Sqeaky fan belt

[Jim_Phillips]

The fan belts on my truck were changed about a month ago by the PO. They have an audible sqeak which is getting worse. Should I tighten the belts or slacken them off to sort out the problem. Any suggestions? Thanks for any advice, Jim

 

[Twiggles]

How much slack to the belts have? Belts will generally seat themselves and need to be re-tightened after some time. Mine started making noise about 150 miles after replacing them. A simple tightening did the trick and my truck is as quiet as can be!

 

[SeanAndHis80]

OEM belts? Are the pulleys glazed? If only you had a FSM to check what the proper tension is ...if no one gets back to you sooner - I'll look it up tonight for you.

 

[NLXTACY]

Most likely the PO did not use OEM belts. Cogged belts cause squeaking. I made that mistake once on a temporary fix. Drove me nuts.

 

[Jim_Phillips]

The PO used OEM everything - the belts are fine. I should check for glazing I suppose. It wouldn't hurt of give them a sanding if that's the recommended solution?

Sean, knowing the correct tension wouldn't help 'cos I don't have the SST for shecking the tension. Hmmmm... maybe the fish scales would give enough of a guide..

I have done about 700 miles since the belts were changed and the squeal wasn't there at the start. I rekon that the belts may need tightening. I will do that tomorrow and report back. If anyone else has ideas in the meantime, I am all eyes.

 

[Twiggles]

My bet is still on the tension... without a guage to measue, I just gusstimated at 1/4 - 1/2 inch deflection, that got me in the ballpark.