an amazing sounding engine

[@jamesgeorge4874]

Thats why my boosted shitbox is an Inline 5, as close as it gets to V10 sounds.

[@diablocls55]

@@jamesgeorge4874 Volvo?

[@jamesgeorge4874]

@@diablocls55 yes, Hilton tuned V70T5.

[@ProjectFairmont]

Such an interesting engine, Individual TBs and they make an exquisite sound.

[@CaptainSpadaro]

I did not know these were closed deck; makes sense though. Neat. Always sad when engines like this get neglected.

[@josephsmith1858]

I don't know anything about cars but I've been watching these vids all day long

[@FrankyRedEyes]

Really excellent channel presenter, content and editing.

[@jasons3191]

Definitely one of my favorite videos to date! I have an e60 M5 with a manual and it's great to drive, but it is certainly a maintenance pig.

[@moneyshifters]

Luckiest person ever

[@EagleEyes11497]

@@moneyshiftersnothing lucky about having to deal with one

[@moneyshifters]

@@EagleEyes11497 v10 to a 6speed, doesn't get better.

[@TheMadTube]

Aaaah, the “rod bearings as wear components” engine.

[@ekscalybur]

Things that make you question that world renowned engineering. Almost as bad as an engine out belt service.

[@PatricioGarcia1973]

@@ekscalybur well it’s a 500hp N/A that revs to 9k, not a sbc

[@marklemist6928]

@@PatricioGarcia1973 welcome to 1969.

[@mattgaynor1847]

Big deal lol 5.2 v8 ford voodoo makes 526 hp na and revs 8k+ not impressed with this over engineered piece of garbage

[@johnnychimpo7539]

@@mattgaynor1847 are you actually comparing a mustang to an m5. The m5 poops on any mustang ever made. How’s that class action lawsuit going with those lovely voodoo engines by the way?

[@EagleEyes11497]

I’ve been waiting so long for this video

[@Anthony-tb5vg]

Hello I really enjoyed watching your engine teardown video. I was trained in the automotive field myself, but painfully had to abandon it due to serious mental illness problems. Don't know if you have ever heard of OCD but this rotten illness has caused me to become disabled and not do all the fun work that you do on automobiles. I wish I was able to do this work but unfortunately I became sick, I still though enjoyed watching you work on these engines as engine work was my favorite part of automotive mechanics. Anyway thank you for the interesting video, I really enjoyed watching it. All the best to you.

[@TCGTV98]

Being a car guy, i had to subs this guy for engine teardowns. I just love this shit❤

[@starkindustries26]

10:08 “cut to yeet” love that you’ve laid into that and embraced the yeet

[@poohssmartbrother1146]

Now this is one I am going to enjoy. Overall I prefer the e39 M5, but the sound of these ole v10's is something else

[@992turbos8]

This was my first M5 , I always wanted to see it torn down. Thanks

[@Flies2FLL]

This would make an awesome boat engine. Imagine this in a 21 foot mahogany barrelback with through-transom exhausts....

[@FishFind3000]

She should sound amazing

[@bigduphusaj162]

No it wouldn't they cannot take full throttle for extended periods, these engines are diabolically unreliable there are issues everywhere. Boat engines need boat engines that were designed to run full power for their entire lifespan.

[@Flies2FLL]

@@bigduphusaj162 You make a very valid point about extended periods of full throttle operation!

[@deanharris7149]

The difference between my Mustang Cobra and my M6 is the Mustang was made to be a $20k car with some goodies added, the M6 is a $108k car. I don’t track it but I do love to drive quickly through the twisties.

[@MurphyTheBandChild]

So that's why Toyota and BMW wound up working together. They're both fond of starters mounted in the valley of their V engines.

[@earlscheib7754]

Northstar did it first.

[@S1lverArr0w]

The bolts being inside the bell housing is absolutely evil

[@sqmotorsports9230]

@@earlscheib7754 you made me shudder when you reminded me of my Northstar Deville and the liquid-cooled alternator. A pox on the house of whoever designed that thing...

[@earlscheib7754]

@@sqmotorsports9230 yup early Northstars had the liquid cooled alternator, apparently BMW and Mercedes thought that was an idea worth copying 🙀

[@mbrick]

@@S1lverArr0w I thought that may be the case. So pulling the engine for a starter? Oof.

[@BITTYBOY121]

S85 - Best engine BMW ever made - Bring it back with bi-turbo !

