Hey friends. Recently I have purchased a 87 jeep wagoneer, 4.0 liter in line 6 cylinder engine and since I first started it it has had a belt squeal. There was the typical valve cover gasket leak and oil everywhere.
The squeal is coming from the middle of the engine at the front of the vehicle. I had thought it was the water pump, and the car was having a bit of an overheating issue and the guy left 2 jugs of coolant in the car when it was towed. I replaced the water pump and thermostat and the engine temp normalized, but the squeal was louder than ever.
Today I took it to the car wash. Sprayed degrees error over everything on the engine while it was running. Pulleys, all that. Then I used the pressure washer to spray off all of the gunk that was caked on it.
After I did this, the belt stopped squealing while idling, but when it starts up and the vehicle accelerates it starts squealing again until I let up off the gas and use the brake.
I bought a replacement belt, but haven't thrown it on yet. Could that be the issue? The belts in great shape and a lot of the grease that was on it is gone now, but there could always be more especially on the gears and pulleys.
There is also the chance that it could be the harmonic balancer, but when the belt was off I started it up and it made no noise making me thing the harmonic balancer may be fine.
If anyone has any advice please let me know. Not going to use belt dressing as that would just make a mess.