Question about 2002 Oldsmobile Alero
That tricking noise is common on the 3.4 gm engine's. It's called piston slap, you get it most of the time on first start or when you turn the car off and it just cooled enough for the pistons contract again.
There is nothing we can do about it, with the newer engines being built with higher tolerance you get annoying noise.
Best thing to do is to do oil and filter changes every 3000 miles, and warming up the car about 3 min before driving off.
The way you engine was made, you don't have to wait since there is tolerance for expansion but your going to wear out the cylinder quicker.
I find that adding Lucas Oil treatment with every oil change has eliminated the piston slap from my wife's Montana. Good luck and hope this helps.
Posted on Apr 22, 2009
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Posted on Jan 02, 2017
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