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😂😂

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!

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.

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

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

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

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

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

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.

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.

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.

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.

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.

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

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

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

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.

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

Tight bearing tolerances + 10w60 is a spicy reliability recipe

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 😆)

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

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 ! :)

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.

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.

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

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.

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

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

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.

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.

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?

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!!

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 .

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.

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

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

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

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

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.👍

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

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

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.

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

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.

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.😩🤔

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.

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

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

Great show

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

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

Heyy I requested this the other day !

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

Really excellent channel presenter, content and editing.

Great as always!

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

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

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

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

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

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

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.

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.

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

7:55 Ahhh yes the rule of "Don't do what Donny don't does" Classic

Those throttle bodies are a work of art. 👌

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

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...

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

I’ve been waiting so long for this video

This is my favorite BMW engine very cool

Nice engine, but there was a more powerful BMW NA engine, it was installed in the McLaren f1 back in the 90s, with 627hp if my memory serves. Great videos as always!

The line about PM in the beginning reminds me of something I heard once (not specifically regarding this engine) - they're great if you keep up on your maintenance, maintenance being a complete rebuild every 5 years or so...

Love the exhaust tunes these things sing

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

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.

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.

Just to point out that BMW made the engine for the McLaren F1 completely in-house. That was a 620 odd hp naturally aspirated V12 I believe so technically that was the most powerful NA engine they ever made for a production car.

I always love the commentary. 😁

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

I'm glad you did one of these, though I never thought I would see you take one apart since they are rare birds. Another rare bird on your channel is the Porsche M28 V8 engine. [hint...] VIDEO great! (oh wait, shit, I got that backwards; I was drinking PBR's tonight, sorry~)

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.

Great video Eric, Der Panzer motor ist kaputt !! ha ha

ps, they do those 20 steps with precision.

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

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

love this show

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

the rod bearings are the unfortunate Achilles heel of these and the subsequent v8 in the e92. these engines sound amazing

Those intake ports gooddaaamnnn

Facts bring the manuals back.

You should ask BMW Nathan for advices!!

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

If only Stop-Leak also made "Stop-Bearing" 😁 "Rod bearing in a bottle! Fix that rattling E92/E60 for good!"

Been waiting for this one 😈😈😈

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

nice video, thanks

As we are looking at a 4 valve engine, the Ford Coyote is a hell of a lot simpler engine... This is just more German over complication

When metal has discoloration it’s a sign of neglected engine, lack of maintenance

its not really apparent until you watch a few tear downs just how complicated a lot of these engines are compared the the trusty old LS engine which is delightfully simple by comparison.