1991 Other Oldsmobile Models Noises

Tiny
KARI_C
  • MEMBER
  • 1991 OLDSMOBILE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 154,530 MILES
My car makes like a grinding noise under the hood. I've tried changing the power steering pump and the water pump and it still makes the noise. It will stop when I push on the gas, but as soon as I let off the gas or touch the breaks it will start once again. I don't know what else to do. I'm running low on options. Help.
Monday, March 24th, 2008 AT 3:07 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If its not coming from the AC Compressor-I would say it has to do with possibly the timing chain being loose/ stretch-the noise decrease when under acceleration and diminish without acc. Or could be the serpentine belt tensioner or the alternator bearing-

Get a stethoscope or a small garden hose and probe around the areas I've mentioned while duplicating the problem.
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Monday, March 24th, 2008 AT 4:22 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Remove the drive belt and start the car (only for a minute, no water pump), see if the noise is still there, if so then it is the engine, if not it is an accessory. Turn each thing on the front of the engine by hand to see if you can feel a bad bearing or maybe even hear it
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Tuesday, March 25th, 2008 AT 7:45 AM

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