black89gt

i did the smog pump bypass and i got the right size shorter belt. It was a 77inch belt and it fit but it was tight. and after a few days, i checked the belt again and that damn thing stretched out and the part of the belt from the water pump and hte a/c were rubbing so i had to change back to the stock belt. Does anyone know where i can get the smog pump replacment pulley and stuff? cause i dont wannag o through all taht trouble again. thanks please reply fast! thanks

stanglx2002

the belt you need is a 850K6 is the part number

primetime5.0

if it stretced then buy an even smaller belt

sastangman

i have a 77 inch belt on my car and haven't had that problem,are you
sure you tightened down the alt bolts or something?

stanglx2002

do you have the belt routed right

jpc

I had the same problem when I deleted my A/C and bypassed my smog pump, had two different belts stretched out the tensioner to max that I thought was the right size, third one ended up with the tensioner arrow right in the middle that was three years ago and never stretched anymore, so like Mustang30240 said get one even smaller..

dc_mann8

u probably routed it the bad way is u used 77, mine needed 83.5

92hatchLX

What is the correct way to route it, I have belt number 850K6 and someone gave me a diagram and it absolutely will not fit. StangLX can you show me the way that you routed it with that belt?

stanglx2002

https://mustangforums.com/upfiles/91...EFA38AE818.gif

this is how i routed mine

hawaii5.0

835k6. is the part number 83.5 inch belt