Join Date: Sep 1999
Location: Dalton, Georgia
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York AC clutch help
Long time no type....
I am the proud owner of an '88 Grand Wagoneer that is in pretty good shape mechanically - lots of torque with a cushy ride :-)
One thing has me baffled though with the AC compressor clutch. The compressor was replaced by the PO and the knee chiller was freezing me out - it worked incredibly well.
Driving down I-75 yesterday (at a leisurely 60mph with a 3speed), the air got warmer coming from the AC. Not wanting to pull over and troubleshoot I turned it off. When I got home I started troubleshooting and saw the clutch not staying engaged for a long period. Checked high side pressure and it looks great when the clutch is in. Checked voltage to the clutch while running and it was a steady 13.1vdc clutch engaged or not. Checked ground resistance to the battery and it's less than an ohm. I still sanded the compressor mounting bosses and bracket just for fun. I clamped a welding lead to the compressor body and to the battery with no change - I think the ground is ok.
So I bought a reman clutch. Borrowed a tool to remove the old one and installed the new (new gates belts also). Now I have the same issue except it works around town but get the truck up to 45mph and it starts acting the same. The clutch will drop out occasionally while idling long enough for the air to get really warm.
I'm stumped (not hard to do). The AC was awesome from May on until this week - it's not even that hot here - highs in the low 80's this week.
The truck is stock except for aluminum intake, 4 barrel carb, HEI distributer: 360,727,np229, D44's.
88 YJ (sort of)