How to avoid murdering a V10 engine (easy BMW S85 diy)

[@Mr_g.h.o.s.t.e90]

I’m lookin to buy one of these in the near future so I’m jus doin as much research as possible, this definitely helped 🙏🏾

[@MTechGuy]

Nice one man, glad the video was of some help. check this one out too- kzbin.info/www/bejne/ene9dISjlL1lhaM Good luck with the search for an M5 👍

[@DG-xj7pm]

You'll be sorry, get a f12 or f13

[@Mr_g.h.o.s.t.e90]

@@DG-xj7pm I actually decidedly to buy an f30 340 xdrive instead maybe I’ll get one in the future tho!

[@DG-xj7pm]

@@Mr_g.h.o.s.t.e90 I just got a 2013 m6 with 16k miles

[@artbrookey3468]

Ok, gotta add my 2 cents here. I have two of these. First of, STP is hype, like Fram filters, all hype... use Lucas fuel system cleaner, it does it all, not injector cleaner, use the fuel system cleaner...Lucas. Ok, rod bearings Yes, warm it up correctly [it's vital]. I believe with all my heart, if there were a problem with the material in the bearings BMW would have fixed it...there isn't. Proper warm up, use the correct oil, 10w60 only, not 10/40, 20/50...no. I know the 10/60 is pricey, but what many don't know is the 10w60 is vital for the vanos system, the high pressure line internally and lubrication...I could go on, but.......................

[@nenadradmanovic9383]

Lol never use 10w60 on s85

[@artbrookey3468]

@@nenadradmanovic9383 Yea, you know better, right? I mean I forgot, you designed, built, raced these engines...I forgot

[@nenadradmanovic9383]

@@artbrookey3468 had only used 5w50 on my manual m6 for past 140k miles. Owned e39 m5 from 70k miles to 220k and only used 5w50. Tracked both cars and never had any issues. 10w60 is garbage oil and is cheaper than redline 5w50.

[@artbrookey3468]

@@nenadradmanovic9383 I don't doubt that some get away with it. My wife's Jeep says 5w20, but I know I can get away with using another weight, just like you can go from synthetic oil to conventional oil, and might get away with it. You do your thing, I will stick to what BMW motorsport and every respected shop has told me with the three E60 M5's I have owned since 2010

[@Bimmer_Bill]

The foremost s85 engine builder in likely the world recommends redline 5w/50. The vanos system is dependent on oil flow which is affected by pressure. Fact is a thinner oil flows more. Here’s some fluid dynamics equation for you…Flow = pressure/resistance. Resistance = line length x viscosity/ line diameter cubed. So, if resistance is greater due to viscosity (given all variables are the same), the higher viscosity oil will not flow faster than a lower viscosity. The question becomes what’s the oil pressure with lower viscosity oils and do they offer adequate wear resistance? If oil pressure is good, then flow will actually be improved and the vanos system will not be compromised. I use a racing specific full synthetic 0w-50 oil because of the much greater amounts of wear additives than standard synthetics. The problem is dual, the extra additives will eventually foul catalytic converters (my cats were removed) and less detergents meaning more sludging over time, so I change the oil at 2-2.5k to keep the engine clean.

[@LSmiata]

Hello M Tech Guy, I actually just replaced all injectors on my M5 as maintenance while rebuilding the throttle valve actuators. My NEW biggest concern is the lines from the tank and even the fuel rail. No filter and degradation of the fuel feed system could compromise even NEW injectors! PS: Have many engines....2 full, plus 2 short blocks....plus car. Purchased engines before car to learn. Two engines clearly hydro locked with bend rods and bores scored so badly, they could not be re-finished in Alusil at 0.2mm over......GRRR! Have you added a fuel filter yet? Interested in near OEM install for filter near rail to minimize potential of clogged/open injector. Cheers, P-Chi

[@MTechGuy]

Sounds like you have a few S85’s to play with 👍 The fuel filter at the tank is fine so long as it’s changed out now and again

[@LSmiata]

@@MTechGuy Hello M Tech Guy, Yes, I do have a few engines to play with. I have been researching the S85 for years, and have wanted an M5 even when they were "ugly" (e28), but it was so powerful, I fell in love! The M5 has always been a wolf in sheep's clothing!...but not a big fan of the newer "hot block turbos". Love your videos and please keep posting. I now have a vehicle and am doing maintenance beyond just my "play engines". As for why I replaced fuel injectors and ask questions on fuel system....please view link below on the M5board. www.m5board.com/threads/s85-bore-issues.607517/page-4 Cheers! Mr. P/P-Chi

[@MTechGuy]

The E28 M5 is a nice car! Not a big fan of turbo charged cars myself either. Wouldn’t mind a spare S85 to make some vids on. Will have to check out that link, injector fail more common that we’d like aye! Thanks for following the channel man, Merry Christmas 🎄

[@LSmiata]

@@MTechGuy Merry Christmas and a Happy New year to you and your family. Hope you keep the M5 content, and all content up for 2022. Cheers, Mr. P/P-Chi

[@Swaucey]

What would be the best ideal proper warm-up for this car?

[@MTechGuy]

Let it idle for a minute after start up, them drive it straight away but keeping the RPM’s under 3000 until the oil has reached normal operating temperature (approx. 95 degrees C) 👍

[@mattb6595]

I allow warm up to the point where oil temp is just over the bottom of oil temp gauge..roughly 3 min in moderate climate

[@jonq95]

I change my oil every 6k miles or 1yr whichever comes first. I also warm it up for about 2min. I have 126k miles and the car runs like a dream. Should I get the rod bearings done as a preve measure? My indy says no.

