Replaced all belts about 6mos. ago, and i can't seem to get rid of the noise of squeaking belts.I tried Belt Dressing,but to no avail.Any Ideas?

I shut mine up with a squirt of black magic tire dressing.

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Thanks i will give it a try.

I had new belts put on my 380SE( 5 belts total) The one that occasionally makes a banshee squealing is the A/C compressor belt.I have to loosen the pulley and increase tension to stop the squealling. Have had to do this a couple of times since evidently I just can't put enough tension and tighten singlehandedly, so will solicit wife's help next time or might hae to get new pulley.

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I had this after replacing the belt on a 300E. Except we discovered that fan wasn't quite on properly. On the AC pulley the belt was one notch off centre. As mentioned above, make sure the belt sits properly on each pulley.

There is another old fashined way of stopping screeching. Crayon wax based.

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Gary: The tensioner for the AC pulley has 2 flat spots on it to put an open-end wrench on, to tighten the belt, then tighten the pivot bolt with the other. If you don't totally loosen the pivot bolt, you should be able to tighten the belt, have the tensioner stay in place reasonably well while you then tighten the bolt. I think the flat spots on the tensioner are around 18-20mm across the flats IIRC.
Gilly

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