Jon Ison
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| posted on 22/3/07 at 09:52 PM |
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Any BMW experts out there ?
2nd hand info, not seen the car yet but my son been on phone and describes the following........
"big puff of smoke"
He as seen this about 3 times, different driving conditions each time, just described as a " large puff of smoke" car is running fine, no
loss of power, no pumping up of water hoses, no loss of fluids.......temperatures normal......
E46 325 2.5 24v M54 engine on a W plate.
Anything I should be looking at, any ideas ?
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mark chandler
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| posted on 22/3/07 at 10:42 PM |
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I think at that age it may be the engine with Nikasil coating on the bores, lots of trouble with the coating being erroded with unleaded fuel, all
going well then suddenly clouds of smoke as the engine fails.
BMW used to cover this under warranty but at that age its all history....
Its not an uncommon problem, early V8 jags had the same thing, you look on ebay lots have new factory engines at some point.
Hope it does not apply to your son. 
Regards Mark
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russbost
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| posted on 22/3/07 at 10:43 PM |
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Is it high mileage, there is a known problem with Bmw's chewing up bores, something to do with sulphur in the fuel?
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zetec
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| posted on 23/3/07 at 07:14 AM |
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I had one of those 2.5 BMWs which was fixed under warranty by BMW, car was 5 years old with 80,000 miles!
I thought the problem had been solved by about 1998 and they had used a new lining finish. I had no smoke, used very little oil but the idle had
become slightly rough (most people would not notice). I might be wrong but I would have thought the car was built when the problem had been fixed, and
would have thought the smoking would have been all the time. I would have thought it might be a problem with the breather system perhaps...
" I only registered to look at the pictures, now I'm stuck with this username for the rest of my life!"
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stevebubs
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| posted on 23/3/07 at 11:16 AM |
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quote:
Originally posted by Jon Ison
2nd hand info, not seen the car yet but my son been on phone and describes the following........
"big puff of smoke"
He as seen this about 3 times, different driving conditions each time, just described as a " large puff of smoke" car is running fine, no
loss of power, no pumping up of water hoses, no loss of fluids.......temperatures normal......
E46 325 2.5 24v M54 engine on a W plate.
Anything I should be looking at, any ideas ?
If out of the exhaust then I would suspect Bore wear. BMW had serious problems with the old Nikasil linings. Still not convinced they can produce a
reliable Alusil engine, either.
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stevebubs
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| posted on 23/3/07 at 11:17 AM |
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quote:
Originally posted by russbost
Is it high mileage, there is a known problem with Bmw's chewing up bores, something to do with sulphur in the fuel?
Lack of sulphur which is why the problem was bigger in the US...sulphur was acting as a lubricant...take it away and the nikasil bores wore away
faster...
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stevebubs
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| posted on 23/3/07 at 11:17 AM |
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PS I used to own an E34 530 v8 incase anyone is wondering about my answers....
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stevebubs
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| posted on 23/3/07 at 11:18 AM |
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As the car should still be under warranty, I'd get it into the local dealership. If not, then steer well clear and use a specialist.
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Jon Ison
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| posted on 26/3/07 at 04:11 PM |
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Thanks for scaring the poop out of our "youngen".........
Just had a mail from him, blocked breather hose........phew.....
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