I HAVE A SQUEAL FROM THE ENGINE AFTER WARM. ONLY AT IDLE. MY ENGINE IS THE 22REC
1988 Toyota Pickup
November, 13, 2011 AT 3:11 AM
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.
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.
November, 14, 2011 AT 7:32 PM
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.
November, 14, 2011 AT 10:07 PM
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.
December, 1, 2011 AT 4:09 PM
It turned out to be the water pump. Thanks for all your help.
December, 2, 2011 AT 5:08 AM
That will do it. Glad you found the cause.
Take care, and let us know if you have questions in the future.