TJ Engine squeak with revs

[Rocket55]

Hoping someone can help me out.

Ive got a 2001 TJ that develops a squeak as the revs rise. It sounds like something in the belt area, I'm guessing at an idler or tensioner bearing. When cold or coldish it starts squeaking/screaming at about 3000rpm, as the temp rises, and by temp i mean radiant heat in all things metal as opposed to water temp it starts squeaking at about 2400rpm.

This is most noticeable when off road, heaps of heat and it equals at about 2400, once you get going on the road again and get some good airflow through it after time it'll start squaring at about 2700-2800rpm

[sht50]

First of all I would pull the belt and see if it goes away. Whilst the belt is off check the condition of it (cracks,oil soaked Yada Yada) if it does go away give everything a spin ( idler, tensioner , water pump, a/c , you get the idea) and feel for any notchyness or movement. You have to rule out all of that before going any further

[technickster]

You can test the belt quickly by spraying some wd40 on it when it's running and see if the noise goes away.


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[Rocket55]

Thanks for the replies. Ill pull the belt off it on Friday and see what i find.

[anotherblacktj]

Hope you don't have my issue

[Rocket55]

Is that the engine mount?

[Rocket55]

I pulled the belt off the other day and the tensioner bearing is catus. Another one should be here tomorrow, then off we go again.