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Discussion Starter · #1 ·
My serpentine belt came off and I think the idle pulley did as well but when I try to put the belt on it is way too long. Not sure exactly where the idle pulley is supposed to attach to. Its an '88 4.2l straight 6.
 

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it bolts to the front of the a/c mount. looking from the front it is on the left and is the top right hand bolt hole closest to the thermostat. when bolted on, the idler sits on top of the sepentine belt.
 

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google "jeep 4.2 belt routing". there are many sites with diagrams. chrysler has one with 12 diagrams or so.
 

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ok now im looking at all these pictures and im wondering why my power steering resevoir is mounted to the fan shround and not the pump. any one else ever seen that
 

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mine is nounted to the fan shroud. look at my second pic. mine is a 4.0 ho
 

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Have a '92 yj, and when the temperature heads below zero the belt/fan area on the jeep makes a screeching sound until the jeep warms up. I was told this was the idoler pulley not having compatible grease for the cold. But I can't help but think there is more to this the. Just a pulley. Any thoughts?

Could it be a failing thermo-fan assembly?
 

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spray a little belt dressing on the belt. i just did mine. we were in the teens for the first time in years. it helped mine.
 

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MMata77 said:
ok now im looking at all these pictures and im wondering why my power steering resevoir is mounted to the fan shround and not the pump. any one else ever seen that
NAVYCHIEF said:
spray a little belt dressing on the belt. i just did mine. we were in the teens for the first time in years. it helped mine.
I have done the belt dressing route on my old belt with little elimination for the squeal. I had my belt replaced about 3 years ago with a Kevlar one that no longer needed dressing, and at the time had the shop look at everything they couldn't find any problems. And yet when the temptation gets below -10 something squeals. Some have speculated that the clutch on the fan requires changing, but then would it have issues with over cooling during winter? It is crazy.
 

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Check out harmonic balancer if it's ok. Mine went bad not a whole lot about 1/16" or less and it started making squeaking noise. I thought it was an alternator bearing, pump, idler, you name it. At the end of the day check out your belt for excessive wear or glossy spots, that'd be a sign.
 
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