BLOWN UP another BMW M3 Engine!!! Tear Down and Diagnosis...

[@azharcassim2795]

RIP This Channel. Havnt seen a new post in ages. I miss the content.

[@heidelbergaren5054]

Resurrection today

[@aristidisgioulis8044]

Please make those technical conversations with David and in general about engines and what not happen more frequently. So cool to get an insight into racing by a driver. Such a nice guy. And also more BMW content😁.

[@yanzi1957]

^^^

[@mgcharoudin]

Plot Twist: Pancake told George what was wrong with the engine.

[@PixelVogue]

Panchanic

[@anonymous..-]

At least he stayed behind to help instead of running off to Turkey.

[@RETMTM]

Psycake 🔮

[@RobertMitchell]

She knows what’s up

[@mgcharoudin]

@@anonymous..- trust me, George can do a better job when I'm not around. Also, I'm in this video, so idk what you're talking about.

[@windnsea03]

35K KM of Ring use and tuned is impressive, the recommended rebuild of S55's for GT4 race class is every 24k miles. Which is quite impressive compared to other manufacturers as Robert mentioned. Lol at people in this thread who think this is poor, most engines would have died long ago.

[@Matthew-nl9kd]

Yeah you really need to factor in the tune, you can't expect any guarantees when you take something well beyond the manufacturers specifications. BMW really did a brilliant job with the S55, if that's how it does with a tune that adds ~100hp think about how solid it is if you keep it stock...

[@CL9k24a3]

@@Matthew-nl9kd its a trash a frkn block got cracked ffs

[@Matthew-nl9kd]

@@CL9k24a3 Stay in school kid

[@Nelthalin]

I wonder what kind of milage they would have gotten without a tune.

[@1980VINZ]

@@CL9k24a3 When you don't know what you're talking about, that's better to shut up.

[@kcw9313]

Would be interesting to see how the S58 and its torque converter automatic stands up to the rigors of Apex N'ring demands. Also keen to keep an eye on how long the GT2RS engine lasts before it taps out. Thanks to Robert and his team for sharing this one-of-a-kind content. Riveting stuff for me.

[@Leshic2]

Riveting as well for me. Great stuff. Curious about all the same.

[@unicorn7337]

I love how George had to stop working to play with Pancake when Misha showed up with her! 😊 I wouldn't be able to resist either! 🐾

[@Richard_Turner]

Tearing down the engine is easy, putting it back together in a working condition, now that's a different story, I know too well for my own good on that one 🤣

[@Leshic2]

Ha! You are very right there!

[@mcspikesky]

Install is just reverse of removal!

[@topsu_u]

When I did that for the first time I tore the engine down in few hours and then put it back together in multiple evenings. And when cranking it the first time I was 90% sure I would just clattering. Still running after 3 years!

[@lollypop9580]

@@mcspikesky 👀

[@bwest6275]

@@mcspikesky except with all the important stuff like replacement of all the consumables, reapplication of the various greases on surfaces and bolts, replacement of the various seals and gaskets, torquing down the bolts to their exact specifications...just those "little" details in the re-build, that's all.

[@mituc]

I think there was one more horizontal crack right in line with the next water jacket visible right at 19:23. That block with some better sleeves machined in can live for ever below 600bhp even with the stock internals from what it looks like now. The factory sleeves however seem to suffer somehow past some heat levels and the high power may be speeding up this process while keeping it at lower power will certainly not eliminate the issue, only delay it a bit.

[@tyrereviews]

Sorry for another M3 engine :( They're generally ok for tyre testing unlike some brands you mentioned

[@johnevans6474]

When I was a mechanic 50 years ago, stripping and rebuilding engines was my forte.

[@hristohristov8787]

So glad to be part of this community Robert! Tier 1 team 🤙 George thank you for being part of the video!

