Question about 1994 Chevrolet Astro

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Knock in cold motor

Clatter or knock on cold days usually quits after warm up,doesn't hurt motor performance,doesn't always knock

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Sounds like you have a lifter or two sticking. They act as shock absorbers between the engine cam and end of the valve stem. When the oil is cold and they stick in the compressed mode that leaves a space between the lifter and the valve stem which causes a clicking sound till the oil warms up and the lifter comes unstuck.

Posted on Apr 17, 2014

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Not really an issue as I have already said in the other thread.

Posted on Apr 17, 2014


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