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740 valve noise/piston slap 700

uid 13809's pic
posted by  Alex Z on  Mon Jul 12 11:31 CST 2004
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last visit: Thu Oct 3 04:30 CST 2013
[RELATED]

That oil is probably way too thick. Go for 5w30 or 10w30. If the noise goes away after a while you've probably got worn hydraulic lifers. Thinner oil should pump up faster in colder temperatures. If the noise doesn't go away, it could be the piston slap that's oh so common on the red block motors. If the noise doesn't change with engine speed, it's probably the fuel injectors.

--
alex

'89 765T, 175,4xx mi






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