? for A/C Gurus
Thread Starter
Melting Slicks
Joined: Nov 1999
Posts: 2,461
Likes: 354
From: Madison Alabama
? for A/C Gurus
The A/C on my '82 works (checked yesterday afternoon: air at the center vent is at 52-54 degrees) but the compressor cycles on and off about every 10 seconds for the first minute or so. Happens when I'm at idle or under a load. After five minutes or so the compressor cycles normally. The system has been converted to 134. Any thoughts?
Intermediate
Joined: Dec 2003
Posts: 26
Likes: 0
From: las vegas nv
Re: ? for A/C Gurus (m and t's77)
Just got the air in my 82 running and it does the same thing. Switched everything to 134 also. Maybe I'll take it back where I got it charged and let them take some pressure readings. It was in the 50's the day I had it done and now it's over 100.
Race Director
Joined: Oct 2002
Posts: 12,065
Likes: 2
From: Smalltownville Michigan
Cruise-In 5, 6 & 10 Veteran
St. Jude Donor '09
Re: ? for A/C Gurus (comp)
onr member advised to change the low pressure switch, i think to a adjustable one
Racer
Joined: May 2003
Posts: 477
Likes: 0
From: KS
Re: ? for A/C Gurus (mooneyd)
My r134a-converted, '81 was cycling on/off every few seconds and the pressure was low. I added freon and stopleak and repressured to 45lbs. With 23 year old seals, though, it's more of a stopgap measure, but cheaper than tearing out/replacing everything right now.
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Thread Starter
Melting Slicks
Joined: Nov 1999
Posts: 2,461
Likes: 354
From: Madison Alabama
Re: ? for A/C Gurus (Master Ho)
Thanks for the help. Can anyone recommend a user friendly gauge that I can test the system pressure myself with? I've seen some simple ones at Wally World and AutoZone but have not looked at them very close. I have the re-charge kit from when I converted my Jeep to 134 so I have the fill hose....don't recall how I knew it was "full". Guess I just followed the instructions in the kit.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
Re: ? for A/C Gurus (2TONE82)
You really need a gauge set to see where you are at. If you just use the "suicide kit" you don't know anything, with just the low-side injection kit (with gauge) you don't know if the high-side pressure is high or low. Try pawn shops or Ebay. Might even try a rental shop.
[Modified by markdtn, 11:50 AM 6/21/2004]
[Modified by markdtn, 11:50 AM 6/21/2004]
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
Re: ? for A/C Gurus (markdtn)
Team Owner
Joined: May 2001
Posts: 29,745
Likes: 3
From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
CI 6-7-8 Veteran
CI-VIII Burnout Champ
St. Jude Donor '06-'10, '13
Re: ? for A/C Gurus (zwede)
While I was at my local Autozone yesterday, they had a full gage manifold kit there, with full instructions and everything. The gages, manifold, hoses and all came in a black plastic box to keep it all safe.
It looked like the most comprehensive over the counter R134 kit I have ever seen. If you are still on R12, then that is a different story. If you are on R12, I would go get it serviced and have them just add some more R12 (still available in some places). The price of just getting some more R12 will be way less than the price to convert the system to R134.
To determine if yours has been converted, look for the schrader valves in the A/C lines. If they look like regular sized schrader valves (like tire valve stems) then the system is still running on R12. If they are larger with a blue / red cap on them then someone has done a R134 conversion to it. R12 and R134 use different sized valves to install the material. Once you screw a R134 valve onto the old R12 valve it won't come back off.
It looked like the most comprehensive over the counter R134 kit I have ever seen. If you are still on R12, then that is a different story. If you are on R12, I would go get it serviced and have them just add some more R12 (still available in some places). The price of just getting some more R12 will be way less than the price to convert the system to R134.
To determine if yours has been converted, look for the schrader valves in the A/C lines. If they look like regular sized schrader valves (like tire valve stems) then the system is still running on R12. If they are larger with a blue / red cap on them then someone has done a R134 conversion to it. R12 and R134 use different sized valves to install the material. Once you screw a R134 valve onto the old R12 valve it won't come back off.
Le Mans Master
Joined: Mar 2000
Posts: 9,127
Likes: 2,326
From: Pottsville, PA. USA Home Of America's Oldest Brewery Yuengling
Re: ? for A/C Gurus (BSeery)
I just rebuilt my system on my 75. I replaced the compressor, hose, switch, VIR, and all of the Orings. I had it charged with 134a and it blows 38o at the center vents.
Thread Starter
Melting Slicks
Joined: Nov 1999
Posts: 2,461
Likes: 354
From: Madison Alabama
Re: ? for A/C Gurus (Corvette ED)
Update: I picked up a kit at Wally-World (hate that place but the $21 works for my budget). Low pressure gage with a bottle of 134 (charge, oil and leak seal). She blows at 40 degrees now.
Thanks everyone
Thanks everyone
