Question about 2002 Pontiac Grand Am
A nose developed from the upper rear of engine, changes in tempo as RPM increases, seem to get quieter as engine decelerates. No apparrent miss or roughness, slight decrease in acceleration, however was only drive about 2 miles after on set.
Checked all Pulleys and belt all appear to be ok and tight. no fractures in belt that I can find.
I'd have to hear the noise, but from your description it sounds like it most likely would be in the 'valve train' somewhere. I recommend taking it to qualified garage to be looked at. A bad lifter or rocker arm and/or spring or especially valve work can get a little complicated unless your familiar with them (special tools, etc.). Good luck!
Posted on Dec 14, 2008
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