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Knock sensor?1990 745TI (141,000) 700

posted by  Volvo From Heck on  Wed Jan 2 05:05 CST 2008
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last visit: Mon Oct 13 20:56 CST 2014
[RELATED]

Piston slap in Volvo motors is annoying but nothing to worry about. The 245 beater I bought 6 years ago with 123k sounded like a diesel on start up, then would quiet down fully warm. It has 241k now and sounds exactly the same. Here is a simple test for oil pressure without a gauge, provided your light works--engine completely cold--start it--does the light go out right away--shut the motor off--turn the key back to ignition on--watch the light--does it take a few seconds for it to come on due to residule pressure in the sytem? if yes, you have good enough pressure and the likelyhood of a bad crankshaft bearing is remote.






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