ZJ Belt Squeak

[AJeepZJ]

I dont think it was removed, I think i doubled tapped it on my phone and then driod freaked....

AJ, I hear your words, read the print, but I still think it is the water pump....

Water pump seems plausible.

I'm leaning towards this as well since it seems to go away after 10-15min..... engine heats up, tstat opens, less load on impeller. Due to its location in the block, it could definitely sound like its coming from the compressor if you're standing over the motor.

AJ, what happens to the noise if you turn the AC on full blast right after you start up?

The squeak is present, unless you want to know whether the frequency of the squeak changes. Squeak more, less, or unchanged - but I will find out.

[cico7]

My dad had a Cherokee sport with 4L that started squeeking. He thought it was the pulley. He bought and installed a new pully. It still squealed.
I asked why they didnt replace the water pump....cause it still squeaked. He had the pump replaced, squeek (squeak) gone.

[Matt]

The squeak is present, unless you want to know whether the frequency of the squeak changes. Squeak more, less, or unchanged - but I will find out.

If the squeak doesn't change significantly when the AC compressor clutch engages, then its probably not the compressor. Engaged vs disengaged is a different set of bearings and also rules out the clutch itself. So that would be a good test for peace of mind.

Expect the frequency of the squeak to change though because engaging the AC clutch will cause a fluctuation in engine RPM and load on the belt.

Let us know how it sounds.

[AJeepZJ]

I'll repost this - it didn't load correctly.

When the compressor engages - it squeaks louder. When I started the vehicle with a/c max it was loud - I tested it while driving and any time i turn on the A/C it comes on. It's my AC Compressor.

[superacerc]

Sounds like the bearings on the Compressor.

[Matt]

yup... that sucks

May i suggest: Dorman 34178. $30