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So this story started in August 2016, i bought non running 2006 BMW M6 with a tranny in a trunk, by the words of the seller it needed transmission.
So i checked the car, a lot of parts were missing like fan, screws,etc... i made him an offer and he agreed.
When i took the car and checked it in my garage i found metal under the intake plenum, and discovered bent valves and hole in the block.
I cant describe my feelings, that i experienced that time. I was crushed.
So i decided to go hardest way. I found an engine with spun rod bearing and i wanted to rebuild it, found one on a craigslist took it home, took it apart and crank was damaged really bad, no one wanted to weld it, but after some research i found couple places that could manage that.
Also my research got me such a person like Troy Jeup, i was debating, to rebuild an engine by myself or give it to the "professional", he got me with a price and warranty, i calculated only parts for S85 will run me about 3500$ he gave me same price plus 2 core engines, that i already had, so in September i shipped him 2 cores and it was suppose to take 2 weeks for rebuilding. It took him 6 month to send me at least something, anyways
I ended up buying a wrecked 2008 M6 that was hit in a front, i took all the parts i needed and i finally installed everything in my 06 M6.
Drove it for 2 days had a huge smile on my face,and that was it.
Check engine light, reduced power, code was cylinder 2 misfire, changed coils, spark plugs, injector, DME - nothing, tested wiring, all good, did compression test, and it was a little lower than other cylinders, i started digging here for a solution and found couple topics with broken valve springs and one with burnt valve, so i took out cylinder head and discovered nothing, spring was good, lifter was good, tested valves for leaks and found that all valves were leaking, so i fixed that problem put all back together and again cylinder 2 missfire P0302, i was mad....
Started all testings all over again and it turned out to be a connector to the coil, replaced it - misfire was gone, took it for a spin and again reduced power engine was not working smooth, checked codes P0304 P0305 wow, i almost burned that car, so i cut 2 other connectors replaced them, took it for a spin again same codes...... changed coils changed ionic module wooala it worked, this is second day that i am enjoying the car, drove 140 miles, and God knows what i can expect next....

Thank u Troy for pushing me from my comfort zone, now i know how to rebuild this engines, and this is not something special, regular engine with 10 cylinders.
 

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Wow bad luck but you certainly dont have any fear

I hope you can enjoy this car
 

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Wow that's a journey! So the real question is how much are you in the hole for a pieced together m6?
 

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Discussion Starter #7
I've got a sneaking suspicion those misfires were ionic modules all along.
i had 7 ionic modules from previous engines, something was just making wiring harness burn, already ordered whole engine wiring harness, will replace it soon.
So you didn't go with Troy's engine?
Troy is probably best story teller i have ever seen in my life, he would be perfect financial advisor, or some huge financing scam guy, i think he is in the wrong business.

Wow bad luck but you certainly dont have any fear

I hope you can enjoy this car
Thank u!
Or i am just stupid lol

Wow that's a journey! So the real question is how much are you in the hole for a pieced together m6?
i think around 19000$ i sold wrecked m6, plus i have some parts, but most money i can get are for parts that Troy never sent me back.

I love the engine, had a lot of cars over 300 probably, but this is the only one which gives that feeling when u r trying to find something to do, just to take it for a spin))))
 

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Thank u Troy for pushing me from my comfort zone, now i know how to rebuild this engines, and this is not something special, regular engine with 10 cylinders.
Hey,

I read your other post about the engines and troy fiasco...
I can tell you that after doing my broken valve spring work and being successful without removing the head - that you are absolutely right, this is a Regular engine with 10 cylinders. It has specific characteristic (smaller tollerances, extra oil pump), but that is all. I do recall some fear-mongering (if I may) while I was in the troubleshooting stages of my misfire issue. The thing that actually annoyed me was how some people praise the s85 motor's complication, and try to make it sound like only a M-Specialist can do any work on this motor. Well, that is not the case at all. Truth is, it's super easy to scare s85 owners and charge them up the *** for any service work.
Congrats and enjoy that hot car. I am enjoying mine, it makes it better to drive knowing I fixed the monster.
 

