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Old 06-03-2009, 08:52 PM   #1
2003MercMaraude is on a distinguished road
Join Date: May 2008
Location: So. MD
Posts: 333
Default Tensioner rattle is back -- even with new AC Delco tensioner and belt!

I originally had the infamous belt tensioner rattle w/ an aftermarket plastic pulley POS tensioner and a 780 belt. I replaced with a real AC delco tensioner and the correct -778 belt. The rattle was gone for over a year. Now that I am starting to use the AC again, the extra load at idle of the AC, is making the tensioner rattle loudly again. I don't know how this is possible since I am using the expensive delco tensioner and belt and there are only about 15k miles on them.

I am going to replace the belt and see if that helps, but this is such a bad designed tensioner if that is the case, and it can't handle any belt wear.

The only other thing I can think of is using a shorter than stock belt (shorter than the 778 belt) to force the tensioner to not run out of travel

Man this is annoying


2004 Ford Taurus SEL
2003 Mercury Marauder
1988 Chevy K1500
1976 Pontiac Firebird


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