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What could cause your 98 Grand Am GT 3100 engine to knocks startup but stop after warming up?

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2004-11-20 10:54:45
2004-11-20 10:54:45

A lot of things could cause this, which might not really be a problem. Multi viscosity oils are thin when cold, and thicken as they become warm. If the engine is being operated at or near the red line, the sump will be starved for oil, and so will the bearings, and all that is doing is burning up the bearings- they are getting hot due to lack of oil from two counts- heat from friction, and overheating because of the lack of cooling from not having sufficient amount of oil being pumped through the engine. Regular oil changes, and a good quality oil helps also.

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