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I think the problem is that so many people cut corners and dont know how to rebuild a basic engine

If you have the right person your fine

But if you dont well $$$ gone

Bmw motor just means more things for them to stuff up!
 

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i had 7 ionic modules from previous engines, something was just making wiring harness burn, already ordered whole engine wiring harness, will replace it soon.
Oooh was the 06 in a wreck before? Because about the only way that would happen is if it's shorting out somewhere. IIRC all the wiring is shielded in a plastic container in the valley between the two heads.

For what it's worth, I haven't had any issues between our two daily driver m5s
https://www.dropbox.com/sc/qw0dk23rkavuzfr/AAC_fp5nWxDwO6sxj0YKcQcka
 

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Discussion Starter #12 (Edited)
You make me feel ashamed that I get discouraged over my (little) issues with the M5. Wow. Just, wow.
What kind of issues u had?
Hey,

I read your other post about the engines and troy fiasco...
I can tell you that after doing my broken valve spring work and being successful without removing the head - that you are absolutely right, this is a Regular engine with 10 cylinders. It has specific characteristic (smaller tollerances, extra oil pump), but that is all. I do recall some fear-mongering (if I may) while I was in the troubleshooting stages of my misfire issue. The thing that actually annoyed me was how some people praise the s85 motor's complication, and try to make it sound like only a M-Specialist can do any work on this motor. Well, that is not the case at all. Truth is, it's super easy to scare s85 owners and charge them up the *** for any service work.
Congrats and enjoy that hot car. I am enjoying mine, it makes it better to drive knowing I fixed the monster.
Thank u! I read your post probably 14 times, u did it like a surgery, BRAVO, and yes comments were not so pleasant about what u were doing, i do remember Toy scared the crap out of me saying if i will put my old piston rings back in the same block the engine will smoke....OMG i can't believe i bought that BS, how naive was i....
I think the problem is that so many people cut corners and dont know how to rebuild a basic engine

If you have the right person your fine

But if you dont well $$$ gone

Bmw motor just means more things for them to stuff up!
Oooh was the 06 in a wreck before? Because about the only way that would happen is if it's shorting out somewhere. IIRC all the wiring is shielded in a plastic container in the valley between the two heads.

For what it's worth, I haven't had any issues between our two daily driver m5s
https://www.dropbox.com/sc/qw0dk23rkavuzfr/AAC_fp5nWxDwO6sxj0YKcQcka
No mine was not in a wreck, i bought second M6 that was in accident....maybe that's why i had all this problems....

Nice collection!
Mine is more simple lol
 

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I think the problem is that so many people cut corners and dont know how to rebuild a basic engine

If you have the right person your fine

But if you dont well $$$ gone

Bmw motor just means more things for them to stuff up!
yes you are right. People do cut corners, I'm one of them. I cut corners where ever I can see feasible... When driving fast , or when fixing certain things.

The difference with the M5 engine and a "regular" engine, is the owners. Most M5 owners are buisnesmen/artists/medical professionals/hi income professions/etc. where as "regular" engine owners cannot afford an M5 in the first place because they're in much lesser professions, where they earn less is what I mean, and they don't even go into the M5 category. But there is more chance they are mechanically capable due to circumstances, or preference. Only some are fearless and rip into the more expensive or as some think, more complex platform :)
 

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What kind of issues u had?
Soon after buying, Failsafe mode leading to Throttle Actuators (PITA for the first thing to have to do on the car); When changing Transmission Fluid, had a seized fill plug because some "genius" had used steel washers which led to galvanic action and bonding between the aluminum fill plug, the steel washer, and the aluminum casing. Had to drive it to a reliable Indy who removed it with a power chisel and about 45 minutes of effort.

Now I have a no crank, no start condition that (because of winter) has led to the car sitting for about 3.5 months. I'm just starting to work on that.

