1966 390 with AC. Belt replacement

[adamkeyser]

I get some squealing at start up, sometimes goes away quickly, other times only after driving for awhile... sometimes comes back when gassing from a dead stop. I can't tell exactly which size I need or exactly which belt needs to be replaced. I see things online saying it has 4 belts but I only see 2 at the front of the engine (guessing fan and something else). Any thoughts? Looking on rock auto to get replacement. Thanks!

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[Patrick 6365]

You should have a 3 belt set unless something has been changed? An A/C car vs a non A/C car, the belt size is of a different length, as I recall. Squealing is usually an indicator of loose belt tension and not adjusted "tight " enough, usually the one going around the alternator. Hope this helps ......

 

[adamkeyser]

Awesome thank you! Yeah when I first got it and had it looked over they said it was tightened as much as they could so now I know it's replacement time

 

[Patrick 6365]

Sure thing. When new ones are installed, and broken in after driven about 100 miles, the "tightness" requires to be re-checked. They'll stretch a bit and squeal again and require a re-adjustment. Final tightness/adjustment should be about a 1/2" or so of play when you grab it up/down or side to side.