Hello, The belts off of my Iroc snapped off the other day, and i've been trying to figure out what the size of the belts are. I was looking at older posts and on one thread vetteoz posted a picture of a belt diagram, and that's exactly how i had it set up, but I cant find the size of the belts anywhere online. This is the thread where the picture was posted on: https://www.thirdgen.org/forums/tech...t-routing.html

Thank you!

 

I looked it up on Napa's website.....appears to change on whether you have TPI or carb, ac or no ac, and if auto or manual. You didn't give that info so we can't give you the exact sizes that "should" be on there. Things change in 30 years.
http://www.napaonline.com/Catalog/Re...808344%2026286

 

Thanks for the link! When I looked at autozone/oreillys they only seem to specify whether or not the belts are intended for engines with an AC. I'm running an automatic 305 TPI with AC. I lost the belts i highlighted in red which i think is the alternator/waterpump, and the blue one that might be the water pump, a/c and p/s. (This is my first car that i've started doing my own work on so i'm not 100% sure what everything is)

 

Yep, you identified them correctly.

 

Acc. Belt - Main - 5PK1140 (14088681)
Air Pump - 15330 (14091516) .38 X 33.0
P/S - 15400 (14033905) .38 X 40.0
A/C - 15550 (14081276) .38 X 55.5