Question about 2000 Chevrolet Blazer

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When ever i first start my blazer up i can hear tapping on my motor then it fades away do you know what it can be?

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If it fades shortly after start-up it is the valve lifters. These are hydraulically operated by engine oil.They are designed to "expand" as internal pressure increases.(basically 2 little tubes that fit over each other to form a small cylinder) This is to minimise the clearance between the rocker arms and valves to normal.Noisy valves/lifters are an indication of wear within the engine. The only real solution is replacement of the lifters. It entails stripping both the front end and the top of the engine.

Posted on May 29, 2010

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Sounds like the lifters are tapping until the oil pump get oil up to them. Could be oil leaking out the top of the motor or your lifters may need adjusted.

Posted on May 29, 2010

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