Peter Frederick wrote:
Marshall:
I know of two turbos that have failed in exactly that fashion, one on
my car and one on someone else's. Both showed serious lack of boost at
low speed cold and both showed excessive oil consumption. One (the MB
one) blew blue smoke on acceleration. My volvo TD didn't, but the
exhaust was full of coked oil and actually caught fire after the turbo
was replaced (quite an experience, having burning carbon blow out the
exhaust!).
The failure is not primarily a seal failure, it's a bearing failure.
They do wear out eventually, and bad bearings usually result in seal
failure before the turbo stops working altogether.
I understand that the failure is a bearing failure, but every one I know
of seems to follow trap problems (dumping ceramic particles into the
turbo). 602 turbos and the ones from '90s 603 engines (that don't have
traps) just don't begin to fail 'til they have 400-500kmi on them
(unless you NEVER change the oil). These later turbo are just as trouble
free as the ones on OM617.95 engines were (and they almost never failed
unless you messed with them).
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5
turbo 237kmi