[@DonnieX6]

Would love to have a small video series of interviews with David about racing in GT3 classes and everything else you two can come up with! Also really enjoyed this teardown, thanks Robert and George! 😄

[@robertstarczewski]

Hi Robert, once again I have to wait till the end of the lecture;) can’t wait

[@RobertMitchell]

hahah keep it up Robert

[@rodneyyy95]

Blessed with a back to back upload from Robert himself! Hope you have found the motivation again to upload more often on YT! Curious to find out what happened to the M3 engine when I get home

[@davidsmall7676]

Robert, another great discussion/gathering. I really enjoy George related content. He like you is no nonsense and direct. The enjoyment comes from the love you both show for the interactions with people, cars and the awesome relationships that this mashup of hardware and mind. Thanks

[@dajobra]

Hi Robert, why don't you sleeve the block with fresh pistons and rods? Should be stronger then stock if done correctly. Andy from subi performance can do it

[@BozhidarEnchev]

Awesome content. Quite educational.

[@RobertMitchell]

Glad you enjoyed it

[@nobody.no-one]

@@RobertMitchell looking for u my man 👀

[@RobertMitchell]

@@nobody.no-one 👋🤣

[@nobody.no-one]

@@RobertMitchell hey, miss your uploads Roberts 😅😖, how are you? Do you doing fine?

[@nobody.no-one]

@@RobertMitchell Glad to hear your being 😇

[@RDSAlphard]

4:02 - Gen IV Small-block GM V8 already has Variable Valve Timing despite it is a push-road overhead valve engine, and then Gen V would see them become direct injection; I'd say the BMW S55 engine is only complicated because it has valvetronic (variable valve lift) on the intake side... otherwise it seems to be pretty standard DOHC stuff.

[@montevallomustang]

Dodge has the same on the newer hemi, and ford just came out with vvt on the godzilla engine

[@clarkyclarke9817]

I’ve been missing you’re vids Robert especially the more technical ones. Great vid.👌🏻🤟🏻

[@DrehzahlDieter]

On another note, the video quality of the iPhone 13 Pro is extremely good!

[@velvetjones1856]

Robert you should have been a teacher because you have the gift to explain things in a way they can be understood..

[@the_mcmartin]

Technical videos like this are always welcome. So much to learn and its so fascinating to see how many parts to into an engine. Most engine/car related documentaries don't even come close to what's being shown here. REally appreciate the effort that goes into making these videos for us.

[@radicalroy27]

Great to to see George doing what he loves ❤ and Pancake coming for cuddles 👍👏 Great job boys! Also good to see David Pritchard racing hard 👌

[@protestagain]

As I mentioned in a comment under the past video, I'm a former taxi owner in a city. In the fall, the first snow came down, and the first crash because of it. A friday 01:30 PM. A nice lady with summer tires crashed right into my taxi. Nearly impossible to drive, but I finally reached my body shop. They got on the job, three men, with sledgehammers. At 05:00 PM the taxi was ready for driving that weekend. Not painted, but all in working conditions, and that's why we use cars as Mercedes in taxis.

[@RobertMitchell]

Gotta keep them taxis on the road!!! Sorry to hear of the crash but happy to see you’ve got a good team behind the operation

[@protestagain]

@@RobertMitchell Well, it's like you're taxis, you have to keep them running, and have a good mechanic ready 24/7.

[@protestagain]

@@RobertMitchell It was incredible to see how fast they could get that car running again, with sledgehammer

[@JDR1971]

Really enjoyed this two part.

[@AlexCapi]

I watched his 54 overtakes video, David is an absolute god on the track.

[@19minorthreat69]

I love the shadetree mechanic aspect of this teardown, no engine stand, no containers to hold all the components, just a palette and the floor. Awesome.

[@bwest6275]

perfectly fine when there is no goal in re-assembly.

[@buildanddrive]

@20:30 You can send off the block to get welded, honed and then sleeved and then use 0.25mm oversized pistons. Should cost around $3000 for a job like that to repair the block. Would be awesome to see if a re-sleeved block can survive longer than a stock one.

[@bounzig]

Would that really be a valid option for a rental race car? I can see it being a solid option on a private street car. But as a rental race car that needs to make revenue I would go with the safer option, since breakdowns cost about double, parts and repair + missing income + salary to employees.

