2002 Pontiac Grand Prix

2002 PONTIAC GRAND PRIX

77,000 MILES • 6 CYL • FWD • AUTOMATIC

DILLOWLAKELAND

MEMBER
4 POSTS
FOLLOW

I hear a grinding noise in my engine when i reach about 5000 rpm and it only happens when my air conditioner is on. it is hard to describe the grinding noise but maybe you have run into a similar problem before, thanks for your help!!!

Dec 10, 2008 at 11:24 PM

JACOBANDNICKOLAS

CAR REPAIR CONTRIBUTOR
110,190 POSTS

Hi:
If it only happens with the AC on at 5K RPM's, I'm going to say it has something to do the the AC compressor. 5K RPM's is somewhat high and if the AC clutch is engaged and has a bearing starting to go bad, that is where the noise may be coming from.

What is red line on the vehicle?

Joe

Dec 14, 2008 at 1:11 PM

DILLOWLAKELAND

MEMBER
4 POSTS

Thanks, that gives me a great place to start. The red line
is 6k.

Dec 14, 2008 at 11:10 PM

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