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      11-14-2023, 06:26 PM   #1
E70Apsbmw1977
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e70 white smoke on cold start after rebuild

Hi, I’ve had to go through hell and back in the last 6 weeks, long and short is that I bought a 2011 e70 40d and was fine for a week then engine started making a horrible noise, turned out to be a spun bearings and had picked up on the shells,
So I found someone to do the job but he was extremely busy with other jobs so done mine when he could.. in the end he got the engine skimmed and had to fit new rings, bearings, crankshaft etc , also new tapets and new rocket cover and head gaskets, new cam chain kit
also after everything was built on the engine he had to buy a new flywheel from bmw for £450 because old one was bent and car wouldn’t go into gear, apparently the engine damaged caused the flywheel to slight bend. Anyway after the rebuild engine back in and everything running there was white smoke coming out of the exhaust a little on idle and if you took it up the road it would clear, looking on his diagnostic code reader it said that 2 of the 6 injectors were out of range and were over fuelling, we took it up the road again and the smoke cleared, the smoke didn’t come back till the next morning on first start up same again small lot of smoke then 2 minutes up the road and on to a bigger road foot down and lots of smoke then it cleared again… I didn’t have this problem before the engine rebuild , now engine has been rebuilt I’ve got this issue
He tells me that the injectors have to learn Them selfs for them to run correctly
I’ve paid 8.5k for the car, another 5k bill for engine rebuild 🥲 the garage that sold me it must of new something was wrong
I had noticed that the rocker cover gasket was leaking later that night as smelt like oil , and it was confirmed when engine was rebuild, but did he know about the bearings going? Apparently the oil pump and filter had loads of metal in them on stripping the engine .. I’ve got 2.5 k back from him , he paid me 1.5k after I told him I broke down then another 1k after me telling him of a 4.5 k engine rebuild etc
Now he has blocked me off eBay
Anyhow what’s the thoughts on the white smoke , p. S car runs and drives fine
No hesitation, drives fast , no smoke after it’s cleared
Thanks
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      11-15-2023, 06:57 AM   #2
E70Apsbmw1977
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I know it’s a big write up , same happened today and when accelerating hard it did loose power for a second then back again and smoke cleared
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      11-15-2023, 08:18 AM   #3
E70Apsbmw1977
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On ista and checking smooth running control, when reving up to 3k revs
I get these figures - see picture - no smoke tho?
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      11-15-2023, 02:12 PM   #4
E70Apsbmw1977
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Anyone?
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      11-16-2023, 04:35 PM   #5
E70Apsbmw1977
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      11-16-2023, 06:43 PM   #6
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Looks like you have ISTA. Maybe try recoding all the injectors?
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      11-17-2023, 02:55 AM   #7
E70Apsbmw1977
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Really, why recode them , a lot of work if they were removed and put back in order on rebuild.
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      11-17-2023, 02:56 AM   #8
E70Apsbmw1977
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I would have to remove them again to recode them ?
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      11-17-2023, 08:50 AM   #9
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Quote:
Originally Posted by E70Apsbmw1977 View Post
He tells me that the injectors have to learn Them selfs for them to run correctly
Quote:
Really, why recode them , a lot of work if they were removed and put back in order on rebuild.
Figured it might speed up the "relearn" process is all.
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      11-17-2023, 10:55 AM   #10
E70Apsbmw1977
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Do the injectors actually have to learn or is this a myth?
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      11-17-2023, 12:03 PM   #11
jbash87
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Sounds like a myth to me, honestly, but I do know that new injectors must be coded to the DDE. Not sure what your mechanic did specifically during the rebuild, so I figured it would suggest it.

Last edited by jbash87; 11-17-2023 at 12:09 PM..
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      11-17-2023, 12:04 PM   #12
E70Apsbmw1977
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Ok
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      03-23-2024, 02:08 AM   #13
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Quote:
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Anyone?
You managed to sort this issue mate? I think I have the same issue
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