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My 3.0 has had a squealing belt since the time I purchased it. Bought a new valucraft(?) belt, duralast idler pulley and bearing and duralast tensioner. Stayed quiet for a while, but came back.
Tensioner had gone crooked, was basically coming apart. Chucked it in the bin and bought a motorcraft tensioner assembly. That's still OK. Bought a new belt, a poly rib 'quiet belt'. Damn thing still squeals like a pig being branded and I can't figure out why for the life of me. Lately I've been ignoring it because I'm tired of chasing my tail.
Food for thought.
- Look around the belt for signs of oil, grease, coolant or some other contamination. Chemicals from these fluids not only cause the belt's material to deteriorate but also interfere with the way it operates. If your belt is contaminated with fluid, find the source of the problem and fix it before replacing the belt.
- Remove the belt and manually rotate the different pulleys by hand. They all should turn smoothly and quietly. The idler pulley should spin freely as well.
- Using a straightedge, check that the pulleys align with each other. A pulley that varies over a 1/4-inch (1/8-inch on engines with pulleys close together) means it's not mounted correctly, has become loose, or has a bent bracket.
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North Industries
Las Vegas, Nevada 89118
Web http://www.12degnorth.com