I knew there would be work on this car - I just needed it to not be for a couple of years due to other things. The way every endeavour on this car leads to complications, I've decided that the Indy (who is known by the local BMW clubs as being quite good on the higher end BMWs) should do my rod bearings - which I'm going to move ahead to this year because I don't really trust that the previous owner's mechanic really did all that he said was done.

So I would say that I've put about 500 kms (max) on the car and that it has sat for 9 months of the last year. Part of my enjoyment of the BMWs I own is when I get to work on them. However, the M5 has so much packed into a small space that the challenges in doing anything on it reduce the enjoyment to the point where I don't know if I want to work on the car anymore.
 

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Thank u! I read your post probably 14 times, u did it like a surgery, BRAVO, and yes comments were not so pleasant about what u were doing, i do remember Toy scared the crap out of me saying if i will put my old piston rings back in the same block the engine will smoke....OMG i can't believe i bought that BS, how naive was i....
Oh he said that about the rings? I'm pretty sure if you put the rings back it will not smoke unless they are already worn down.
On previous engines I rebuilt I would just put them back into the same cylinder. Never any smoke issues.

I think if you are paying someone to rebuild your engine - they rather use all brand new parts, just to be on the safe side and not have to do something twice. Especially when they provide warranty.
This is where DIYers will benefit by 'cutting corners'. Much like I did, I didn't replace ALL valve springs in my head. Only the broke one.
Next valve spring that goes - I will replace that single one again. I know it's doing the job twice (or more times potentially) but it's saving money and making a 'rebuild' cost 1/10th of the cost.
 

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I used to build Honda GX160 engines for karting endurance racing, once managed to get 9 hours out of a 21hp N/A engine before it threw the rod, so I'm fairly savvy with the ins and outs of engines and mechanical theory in general. It's electrics I simply cannot get my head around.
unfortunately, i am not in one of those 'well paid professional' jobs. I make a humble living but survive on very little extra. I am privileged to have a garage, and by garage in the UK we generally mean if you can park the car in and get out of it, it's spacious. I do all my own mechanical work to my car, most likely in the rain on the small brick driveway and I must say so far for the M5 E60 I have found the mechanics of it very easy. I have no special tools, no ramps etc. Just a couple of axle stands and a trolley jack coupled with a mixture of half broken tools. More than half broken now following the brake disc replacement and the seized bolts fiasco.
I do find that a lot of what people say about these cars is scaremongering. And what garages charge to fix them is ridiculous. I once got charged £18.00 to reset the service indicator. then I youtube'd it and raged after I managed to do it myself in 9 seconds flat.
For these reasons, i don't see the point of a warranty, even if I could ever get one.
There is simply nothing better than knowing everything about your car and that it is working exactly as it should.

Well done to you for getting to the bottom of your problems, with both your car and suppliers of parts.

I admire people that do all of their own work on their cars and do it to a very high standard. If the right personality tried to sell me a car and he told me he has completely maintained it himself, I wouldn't be put off.
 
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Discussion Starter #17
Oh he said that about the rings? I'm pretty sure if you put the rings back it will not smoke unless they are already worn down.
On previous engines I rebuilt I would just put them back into the same cylinder. Never any smoke issues.

I think if you are paying someone to rebuild your engine - they rather use all brand new parts, just to be on the safe side and not have to do something twice. Especially when they provide warranty.
This is where DIYers will benefit by 'cutting corners'. Much like I did, I didn't replace ALL valve springs in my head. Only the broke one.
Next valve spring that goes - I will replace that single one again. I know it's doing the job twice (or more times potentially) but it's saving money and making a 'rebuild' cost 1/10th of the cost.
Totally agree with you!

