>>>The turbos fail even when using fully synthetic oil.
>>
[quoted text clipped - 4 lines]
>Is it possible that BMW doesn't water-cool its turbos?
>And provide after-run cooling?

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Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net
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Hi All, (first ever post)
E46 320d turbo failure much more common than BMW would like to admit. They
now claim that cars post 2003 are not affected.
Many other manufacturers use the same (-ish) Garrett GT17 49V unit on their
cars without nearly the same failure rate. None are water cooled.
When mine went, there was no smoke at all. The only symptom was no boost
pressure during acceleration.
When replacing the turbo, the exhaust and catalytic converter needed
replacing too. Had this not been under warranty, the bill would have been
close to £2,000. Also, the ECU needs to be updated with a different map
after a replacement turbo.
Strangely, BMW do not recommend an oil + filter change after a turbo
failure. I think that an oil + filter change is rather fundamental after
such an event.
I think that the problem is with both the extended drain for the oil service
and, (IMHO), the use of Castrol oils which BMW and Audi are paid to endorse,
and owners / drivers not knowing or bothering with the end of journey cool
down where the engine should be left to tick over for at least 30 seconds
before switching the engine off, longer if the drive was fast and of any
significant length.
Also, the engine should not be revved high (loaded or unloaded) until the
oil has warmed. NEVER rev any turbo engine then turn off the ignition
straight away.
Best regards
David
Richard - 25 Oct 2006 13:05 GMT
> Hi All, (first ever post)
>
> E46 320d turbo failure much more common than BMW would like to admit. They
> now claim that cars post 2003 are not affected.
you may find the link below of interest, the bottom of the thread
showing the crankcase breather, could this be the problem?
http://www.bmwland.co.uk/talker/viewtopic.php?t=36931&postdays=0&postorder=asc&s
tart=15
Richard - 25 Oct 2006 13:06 GMT
> Hi All, (first ever post)
>
> E46 320d turbo failure much more common than BMW would like to admit. They
> now claim that cars post 2003 are not affected.
you may find the link below of interest, the bottom of the thread
showing the crankcase breather, could this be the problem?
http://www.bmwland.co.uk/talker/viewtopic.php?t=36931&postdays=0&postorder=asc&s
tart=15