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High Oil Level Curing Noise Valvetrain 900 1991

posted by  jmiles on  Mon Jan 23 08:33 CST 2006
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last visit: Sat Feb 21 01:30 CST 2009
[RELATED]

Hi,

1991 940 Turbo with 365,000 kms - very noisy valvetrain when idling.
I made a mistake and ended up filling it with a bit too much oil (measure about a 1/4 inch above the full mark on the dip stick)

Strangely, now the valvetrain noise has dropped considerably!

Is this indicative of an oil pump that is on it's way out?

I've been running it with Mobil 1 synthetic grade 10W30 (though overkill - my thought is lubrication of the turbo has gotta be tough on regular oil)

Thanks again for all your help!

John
--
91 940 Turbo - Cold air intake and 16" Hydras






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