[@currentbatches6205]

2:52 - You do a very good editing job, 'fast forward' where nobody cares about how a wiring harness is fastened to the engine. 5:22 - On a Cosworth DFV (vintage race engines), the injector manifolds are fastened to the heads with (4) #10-24 Allen-head cap screws around each port, with ~1/2" clearance above the top of the head and no radial room to swing a shortened 90* Allen key. 32 screws, each loosened/tightened 1/3 of a turn per engagement, say 1/2" thread depth. If race schedule allows, save "R" and then "R" for the mornings when you don't drink coffee. We all have our fave shop-made wrenches and they all have a string taped to them, since, if it pops out of the head without restraint, it drops right down to the center of the V where you can't get it without removing all the stuff you were planning to remove. (If you work on enough of these, you get a collection of other's fave shop-made wrenches.) 12:17 - Is that a front anti-vibe 'flywheel'? 15:01 - The cam bearing caps will show the wear. 17:10 - If you can see it, it's too late. 21:16 - Thanks again for showing the chamber 27:56 - How is an engine "overdue for rod bearings"? Is that a service issue at X miles?

[@allenl9031]

More pistons! More carnage! Yeah! Those individual throttle bodies are so nice! Someone needs to hotrod one of these and have 10 stacks sticking up, like old F1 and CanAm cars...

[@ehrenkrause9861]

The fact the cam phasers are gear makes the timing precise like a diesel engine. Less chain less stretch.

[@nbrowser]

Admit it...y'all come for Blue's prying abilities!

[@nerdboy423]

I came here from the 5.2L Audi V10 teardown. I own a relatively high-mileage S85 M5, and you're correct about pretty much all of this. It ONLY looks good compared against that 5.2 :P I will say, they do last longer if you go easy on them in the 400hp mode. I credit that with keeping my rod bearings from spinning until 143k when I learned they were a problem and got them replaced. Mine was daily driven for more than 5 years, a lot of cold starts/short trips. I got lucky; I deferred a lot of oil changes and maintenance when I was younger and stupid(er). It's still purring for me now, but I'm probably not tracking it again until I get a new set of rod bearings. Regarding BMW's decisions; the rod bearings were probably under-clearanced in order to wring the last few HP out of it for the marketing brochures. And possibly get it over the finish line for emissions targets. The cost is engine reliability, and they probably knew it. It'll outlast the warranty, but that's about it. There are aftermarket bearings that (probably) fix the problem. There's aftermarket stuff for the throttle actuators, too, which like to wear down gears and blow their control circuits.

[@homocidewhore4171]

Similar story to me and my F10 550i. Been with me as a daily for years now and there were points where I was slightly negligent on maintenance and frequent oil changes, but she’s been with me for 97K miles in my ownership and across the US plenty of times without issue.

[@NickKautz]

All that engines oiling problems are a result of 10w60. 60 weight is too thick of an oil for bearing clearances of 0.015" in a street car. 10w40 or 0w40 would be ideal and probably free up 5-10hp too.

[@DadBodGarage]

I always love the commentary. 😁

[@hellkitty1014]

I think many buyers of the S85 era just didn't understand the complexity of this engine, but I also think BMW failed in not providing the masses enough info on these. This engine family is literally based off of BMW'S race program of this era.(hence the power density and high-revving nature). A great deal of these engines had very poor maintenance intervals and had the piss driven out of them in the process. But then again BMW was also producing the N54 and S65 during this time too...soo....whoops.😩🤔

[@philbrutsche8928]

The one of the biggest problems with all BMW engines from the era is the marketing lie of the extended oil change interval. I'm fairly certain many, if not most of these blown S85 and S65 engines, would be fine if they had stuck with a 5k-6k mile oil change interval with the correct oil.

[@moosenbeans903]

Totally agree. People with more $$$$$$ than brains. Waste

[@johnnychimpo7539]

E60 m5 is happiest when you drive the piss out of it. Mope it around town and that’s when you have issues

[@greebj]

N series V8s in the E65/66 also suffered from this long oil change interval stupidity And the trans in my E34 which apparently never needed a fluid change, ever, so this craziness was there back in the early 90s

[@hellkitty1014]

All true points. I recall exactly when BMW started advocating for 10K mile oil change intervals, and the public fell in love with the "3 years of complementary maintenance". That was all good if you leased the vehicle and ditched it before the problems showed up. But the second-hand market guys always got the shaft. BMWs also used oil between those intervals, so many of the problems resulted in oil starvation.

[@gregoryweber7408]

wow that motor looked like a monster until you cracked it open and showed how it started to eat itself what a shame that lack of maintenance ruined another thanks for the education again sir

[@jasonhaman4670]

I, for one, miss you camming the crack caps loose, capping the cam cracks loose, and all other iterations thereof. Also, I see you've upgraded your perfect part distribution paths, to an express shipping carrier.

[@marksakowski9272]

Great as always!

