There's a bird under my hood!

[NVW]

The general rule is about 1" shorter w/o vac pump than with vac pump.

It can be tough to move the tensioner, on my 95 I use a socket on the idler pulley bolt with a long arm for leverage to move the idler enough to get the belt on.

 

[WarWagon]

FWIW I am running the same belt as stock on my 1995 with vac pump delete and the CS140. The alternator mod requires a longer belt. Vac pump delete needs shorter belt. The tensioner is stiff as it has to hold the full AC compressor load. Recall this was an R-12 design and factory bailing wired to the higher pressure/load R134a...

 

[Pruittx2]

Update,, Ok So, I went to AutoZone for the belt, cause I had $20 credit on my card and got the 3yr Dayco belt @ 102 in lenth. Stock size cause I have the Vac delete, but the CS144 Alt.
Put the belt on and squeak is gone, and tensioner is in the correct range. till it ran for 10 min's then I get this.



But when I hooked up the laptop, to check the RPM's on the GMTD Scan tool, they were off. Sure as shit, the pulley is of different size. Man that pisses me off, you order the part for a Diesel and get a gasser pulley anyway!! I measured them and the new one is small diameter than the one I took off. SO Now I get to take the Alt off again. and switch that out. So putting a bigger pulley on will make the 102" belt really tight. GRrrrrr!



I did how ever also get my snoway plow bracket on, I sparyed it with the same U-Pol Raptor bedliner that I did the lower body and rockers with last weekend.


I also got the wiring fished thru the bumper, and all new 150amp relay, new solenoid, and new ends on the wiring, for a really clean install. Should be ready to throw the plow on and get to work, when the white stuff starts to fly.

 

[Pruittx2]

***UPDATE***

Today, I finally took the pulley off the new 96 and up CS-144 Alt, and the pulley size was 2 3/8ths in. and the old factory 95 105 amp alt pulley is 2 1/2 in in Dia. So I got that sorted out and put back on.

This has been an awesome addition to my rig, the alt gauge now sit's pegged at 14 Amp almost all the time. If I have everything on both a/c's lights wipers, audio, defrogers, ect. and the lowest I've seen is 13 amp.

 

[3500GMC]

13 volts. ? I hope not 13 amps.

(I know, picky picky, right?) :hihi:

important part is that you feeexed it..

 

[Husker6.5]

Had the same tach problem on my '94 when I went to O'Rileys to get the HD alternator for the DIESEL, had the smaller pulley on it that threw the tach off. Part of what makes some alts "HD" output is spinning them faster at idle by putting a smaller pulley on them. You lose that extra 5-10 amps of charging output if you put the larger diesel pulley back on, but you regain an accurate tach. My tach was showing almost 2800 rpm at 80 mph on my '94 with 3.42 rear gears!