[@buildanddrive]

@@bounzig if a resleeve is done properly on an iron block, I would assume that would be stronger than stock. On an aluminum block I don't know. Anyone else with sleeve experience chime in here 💪🏼

[@bounzig]

@@buildanddrive Point is, if it's not done properly it's gonna get hella expensive fast. Is it worh the risk?

[@buildanddrive]

@@bounzig def not worth the risk. I would find a shop that has already tested this with this specific block. I know many race cars that's sleeve the block in case something happens, they just replace the sleeve instead of replacing a block.

[@prime1971]

Beige trousers and an engine strip bold move!

[@RobertMitchell]

I survived too!!! No stains hahah

[@matthewmahy2604]

As an owner of an S55 motor, I’d be interested to see small bits made into keychains or desk ornaments if you do any.

[@rjnation5042]

At least your laughing about it, good to see that you wanted to know what failed, please keep these videos coming, Rj in Oz

[@tooclaws]

OMG, Robert is on a roll.and nice to see you back. :)

[@N4CR]

Could be detonation due to tune, it's also on the sides where the most sidewall wear (oval shape) will occur due to rod/stroke/piston inertia etc. Especially with high RPM. So if there is a place with maximum stress, it's where it failed, those sidewalls don't look too thin either. I'm not a BMW fan at all (I really don't like their reliability across the board) but it held up pretty well considering track/tune abuse lol. Next one I'd turn it down a bit or improve cooling and be very careful with keeping an eye on plugs/injectors etc. Or buy a real standalone ECU to monitor each cylinder, safer that way.

[@villtoraaldurald1134]

BMW just has been forced to stop selling models with the S58 motor because of crank/rodbearing issue's.

[@TheGutiserra]

We miss your videos

[@DBravo29er]

True enthusiasts. Thank you for sharing all the technical details. FASCINATING!!

[@mazz3794]

Yes for the key chain !

[@adropo20]

M2 Comp has joined the group. Great!

[@jafores]

Great seeing you filming again Robert , and this video (running the business ) is very interesting . I love your all around and “all facet” approach to doing things . Very refreshing . Pls keep it up 🙏🏼

[@Induleo]

Amazing macro capability from that filming phone! I really learned something, never seen a crack like this, thank you.

[@bertiecray8389]

Thanks for the great content. For a future video I’d love to see everything that goes into your geometry set up on your F80 M3’s and how you have perfected the handling for your needs

[@andypullin4702]

That was very cool to watch....tearing stuff down is always fun. Just makes you realise how complex modern engines are...and then there's all the electronics and diagnostics on top of that! Makes you miss simple engines like the old Minis...OK maybe not :) Even modern diesels are insanely complex and expensive to repair now. BTW Pancake said "block's cracked. Cuddles pls"....

[@rumblebelly7429]

David, another supercool man in the scene!

[@RobertMitchell]

He’s a good guy

[@malloymorgan3293]

Couple of observations Robert. Welcome back by the way, your laidback laconic delivery has been sorely missed! First, wouldn’t it make sense to keep the engine stock? After all more power equals more heat, stress and a higher risk of major problems and I think it highly unlikely that the customer’s lap experience would be diluted in any way if you ran stock power motors. Secondly, how important is it to have taxi drivers who can deliver the most exciting experience for your clients whilst being mechanically sympathetic to the cars? It was noticeable when I was in the GT2RS with Tim how he drove so quickly yet without putting undue stress on the motor, short shifting where necessary and no aggressive on/off throttle and braking movements. Anyway, excellent video and very informative.

[@WildShotZ14]

Robert's technical video at the end of my day is pretty much perfect

[@SamAustin]

Really enjoy seeing you back Robert! Great content and mixes it up quite nicely from Misha..almost a behind the scenes type vibe 👍

[@christiaanroos4479]

Wow bmw quality right there.