[@myskman1]

This is my favorite BMW engine very cool

[@normanschenck6906]

Finally the engine I've been waiting for. I bought a new M5 in 2006 and got the BMW warranty. After 5 years and 99k miles they told me I had over 23k in paid claims. I drove it pretty easy with a 90 mile commute each way 3 times a week in CT and never needed brakes or a clutch. On delivery it lasted 6 days until an oil puddle the size of Texas in my garage put it on a tow truck. Left me stranded 3 times with transmission failures and "limped" it home 3 times with vanos and throttle actuator failures. Now I've inherited my fathers E64 M6 and it's needed rod bearing, vanos line, engine mounts, throttle actuators, ignition coils.... it goes on. Driven from FL to CT twice in the past 5 months and all good. When they work they are a bunch of fun. Fantastic video as always. Now I have to go change my oil.

[@davidstewart4570]

Wow, are you living in the car? Sounds like you probably had to sell your house to pay all those workshop bills!

[@JohnSmith-yv6eq]

@@davidstewart4570 No; he got the new car warranty...so all the work was done for free by BMW...to the tune of$23k! I hada friend who had the same thing with a new Jeep. Optioned up by the dealer. 5 years warranty...$5k in repair bills on the Jeep each of the 5 years of ownership. Then when the warranty ran out he retired the Jeep and built an all Toyota offroader (with a fibreglass replica Jeep grille)

[@habpar6531]

Yup, M cars are engineered to fail.

[@NickKautz]

10w60 is the cause of all the oil related issues in that engine. BMW was sued for excessive and avoidable engine failures and later realeased a bulletin recommending thinner oils. 10w40 or 0w40 would have avoided the stigma surrounding this engine, as well the other BMW engines that recommended 10w60 and had 0.0015" bearing clearances.

[@curtismclendon4275]

6mm wratchet wrench with the correct Allen head bit usually works in tight spots

[@khelangraham3071]

Facts bring the manuals back.

[@FishFind3000]

Finally a quality engine

[@jeffreymoore7729]

amazing Intake ports, those are factory...whooah, i'd like to see how the engineers make the "golfball' dimples, Awesome job!

[@blown572hemi]

Love the exhaust tunes these things sing

[@Flies2FLL]

"It's perfect" Whipppp......... Nice!

[@JohanFasth]

What a beast of a engine!

[@Tony-112]

Those throttle bodies are a work of art. 👌

[@e-cubedsolutions-wd8ft]

ITBs FTW! I told those guys over at Build It Yourself to do ITBS but instead they went with a custom sheet metal intake. Not my cup of tea but still their V10 build should sound pretty cool! Please do a colab with them! I’m sure you could teach them about what to avoid in their build!

[@hynestimothy411]

Great show

[@ouch1011]

I’ve only worked on 2 E60 M5s, one needed a clutch assembly (SMG trans) and one needed a VANOS assembly. Oddly, they aren’t much harder to work on than a V8 BMW (which isn’t easy). That said, the absolute absurd complexity of these engines vs the power output really makes you appreciate what Honda was able to do with engines like the spicy versions F20, B16, B18, K20, etc. I think almost all of the high output versions of those engines put out as much or more HP/L than the S85, but all of them are brilliantly simple and dead reliable.

[@randywooldridge9064]

Thank you very much !

[@aliensounddigital8729]

Beautifully designed engine.

[@anthonybertone2336]

Never really been a fan of BMW Mercedes or Audi, But I’ll love watching you tear one apart,

[@Cynsham]

Love the cars but hate the whole "German Engineering" aspect that makes them cost an arm and a leg to maintain

[@lieutenantdan8170]

As far as reliability Mercedes is the best

[@FishFind3000]

@@Cynsham but it makes for a excellent driving car

[@CharlesPaytas]

Sadly for me I own two E60 M5 cars. I also have an extra S85 engine and SMG Transmission in my garage. I've been building S85 engines for a while. It's a Love/Hate thing for me. I LOVE the the S85 cars when they're running, but totally hate them when I have to fix issues. I buy S85 engines all the time as I have solved the common issues with them. I watch your videos nightly. Thank You, and I appreciate what you do.

[@gabrielgilguitar5407]

Been waiting for this one 😈😈😈

[@V8.777]

You should check out the price for OEM knock sensors lol. Beautiful piece of engineering, a masterpiece in fact, however like you said, preventative maintenance is key with that lovely engin. All the best to you and thank you so much for these videos.

[@509brown]

Thank you so much...loved it! How many water pumps are under that car outside?

[@arsenk-yan1202]

this engine is a legend, we will never again see something like this, (for this price of course)

[@tptrsn]

The alusil is actually just a high silicon aluminum alloy that the engine block is cast from. The last step of preparing the cylinders is a special honing/lapping process that reveals the silicon globules by eating away at some of the softer aluminum matrix between the globules. I found that the alusil bores are actually pretty resilient if given half a chance, and they don't wear as much as ferrous cylinder bores. I'd be tempted to grab some of the special sunnen honing paste for alusil bores, and have a go at those to see if they come around.

