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Old 06-03-2009, 08:52 PM   #1
2003MercMaraude
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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

...
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