[@ZKozak-hp5vb]

Great content and always learning something new. Just goes to show that building and driving a car hard takes a lot more to sustain that level of performance than the original investment. Not a cheap sport, but whoever said "I want to spend 3k to end up exactly where I started 3 tenths quicker" is a rational person.

[@Majoralert]

Really love what u guys do. Real life heroes lol. You guys living the dream, enjoy responsibly lol. One day I’ll be at the ring. Can’t wait.

[@samellio]

Thanks for such a useful vid for S55 owners! It would be extremely helpful if you could look at the wear on the rod bearings as this seems to be an issue for some. Keep up the good work 👌👍👏👏

[@Sirmellowman]

might wanna get that head pressure tested, theres cracks going from the ex seats to the spark plug holes. pretty common, but you always wanna check. no need to toss the head if they dont go to into the water jackets.

[@mderijke82]

I want one of those key chains, yes please

[@marcnobel3938]

Wow! Another cool technical Video just one day after :-D - What a Comeback!

[@McLogo76]

That was fun to watch and also good insight. Great comparison with David‘s M6 GT3 ;)

[@kiliBrtoiP]

just like comments, sleeve the block and forget about issues. subi-performance and Philipp Kaess are two power maniacs

[@marcelomurlo6426]

As A Tech....I Had Exsactly The Same On An M3 E-36 Iron Block...Repaired With New Engine

[@romanchongy9353]

Good video, more of these with mechanical details and running information please! Interesting how you reference miles or hours (or brake pads) as different ways to measure ultimately physics and entropy. You use what works for you. You have to balance performance (and fun factor) vs costs but it would be interesting to see what run life you get from the the other engines you run at a lesser tune.

[@zhuoyuanli758]

Love these tech and talk videos! Keep them coming Robert!

[@lightconstruct]

What a constellation! I start to get suspicious that these all were scripted: :P :) Great to see Robert back with his laidback style. We can see George working on an engine. More family moments when Misha and Pancake arrive. A conversation with a champ... I just wanted get distracted for 30mins and wind down during work while i eat my meal. Such a treat! And im not even a "big" car guy...

[@RobertMitchell]

Glad you enjoyed. Def no scripting here haha. That would take far too much planning :-)

[@JH-ue2bo]

Wow, very interesting! Thank you! Unfortunately I have found it only now... Love you channel, love your company and Misha of course :)

[@eichler721]

Great video glad to see you back on KZbin Robert.

[@henryliang3430]

Would like to know what happen to the MR and did porsche replace it under the warranty?

[@bandie3481]

that keyring idea seems really cool

[@itisjustacomment]

Yes Robert is back .

[@grahamrobson9292]

Great professional video

[@martinchapman2168]

Good video

[@nobody.no-one]

Where are you? 😓

[@toy200sx]

"Excited" Wow.

[@apocrypth]

maan, that sound of Goerge's work over mic, ASMR :) ftw

[@davidhunternyc1]

Everyone? Please, when is Robert Mitchell coming back? There are so many Tier One's who want him back.

[@Borg561]

Yes to keychains and stuff!

[@marcnobel3938]

Would be cool to have that for the Gearbox of the Porsche too!

[@RichardHilverts]

Get that engine to Subi-Performance. They will sort and rebuild that no problem! They are nearby to you guys! Like this to get them to see this..? It will make a great video series for sure.

[@pabelmon]

Nice and instructive video, thanks guys ! (And I’m all in for a cool M4 key chain !!! 😉👍)

[@QQ-hm4nu]

Such an underrated channel

[@cardreamer687]

We miss your videos Robert!

[@Kasterey]

I'll do another comment and say this is just in time for my coffee, thanks robert.

[@RobertMitchell]

you're on a roll!!!

[@billyhess5263]

I would love to have a rocker key chain!! that seriously sucks, when you sent the camera over the cylinder to look into it after you wiped out all the coolant and oil I could see that crack immediately before you pointed it out (camera angle and light may have had everything to do with that though). I've had that same thing happen to me once, I was heart broken. Theres nothing fun about replacing an engine block. On the bright side, sleeve and girdle then add more power??!! or maybe not...

