Correct Belt Length

[cdurbin]

I've been having cooling issues while sitting in traffic and have tried everything except replacing the pullies. I found out from the previous owner that it has UDP's so I bought a set of stock pulleys on Ebay. I plan to change them out this weekend but I'm not sure what belt length I need. It's a 1991 Lx with A/C, the smog pump removed completely, and the remaining pulleys will be stock.
I found a routing chart online that calls for a 84.5" belt. Is that the correct length?
Thanks

 

[jcgafford]

yup! for the 5.0 motor it is
http://www.autozone.com/autozone/pa...Z8gcul?itemIdentifier=150375_121244_8238_6774

 

[cdurbin]

yup! for the 5.0 motor it is
http://www.autozone.com/autozone/pa...Z8gcul?itemIdentifier=150375_121244_8238_6774

Sweet, Thanks for the confirmation and the link!
I sure appreciate all the wisdom you guys share on here.

 

[boostfrk]

A good double check I've heard is to take a piece of string, wrap it around the pulleys per the belt routing and then measure it.

 

[pissedoff92]

Dont follow the string technique too closely though, I screwed up about 3 times and ended up just getting lucky. But I run a wierd belt setup.

 

[David Pepiton]

the string setup works fine just keep in mind its inside belt diameter not outside. if you dont loosen the tensioner you will want to subtract about 3/4 of an inch

 

[cdurbin]

Well, the 84.5" belt was just a little too short. I could have made it work but I would have had to pry it on and I didn't want the extra tension on my alternator so I went with a longer belt. I ended up using a 85.8" belt. I think the other was too short becuase of the alternator pulley. I have an upgraded 130amp alternator on there now and the pulley looks larger than the stock one. Anyway, I got it all put back together and running like a champ. Thanks for all the help.