Join Date: Aug 2002
Location: near Cleveland, Ohio
Feedback Score: 0 reviews
Re: How to know if AC compressor is dead or just clutch
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I have the same problem; leak, no refrigerant, but compressor good. How does one evac the system. I see conversion kits available, do these come with all needed materials/tools? If you wouldn't mind, would you mind a brief rundown on what to do to switch the system to 134A?
Thanks in advance-
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To evac the system you need a A/C vacuum pump or have a shop do it. I bought a relatively inexpensive vacuum pump from JC Whitney to do the job myself... I have used it on probably 5 vehicles now.
THe conversion kits that you can get at Wal-Mart, etc come with everything that you need to do the work, except the evac pump of course. The kit instructions "insinuate" that you can add the R134a to an R12 system, however that is not true. All of the old refrigerant and oil must be evacuated first. And a vacuum must be held for at least 30 minutes in order to boil off any moisture that may be in the system, particularly if the system was low or empty. An A/C system will actually pull outside air through a leaking O-ring under certain circumstances.
As far as refilling the system, that's easy. You screw on the R134A adaptors onto the two system fittings, and refill the system with refrigerant / oil.
1997 Ford F350 SRW 7.3L PSD
1985 Ford Ranger 2.3L 5 speed
1966 Mustang 200 I6, auto, 4 wheel disk, power brake retrofit, Corvette master.
Former vehicles, 1994 E350 7.3L IDI, 1985 International 1654 rollback, 6.9L IDI, (2) 1994 Ford E350 7.3L IDI, 1985 Ford F350 DRW 6.9L IDI, 1985 Ford F350 wrecker 6.9L IDI.
*dual ASE Master Certified, Automotive, Medium & Heavy trucks*
Owner / operator, Patriot Automotive, N Ridgeville OH