Serpentine belt question

565bbchevy

565bbchevy

Geezer
Aug 8, 2011
5,357
2,108
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Michigan
#1
So I am adding a serpentine belt to my set up to drive my AC compressor and it will only be running from the compressor to the pulley on the crankshaft so my belt length will be approx. 54" and I am wondering do I need an idler pulley for this length.
I do have an adjustment to where I can tighten the belt.

20180804_190632_resized-jpg.94325
 
Last edited:
pontiacgp

pontiacgp

Canadian Prime Minister
Mar 31, 2006
22,858
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Kitchener, Ontario
#2
It looks like you have a 7 ribbed A/C pulley so with 7 rib belt I don't think you'll need an idle pulley
 
565bbchevy

565bbchevy

Geezer
Aug 8, 2011
5,357
2,108
113
Michigan
#3
It looks like you have a 7 ribbed A/C pulley so with 7 rib belt I don't think you'll need an idle pulley
The crank pulley is a 6 rib and the compressor is a 7 rib, I was told by Vintage Air that they use a 7 groove to give options for alignment of a 6 groove belt.
 
pontiacgp

pontiacgp

Canadian Prime Minister
Mar 31, 2006
22,858
3,817
113
Kitchener, Ontario
#4
even with a 6 rib I don't think you are having a problem....with all this talk about ribs I'm getting hungry...:)
 

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