[@kiar775]

haha! Hi Robert, I verified your identity today and told you that I just saw the polo gti video and that I drive one myself. Do you remember? This actually made me happy and I wanted to let you know that you're data was and still is in safe hands. I hope you dont think I shared our little meeting with everyone. The only ones who will see your data are the people at the company you identified for. Thanks for being a nice dude even in "person" or on the webcam in this case! Keep it up and greetings from Bremen!

[@Little_Alesi]

"We´re the guys now!" ;)

[@chrise2329]

Always enjoy videos like this.

[@alexmat106]

Valvetronic key chain rockers!!

[@mattaria]

Really enjoying these. Thanks for posting again!

[@JeepCherokeeful]

Actually the later pushrod Viper had variable valve timing and Chevrolet has it in a their small blocks too;)

[@2wheelcobra]

Miss your content man

[@SuperWayneyb]

Genuinely been looking forward to seeing this video 🤘😎🤘

[@gr0schibre572]

George is a master. 👏🏼👏🏼👏🏼

[@kernplace37]

I like that Suzuki MotoGP MAC Tool Box.

[@steveskipper6473]

Loving the Louis Rossmann reference @19:30

[@WDLC1911]

Great video! Made me miss my days at GM Powertrain. Thanks.

[@rubberrocket7620]

Time to Kswap the BMW!

[@Timmayytoo]

My Gen III Hemi with variable cam timing would beg to differ with your statement about pushrod V8's. Variable lift is difficult to do when you have to feed the camshaft into the block, but variable cam timing isn't hard - all you are doing is rotating the camshaft with respect to the cam gear.

[@RobertMitchell]

I was referring to old school v8 so that I was discussing in the video. And if it’s a traditional camshaft you’re not just rotating it. You need to adjust the intake and exhaust at different rates to adjust the overlap as I was discussing.

[@Pecetos]

They are having a nice chat and gorge is grunting off camera XD

[@Scott555ish]

Very interesting and surprising to see such a crack on what looks like a pretty well closed deck block Rocker keychains would be cool.

[@einfelder8262]

There's a fair degree of erosion in the cylinder, each side of the crack. I'm tipping this block has casting faults, should be a warranty item.

[@jbrown7403]

Very interesting to watch as an F82 owner! Cheers from Texas! 🍻

[@dr.felipedbr2783]

Congrats dude for the record ✌🏻

[@andywong5606]

Great video! Appreciate seeing how complex modern BMW motors have become. I don’t think the block can be saved. From what I’ve read, the S55 block does not have a traditional cylinder sleeve. The bores are coated with an Iron alloy using a wire-arc thermal spray process and I would be surprised if BMW has a process to repair the coating.

[@hukatus]

It doesn't matter. The whole cylinder is bored out and replaced with new steel cylinder. Same as in this video kzbin.info/www/bejne/qJO3q2R-pJh8eqs

[@davidhunternyc1]

Wow, you guys are back up and running on KZbin! We missed you. Where have you been? It looks like you've all got even better looking! Must be that Estée Lauder Night Repair. Go figure. Anyway, I hope too you all enjoyed the Hudson Baby Bourbon Whiskey I sent you. ❤️

[@RobertMitchell]

Yes I’ll send you the discount code if you like!!!

[@davidhunternyc1]

@@RobertMitchell You're awesome, Robert, but I'm a minimalist. I don't have a single thing in my apartment with a logo on it. My TV has a Sony logo on it and so does my refrigerator and stove but you get what I'm saying. I need nothing. If you had a discount code for a Porsche by Singer, well then, that's another story. I'm just thrilled to see more content from your channel. Onwards and upwards!

[@RobertMitchell]

@@davidhunternyc1 true, as a minimalist you can get your brown summer tan outside with less stuff to clutter your life up! Stay safe and warm this winter:-)

[@TerranDL]

great vid! very interesting and informative. loved seeing the s55 breakdown

[@Vgk36]

I love this channel so much.