AC Comp Clutch
- Thread starter cvcsmkr
- Start date
yeah, there's a low pressure control for the clutch. The clutch will engage momentarily at startup wether or not the system's empty. The reason for this is simple. GM has got a really simple way of doing the pistons on their A/C compressors. They just press the pin into the piston, this works well enough at least untill the thing sits for over a winter. When the piston freezes into place and the clutch engages say the first time you switch it on during the summer, bye bye compressor. By moving it every time you start the vehicle you keep the piston from freezing in place. Just a bit of interesting info, a bit OT however. But getting back to your topic of being low on freon, checking this is easy. I your clutch won't stay on with the AC going there's a sensor on the silver cylinder tit'll be on the top of it if I remember correctly (drive a beater, got windows for AC) It'll have two pins in it, what you do is you shunt these two pins and if your clutch locks your freon is out. Wish I had a pic to point you in the right direction with, but this'll give you the right idea. If you have to recharge, you'll probably want the system converted over to something like R-134A. be warned that it sucks though, doesn't cool near as good as the R-12 does. Then again, you've got a SyTy so 2-55 AC hould suffice =)