[@MTechGuy]

That’s a really good question, I plan do do a video on this very soon

[@wesleyorrin]

I would change them as soon as you can. No matter how careful you are, changes are you will see copper on them, especially on the top bearings. Use the BE bearings.

[@alexbryant5]

Hey mate, love your videos they are incredibly helpful. i just got an m6 and put a bottle of injector cleaner in but wondering if i should budget upfront to just replace the injectors. its got 122km on it and has barely been driven by the PO in 2 years

[@MTechGuy]

For sure a good idea. I owned my M5 for 3 years before I did mine, but wish I’d done it sooner- kzbin.info/www/bejne/baDXfKiir5lmjbs

[@Contrerasfactory]

When you replace vanos oil pump pistons and engine block, it brings back the 507 hp and engine life back on 0?

[@spectres_garage]

Since I live in California we only have 91 octane gasoline so should I buy a barrel of higher quality gas or am I good with what we got over here?

[@MTechGuy]

91 US = 95 Euro RON, that’s the minimum octane you’d want to run these cars on

[@nacostacos]

You must remember though that Cal/Ariz/Nev 91 is terrible compared to actual 91 elsewhere. I'd recommend adding VP Octanium Unleaded every few tanks if you rip on the car hard often. It'll kill multiple birds with one stone. Fuel injector cleaner and octane booster and it's still safe on factory o2 and cats.

[@mattb6595]

If you use an octane calculator you can mix your own. Never ever go more then a calculated 100 octane

[@LSmiata]

@@mattb6595 Hello Matt B, Very interested in why I cannot use over 100 RON? I am not a chemist, but my understanding is that the higher RON actually reduces the flash point of fuel to avoid knocking or pre-detination of the fuel/air when compressed. It does not, by itself, offer higher performance. This is very important for high compression and turbo cars, but not does not add performance if not needed, but could actually reduce performance on low compression engines. At over 100 could the engine not have a clean fast burn in the cylinder with spark ignition? Please advise, P-Chi

[@505M5POV]

Mtech guy, what is you opinion on an engine tune??

[@MTechGuy]

I wouldn’t bother. The S85 is an extremely well designed engine for the amount of power it makes. Tunes have been known to contribute to issues & failures. 507hp is plenty for a street/road driven car anyhow!

[@505M5POV]

@@MTechGuy mine is already tuned, but I didn’t feel much of a difference. I’ve put over 6k miles on since tune and it’s been fine. But I don’t want my shit to blow up

[@ShelbyWithAShelby]

@@MTechGuy mine might not be as reliable, but damn having an ESS supercharger on my M6 is fun. 675hp is definitely worth it

[@7akziz584]

do u still have the m5 e60

[@MTechGuy]

Yes!

[@7akziz584]

@@MTechGuy thank for the videos, it helped my uncles v10 survive longer!

[@MTechGuy]

Thanks, that’s great to hear! I’m glad your Uncle got some value out of the videos 👍

[@brucepeninsula2036]

Goat needs a cleaner too!!

[@MTechGuy]

👍

[@K06E]

I always use liquid molly injector cleaner every 2k kilometres... lol is that overkill?

[@MTechGuy]

Wouldn’t hurt, I do mine either every 6 months or right before an oil change, whichever comes first

[@asecret900]

Another good video mate keep em comin! But I really wish we would stop quoting American slang "rod bearings". We should all know by now a conrod has 2 ends and that S85's are known to consume big-end bearings. But we forgive them that small sin for all the grins & giggles per Klm in return :)

[@MTechGuy]

Big end bearings, that’s what I’ve known them as in my former life in the UK!

[@NickKautz]

Easy way to avoid rod bearing issues , use a thinner oil. 10w60 was just a boneheaded move by BMW. I understand why they chose it , but somehow they overlooked the most basic clearance vs. viscosity fundamentals in pursuit of slightly more protection elsewhere. S65 and S85 have tight rod bearing clearances ideal for a 30wt or 40wt max.

[@MTechGuy]

Hear a few guys out there do this. Many things to consider with regards to oil viscosity choice- climate the car is used in, VANOS system that operates at 8000kpa, how the oil holds up at 8k+ rpm, additive package, oil choice available in owners country etc.etc. I use 10w60 myself here in NZ, regular changes, proper warm ups. Each to their own though 👍

[@NickKautz]

@@MTechGuy Top fuel dragsters that make 10,000hp are the most violent motors with serious flexing and vibration stress happening. And they run 70wt, which is the thickest of any engine I'm aware of. Formula 1 and Nascar both use the equivalent of 0w10 to 0w15. But they are proprietary formulas. The average road-going car runs 5w30. So , from these angles as well , 60 doesn't make sense.

[@crisnla1]

I use 5w50

[@yujyuj2957]

What are the clearences?

[@NickKautz]

@@yujyuj2957 0.0013" - 0.0018"

[@abhishekarora3631]

Hi M Tech Guy- at what kms would you recommend changing the rod bearings? Thanks mate

[@MTechGuy]

Good question, depends on what kind of life the car has had. +/- 120,000 km’s for certainty, do the HP Vanos line & inspect the Vanos pump at the same time.

[@TheDarkstarsk8allday]

I changed mine at 50k they had maybe 10k miles left. They were already starting to show copper

[@christianpadilla2928]

@@TheDarkstarsk8allday 50 k miles you mean, mine has 45,000km I'm wondering if I should perform rod bearing service. I do have a tune and primary cats removed.

[@niko8638]

"masterpiece" 🤣

[@lewis72]

That V10 is not a masterpiece at all. It's an underdeveloped piece of crap. These rod bearing problems should have been sorted out in the engine development stage.

[@MTechGuy]

Are you speaking from experience? Have you owned one?