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Old 03-02-2014, 10:40 PM
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87 jeep squealing HELP!!

Hey everyone i have a 87 jeep 4.2 no A/C with 2 V belts. i have this awful squeal coming from my engine bay. The noise starts only after i have been driving for about 5 min. then stops shortly after i come to a stop. Sounds just like a belt squeal. So i changed the belts bought some goodyear gatorback quality belts. cleaned the pulleys with some carb clean, and tightened the crap out of the belts w/ a pry bar. After all that the squeal is still there. The truck does not make any noise at start up, and squeal only happens when im driving for a little..... anyone have any ideas what this could be????
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Old 03-02-2014, 11:38 PM   #2
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Possible water pump...... idler pulley..... use a screwdriver/stethoscope to isolate the noise while running.

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Old 03-03-2014, 04:18 PM   #3
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If your belts are too tight you will ruin the bearings in the Alt. and the water pump, you may have them too tight! Check for a leak on the gasket under the Carb., air passing over the gasket can make that sound.
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Old 03-03-2014, 04:44 PM
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Thank you guys for your feedback I'll check the water pump and carb gasket and get back to you guys.... Thanks again
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Old 03-03-2014, 04:51 PM   #5
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my 88 did the same thing I changed the alternator and now its fixed
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