Engine Size: 3.5L
This vehicle has one belt for the a/c compressor with an idler pulley and bolt tensioner on it. Last winter, the idler pulley started to squeak, and it started to chew up the belt. I replaced the idler pulley and bracket, assuming that it was worn. It kept chewing up the belt - the front side of the belt wears off - until I tightened the belt a little more than should have been necessary. The belt finally lasted for around 5 months, but it is being chewed up again. One section has worn off in the past few weeks, presumably because the a/c is now in use.
Another issue - the a/c blows hot in prolonged slow, heavy traffic. It cools when the traffic starts moving again. I checked the condenser, and it is clean and unobstructed.
Does this sound like a new compressor? I would prefer not to spend the time and money on a compressor if something else could be causing the problem, but I don't know what else it could be.
The other belt, that drives the alternator and power steering is fine. Everything looks straight on the a/c compressor and pulley.
Do the condenser fans work? While it is blowing hot, does the compressor stay engaged?
Wearing the edge off of a belt is usually because the pulleys aren't all in the same plane. It could be any of them.
Corrosion on the electrical connection to the a/c cooling fan was the cause of the problem at slow speeds. Cleaning off the connections, and some dielectric grease, has solved that problem for now.
The belt has found a comfortable equilibrium for now. It sheared off the front section, so that what used to be a four rib belt is now three. It rides on the front three grooves of the crankshaft pulley and the back three of the compressor pulley. My buddy tells me to leave it as long as it is working (in the past, it has chewed up the whole belt pretty quickly, but this time it seems to have been more surgical). So, I am going to see how long it lasts, and decide later whether to replace the one of the pulleys.
I suspect the new idler pulley for the belt issue, like maybe a spacer missing so not perfectly lined up.
Good find on the fan issue, most of us here figured that it was an air flow issue.
We've updated our forums!
Click here to visit the new forum
Copyright © 2016 Arizona Mobile Air Inc.