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I have a squeal from the engine after warm. Only at idle. My engine is the 22rec

Tiny
TRADIO
  • MEMBER
  • 1988 TOYOTA PICKUP
  • 150,000 MILES
If you increase the rpm just a little, it stops. When it goes back to idle, the squeal comes back. When you shut the engine off, the squeal continues until the engine stops turning. If when it's idling the squeal isn't there, you can put the emergency brake on, put it in gear and slowly let out on the clutch and the squeal gets worse. I've tried locating the squeal with a stethoscope but haven't been able to. It kind of sounds like the front of the alternator. The alternator is only a couple months old. If you use a rubber hose as a stethoscope, it seems loudest around the oil filler cap. It idles smoothly, so I don't think it is a vacuum leak.
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Sunday, November 13th, 2011 AT 3:11 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
Try this trick. Take a small cup of water and pour it on the belt when you hear the noise. Let me know if the noise changes.
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Sunday, November 13th, 2011 AT 3:33 AM
Tiny
TRADIO
  • MEMBER
  • 3 POSTS
Jacobandnickolas,
I did what you suggested. After I poured water on the belts, it made a loud chirp and the rpm dropped momentarily. I'm not sure if the rpm dropped and then the chirp or vice versa. The squeal did not seem to change.
Thanks
Tom
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Monday, November 14th, 2011 AT 7:32 PM
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
Sometimes the pulley bearings can fail and squeak along the way. Remove the belt and inspect all the pulleys by hand spinning them. Even though the alternator is new, it may have a bad bearing as well.
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Monday, November 14th, 2011 AT 10:07 PM
Tiny
TRADIO
  • MEMBER
  • 3 POSTS
It turned out to be the water pump. Thanks for all your help.
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Thursday, December 1st, 2011 AT 4:09 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
That will do it. Glad you found the cause.

Take care, and let us know if you have questions in the future.

Joe
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Friday, December 2nd, 2011 AT 5:08 AM

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