Question about 2000 Ford Expedition
I have changed tensioner pulleys, idler pulleys, inspected the crank, a/c, power steering and alternator grooved pulleys thinking there might be burrs eating the main serpentine drive belt but they all appear to be fine. Alignment of all pulleys and both belts are good. I don't know what to look for now. Any suggestions
What you describe is an indication that the serpentine belt is under a load that it is not designed to operate under. Either the supercharger is suffering impellor interference at rpms or the bearings are not spinning freely or the boost at rpms is producing excessive load on the belt. Take it to a speed shop that handles super chargers and can do a dyno test to see exactly what is happening under rpm and see if you can get a better quality belt to do the job.
Posted on Feb 10, 2014
Testimonial: "Thanks Bill. Hard to find a good speed shop around here! I run Gator back belts. Haven't found anything better. Do they make a heavier duty belt? This problem started after I had it dyno tuned. The main pulley system is an 8 groove set up. The motor puts out 400bhp and 400 torque. The 8 rib belt should handle this no problem. The supercharger runs off of the alternator with a 6 rib belt and I have not had a problem with that. I'm looking into finding a different set up to power the SC. Any suggestions?"
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Posted on Jan 02, 2017
could be the alternator, water pump
take the belt and spin all the pulleys and listen for noise and make sure they turn smoothly
another trick is to take a can of wd40 or equivalent and spray the bearings 1 at a time till the noise goes away or quiets down
Posted on May 16, 2009
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