1996 Chevy Cavalier Noisy Engine - grind sound.

Tiny
JCURTS75
  • MEMBER
  • 1996 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
I had a really loud, almost grinding sound coming from engine area. The car was due for an oil change so I had it done about 2 weeks ago and the sound was less prevalent. Now it is back.

I have a certified mechanic friend who, 2 wks ago, said the oil might not be lubricating the engine as good as it used to, causing the slight shake and noises. He said I could add something to the car that would help with lubrication (but never found out what it was he was talking about).

I know the O2 sensor is bad, and was wondering what that will do over time? Could that add to the problem? Really any thoughts would be appreciated.
Wednesday, August 18th, 2010 AT 7:30 AM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Grinding is never a good noise, especially from engine, try some Lucas oil stabilizer in oil, if noise goes away, then most likely a bearing, oil pump.
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Wednesday, August 18th, 2010 AT 7:50 AM
Tiny
JCURTS75
  • MEMBER
  • 12 POSTS
Do I just put that in where the oil goes? What's a bearing cost to replace (ballpark)?
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Wednesday, August 18th, 2010 AT 7:52 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Substitute for 1 quart of oil. Check old oil for metal particles.

If main bearing is bad, it is cheaper to replace engine, as block could be damaged.
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Thursday, August 19th, 2010 AT 8:47 AM

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