This is probably more along the lines of the fans that you want - http://www.carparts.com/details/Chevrolet/Silverado_2500_HD/Item_Auto/Cooling_Fan_Assembly/2005/RDXC160938.html?TID=gglpla&origin=pla&gclid=CjwKEAjw8da8BRDssvyH8uPEgnoSJABJmwYohyG9LR-qyV7YSGJ1xjQTo6vCB5kmSpJ6FSNBNPZbWhoCmNjw_wcB

R12a is a mixture of propane and butane. Why would anyone want to charge their A/C system with something that flammable?

It just seems like the answers I getting is; if you're ac is not blowing as cold as it used to and you'd like for it to be cooler the answers I'm getting is drain the system; weigh what was in it; put correct amount to specs back in. Seems like an AWFUL expense to bear if it just needs a little fre...

No. Not even a little. They are totally incompatible. Where are you that you have R12 available but not R134? near toronto canada. not r12(the old banned stuff) but r-12a, almost same name but not the same this stuff http://www.canadiantire.ca/en/pdp/red-tek-aerosol-12a-refrigerant-can-6-oz-0146116...

No. Not even a little. They are totally incompatible.

Where are you that you have R12 available but not R134?

Let me go at it a different way: Say for instance; 1. You put your gauges on a vehicle; what should the readings be in 85-90 degree with 90% humidity if the system is OK. 2. Do you read the gauges at a certain rpm? 3. If the system is low and you add freon; do you install it at a certain rpm? 4. If...

None with the serp pulley?

Thanks Tim. Do you have such a 510? I'm done with parts store failures. It will need to have a serpentine style pulley. If this works, I'll be doing this same swap on my diesel Wagoneer when it gets back on the road.

So the whole 87 Chevy Dually project just took a turn. I'm upgrading to a serpentine belt and part of the kit has a mount for a R4. Well I have never been a fan of those, and there is a kit for mounting a 508 into the R4 brackets. Will the 508 be adequate for cooling the crew cab in AZ heat? Will th...

Found the leak. When the liquid that I thought was just condensate drain water didn't evaporate, I checked and it appears to be PAG oil. So new evaporator is on the way. And just to add insult to injury, the heater core started leaking also. And the clutch on the new compressor likes to slip if ever...