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Read the WELCOME ALL BMWFANATICS post.
Owning an E70 X5///M ( AkA Kopseer )
- Thread starter Gordvisr
- Start date
Gordvisr
Well-known member
Yes she has been a bit of a headache of late, but maybe i am a sucker for punishment. She is going nowhere for now.
Gordvisr
Well-known member
Only thing i can think of, when they were reconditioned ther might have been something in them, carbon or because of play on the shaft. I did not see rub marks on casing. If something did go through, the inlet side should also had dame like this of which there is not.
320d
Member
That was my first though, but looking at the marks it doesn't seem to consistent with running lean. also the exh wheel would normally be light grey/white. you ever look at the wideband sensors? no other signs of running lean?
Bugger
///Member
I'm coming in real late here, and kinda skimmed read through the last few pages to see what you were posting. Your smoking issue? Where is it coming from exactly? The S63 is well know in earlier iterations to have issues with the valve stem seals (which you mentioned), the valve cover gaskets (which you've mentioned), turbo seal issues and myriad other issues.
On my last F10 M5 I had terrible smoking issues, basically went through the same procedure as you. One thing I did which helped with a lot of the smoke issues and the oil in the turbos was to replace these two o-ring gaskets on the turbo inlet housing, where the air intake system meets the turbos, not sure how to describe it, but basically at the front of the turbos as you look into the engine. I replaced those (after having done HPFP gaskets, valve cover gaskets, seals, and a few other things) and it dropped the smoking a lot. But didn't stop it.
But if you're battling to get to the root cause here, you can probably bet a small dog on it being valve stem seals. If they haven't been replaced before on your car, with that mileage, they are probably the reason you're still having issues. My understanding is that it's an engine out job due to the restrictive nature of the engine bay. It took me forever just to get the valve covers off when I did mine. Nearly cost me my marriage.
On my last F10 M5 I had terrible smoking issues, basically went through the same procedure as you. One thing I did which helped with a lot of the smoke issues and the oil in the turbos was to replace these two o-ring gaskets on the turbo inlet housing, where the air intake system meets the turbos, not sure how to describe it, but basically at the front of the turbos as you look into the engine. I replaced those (after having done HPFP gaskets, valve cover gaskets, seals, and a few other things) and it dropped the smoking a lot. But didn't stop it.
But if you're battling to get to the root cause here, you can probably bet a small dog on it being valve stem seals. If they haven't been replaced before on your car, with that mileage, they are probably the reason you're still having issues. My understanding is that it's an engine out job due to the restrictive nature of the engine bay. It took me forever just to get the valve covers off when I did mine. Nearly cost me my marriage.
General.Massacre
///Member
Sorry you having this much headaches with the XM bud.
You've been very thorough, the exhaust blades being damaged wouldn't cause smoking, unless they out of balance and damaged turbo seals.
I am going to agree with @Bugger here that the Valve Stem Seals could be the main culprit, especially as its a common fault on these motors.
The turbo inlet seals actually do make a stark difference and for the prices they sell for, definately worth adding them to your parts list when reinstalling.
In the case of my old M6. The smoking was pretty shocking to say the least. The Valve Stem Seals that were done by Budler made a massive difference to the initial smoking.
The left over smoke I still believe was due to a leaking rings. But we'll never know now.
You have covered pretty much everything here, with the VSS being the only thing left.
Keen to follow the rest of this and watch the result once reinstalled 🤞🏻
Bugger
///Member
He lives!!
General.Massacre
///Member
Ive always favored the dramatic entrance...
And then like a Ninja, disappear in smoke... oh wait... silly me, that was the M6 🤣 🤣 🤣 🤣
Gordvisr
Well-known member
On mine there is no evidence of orings, the XM and M5 compressor housing is diffrent. Not sure if mine takea them or where to install them.
Gordvisr
Well-known member
@Bugger @General.Massacre , thanks for the input gents, every bit helps.
Bugger
///Member
I suspect yours is the original S63 engine, whereas the F10 and the F12/F13 used the S63Tu. The original S63 is based very much more on the N63 of the time. So that could explain the differences. A quick check on ETK though and yours does use the o-rings, item 17 in the image. The part number is 11427578079 (I think). But the most likely outcome is that it's your valve stem seals. It is a known issue on the earlier N63 and S63 engines. Apparently there was a law suit in the US around this issue on both engines.
Gordvisr
Well-known member
So bought the two cores as previously mentioned but some dislexy's jumped in, my cores part # MGT2260SDL but bought MGT2260DSL of which is actually the M5 cores and not the XM. And cant find the XM's cores . Decided that the housing will be sent in to machine out the diffrence in bore. So an upgrade in disguise also happening here.
General.Massacre
///Member
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