by danski1938 on September 6th, 2008

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What sound is made if a engine bearing is bad, when i start my 1938 pontiac straight 6 there is a high pitch noise after the car is running for a while the sound goes away.

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by Im Alec has abandoned this account on January 25th, 2009
Sounds more like the auxiliary belt slipping. Usually it drives tha alternator, which is putting an unusually high load on it to replace the energy used by the starter motor.
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by ronsky on January 25th, 2009
could be a blocked oil pick up pipe filter the small mesh filter on the pickup pipe can get blocked so you get a screaming sound till the oil gets warm it then dissapears as the oil gets thinner it get through the filter better
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by The Chief on September 10th, 2008
A bearing could make that sound. It could also make a rumbling noise.

What you describe sounds more like a belt slipping, though.
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- Go to Harbor Freight & buy their "Mechanics Stethoscope". Use it like the Dr. does moving it around until U locate the exact place the noise is greatest at. Be careful not to put it in the moving parts, just close. Generators were notorious for this kind of noise either from their bushings or brushes & don't forget the throw out bearing (these were often greaseable). John
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  by Moosemose on September 10th, 2008
- I hadn't though of that.
  .
  I have a steel rod somewhere that I use for that. Hold one end on a spot near the suspected source of the noise and place the other end on the side of your head. Bone conduction will take the sound to the auditory nerves and you can hear ticks, tapping, squeals, and so forth. Move the rod around a little bit and you can find the source by loudness. I've known mechanics who use a breaker bar from a wrench set like this.
  .
  But like Moosemose said...be careful! You DON'T want it to get caught up in moving parts like belts, pulleys, and fans. Baaaaaad juju!
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  by The Chief on September 11th, 2008
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You're reading What sound is made if a engine bearing is bad, when i start my 1938 pontiac straight 6 there is a high pitch noise after the car is running for a while the sound goes away.

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What sound is made if a engine bearing is bad, when i start my 1938 pontiac straight 6 there is a high pitch noise after the car is running for a while the sound goes away.

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What sound is made if a engine bearing is bad, when i start my 1938 pontiac straight 6 there is a high pitch noise after the car is running for a while the sound goes away.

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