1997 Volvo 850 TURBO WHINES WHEN ENG COLD

1997 VOLVO 850
119,000 MILES • 4 CYL • FWD • AUTOMATIC
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DRYNBERG
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Hi Guys,
What could cause my turbo to whine for first 1-2 min if engine is cold, but no problem if it idles for about 1 in summer and two min in winter. I have flushed the oil, drained it twice and replaced with 5-20 good grade oil, including the auto transmission cooler hose drain.
Thanks,
Dan
Jul 19, 2010 at 3:34 PM
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MHPAUTOS
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Hi there,

Thank you for the donation,

The turbo shaft bearings may be failing, as turbos are a highly balanced component, any small amount of wear in the bearings can start to cause problems, i would get a turbo specialist to check this out, do not attempt to dismantle or work on the turbo your self as you will stand a good chance of doing serious damage to it.

mark (mhpautos)
Jul 19, 2010 at 6:01 PM
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DRYNBERG
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I didn't mention that I'd replaced the turbo last year when the problem started, the whine was exactly the same with the rebuilt turbo that I installed. I think it must be something different, but what?
Jul 20, 2010 at 6:38 AM
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MHPAUTOS
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I would have the oil supply to the turbo checked next.

mark (mhpautos)
Jul 20, 2010 at 6:41 AM