I used to build Honda GX160 engines for karting endurance racing, once managed to get 9 hours out of a 21hp N/A engine before it threw the rod, so I'm fairly savvy with the ins and outs of engines and mechanical theory in general. It's electrics I simply cannot get my head around.
unfortunately, i am not in one of those 'well paid professional' jobs. I make a humble living but survive on very little extra. I am privileged to have a garage, and by garage in the UK we generally mean if you can park the car in and get out of it, it's spacious. I do all my own mechanical work to my car, most likely in the rain on the small brick driveway and I must say so far for the M5 E60 I have found the mechanics of it very easy. I have no special tools, no ramps etc. Just a couple of axle stands and a trolley jack coupled with a mixture of half broken tools. More than half broken now following the brake disc replacement and the seized bolts fiasco.
I do find that a lot of what people say about these cars is scaremongering. And what garages charge to fix them is ridiculous. I once got charged £18.00 to reset the service indicator. then I youtube'd it and raged after I managed to do it myself in 9 seconds flat.
For these reasons, i don't see the point of a warranty, even if I could ever get one.
There is simply nothing better than knowing everything about your car and that it is working exactly as it should.

Well done to you for getting to the bottom of your problems, with both your car and suppliers of parts.

I admire people that do all of their own work on their cars and do it to a very high standard. If the right personality tried to sell me a car and he told me he has completely maintained it himself, I wouldn't be put off.
Mad props to you!
I used to buy cars from UK Copart before, great times. Yeah apartments and houses are tiny there.

Soon after buying, Failsafe mode leading to Throttle Actuators (PITA for the first thing to have to do on the car); When changing Transmission Fluid, had a seized fill plug because some "genius" had used steel washers which led to galvanic action and bonding between the aluminum fill plug, the steel washer, and the aluminum casing. Had to drive it to a reliable Indy who removed it with a power chisel and about 45 minutes of effort.

Now I have a no crank, no start condition that (because of winter) has led to the car sitting for about 3.5 months. I'm just starting to work on that.

I knew there would be work on this car - I just needed it to not be for a couple of years due to other things. The way every endeavour on this car leads to complications, I've decided that the Indy (who is known by the local BMW clubs as being quite good on the higher end BMWs) should do my rod bearings - which I'm going to move ahead to this year because I don't really trust that the previous owner's mechanic really did all that he said was done.

So I would say that I've put about 500 kms (max) on the car and that it has sat for 9 months of the last year. Part of my enjoyment of the BMWs I own is when I get to work on them. However, the M5 has so much packed into a small space that the challenges in doing anything on it reduce the enjoyment to the point where I don't know if I want to work on the car anymore.
Since i repaired it , i had red sign for tranny malfunction, check engine light, and other small things, but i am driving the car as a daily , and i already put 3000 miles, and i am ready for challenges.
I am enjoying my beast, every mile i am putting on it.
For me to own a vehicle and don't drive it it is like to have a super model girlfriend and don't [email protected]#% her lol
 

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So this story started in August 2016, i bought non running 2006 BMW M6 with a tranny in a trunk, by the words of the seller it needed transmission.


Hello M5Board,

Love the chain here and fast-forward to January 2020. I am a nubee to the sight and purchased an S85 for rebuild.

At this point, February finally removed VANOS from cams. I take my time, but really....a 17.5mm, 6pt socket?

Would now like to remove cams so that I can then remove heads.

Any advise on finding cam removal tools: 11 5 241/242/243 or alternate procedure?

Please advise.

Thank you in advance,
P
 

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Question for you guys that have actually removed the VANOS actuators and cylinder heads. Do you really need the BMW special tool 115 352? It seems like it is there simply to prevent the timing chains from slipping or jumping teeth on the crankshaft sprocket. How critical is it to maintain timing mark of the chain relative to crank sprocket and the camshafts?

I've read the procedure in ISTA a few times and don't seem to remember any callout of a timing mark on the chain relative to a the sprocket. I suspect that chain doesn't have any marks. I think the pin that locks the harmonic balancer (crank) preserves the crank orientation and the cam locking tools preserve cam orientation. I'm just checking since on the couple GM engines that I've pulled a heads, for you have to be uber anal about preserving timing chain to sprocket orientation.
 
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