[@habpar6531]

In theory it doesn't wear as much as traditional steel cylinders but in practice i don't believe it holds up. Stick a bore scope in any engine with 150,000km+ and you're likely to see scoring on the cylinder walls like this engine.

[@kevingreen3923]

Hey Eric, Absolutely love your channel and everything you do. Any chance we could see any volvo engines in the future? We had a volvo 740 wagon with a the 4 cylinder and it blew a rod on the freeway. Even with a hole in the block and a lifter that shot threw the oil pan, it still ran with no oil or antifreeze. Hope you have an awesome weekend and keep up the good work

[@ghostwrench2292]

Volvo redblock. Can't kill those! 😎

[@kevingreen3923]

@@ghostwrench2292 Even before it blew up, it had 250,000+ miles on it and it still ran like a champ. It wasn't the fastest thing in the world but it was solid

[@williamcap2236]

Oh i love that vette ! One of the nicer C4's you can get 6 speed too !

[@JeremyinCars]

Buy it and kart it out! kzbin.info/www/bejne/m5TKmIptgd9rjZI

[@DDE_ADDICT]

love this show

[@hamie63_m]

Heyy I requested this the other day !

[@BenKlassen1]

Naturally aspirated engines are nice. Linear power delivery. Inter-piston spacing looks very tight. No re-boring these blocks.

[@JohnSmith-yv6eq]

Apparently you can skim the cylinders and recoat....

[@glennshumaker2019]

Hey Man another great teardown, I love German engineering and the way their assembled, I have watched some assembly videos. It seems like the engine was high mileage and possibly not taken care of the way it should have been. One thing is the cylinders I have read some stuff on Jaguar engines the early engines had no liners in the bores either, the coating was sprayed on the cylinders(if I'm not wrong), and you had to run a certain engine oil in them to keep from "wiping" the coating off, you know didnt work with the Vega, they were junk anyway. These engines are very complicated, and the tolerances are a lot tighter with no liners, well they are in the Jag, like every teardown you and Alvin do.....LOL Cheers

[@glennshumaker2019]

@UCh1FChraAQeUrIPq3TcbrDA I have been watching your stuff for a while, I am definitely a gear head. I was a diesel mechanic for 26 years and have worked on so much stuff, I could go on and on, I even learn a few things from your viedos, engines have always interested me and how they are engineered, the Germans have the engineering thing down pat, I am amazed at some of the distruction that happens, like the Marauder engine, how the flock did that happen, the brick on the throttle ???.On the Avlin thing when you speed up the video your voice speeds up too, sounds like Alvin, but enjoty your stuff keep on doing them Glenn in West Virginia

[@kevinmcewen1760]

“I might have to do questionable things I’m not proud of”… I see you and I went to the same mechanic school

[@anthonybertone2336]

Just never been a fan of BMW or Mercedes or Audi for that matter, I know a lot of people love them, But I love watching you tear one down though,

[@FishFind3000]

Nothing drives as nice

[@donnieweston3249]

Oh this is going to be good

[@TestECull]

3:35 It amazes me how you open one up with little more than a golden sheen to it and call it dirty, but I open one of my engines up and there's a 1/8 inch thick layer of jet black schmoo covering every single square inch of metal that doesn't rub against another piece of metal. I would KILL to have one of my 300s look like that after more than 3 or 4 PMs. Happily enough 300s generally don't give any fucks about the layer of schmoo covering every internal part, but yeah. This is NOT a dirty engine.

[@nigelalderman9178]

Had an old Merc, needed a head gasket at 450k miles. Always synthetic oil. Looked like brand new.

[@TestECull]

@@nigelalderman9178 I have no idea what either of my 300s got before I bought them. I got my eldest in 2007 with 200k already on it and it hadn't exactly been pampered for the first 32 years of its long life. Plus, it's carburetted, and those old engines are built floppy as fuck besides, so there's quite a bit floating down into the sump that generates sludge. Combine that with the fact that they were built back when dino lubes were still in common usage and voila: You have that layer of schmoo coating every surface. I feed it pure synthetic today, so that layer isn't building up like it used to, but that engine will never be clean until it gets torn totally to bits and steam cleaned as part of an overhaul process. It prolly won't get *as* dirty after that, but it will still get a lot dirtier than the engines Eric calls dirty and it won't give a single fuck about it.

[@coltonmessner8102]

I would love to see you take apart a 2.7 liter 24valve that comes in the moped vehicles

[@basshead993]

I would love to see a tear down on an n18 engine. The motor used by peugeot and bmw`s mini coopers. I would like to do a rod and piston replacement in my own car and a video from you would be my desired medium for information. You do great work and are a wealth of information. Thank you