Search found 185 matches

by Dougflas
Mon Sep 18, 2017 8:36 am
Forum: Automotive Air Conditioning Forum
Topic: Refrigerant not being pulled in - please advise
Replies: 2
Views: 75

Re: Refrigerant not being pulled in - please advise

Sounds as if the low side hose connector is not connected into the system. Remove the gauges and bleed them. Make sure the hand wheels are closed. Connect the low side to the system. Do you have pressure? You should see a static pressure.
by Dougflas
Mon Aug 28, 2017 5:30 am
Forum: Automotive Air Conditioning Forum
Topic: A slightly differnt A/C system
Replies: 31
Views: 743

Re: A slightly differnt A/C system

It may require less refrigerant because of the fact that when you're flying, you are so much higher and the altitude effects the refrigerant charge. Do you have the system's specs and did you weigh the charge? Also, I have 30 pounder drums of virgin R12.
by Dougflas
Thu Aug 24, 2017 8:41 pm
Forum: Automotive Air Conditioning Forum
Topic: GM R4 Compressor - New Scroll Design. Better than Piston Type ?
Replies: 26
Views: 756

Re: GM R4 Compressor - New Scroll Design. Better than Piston Type ?

Every scroll I have run or seen on current vehicles have a need for speed- every one of their owners complain of no cooling at idle. Suction pressure is in the 60s at idle- will drop to 30s at 3500 erpm. Wouldn't the fact that the pulley on the scroll is smaller eliminate the high rpm requirement?
by Dougflas
Sun Aug 13, 2017 3:23 am
Forum: Automotive Air Conditioning Forum
Topic: A6 compressor oil port
Replies: 2
Views: 176

Re: A6 compressor oil port

Refrigerant will be expelled and oil if opened under pressure. You will have to recover the refrigerant.
by Dougflas
Sat Aug 12, 2017 6:40 am
Forum: Automotive Air Conditioning Forum
Topic: Clutch Won't Engage
Replies: 3
Views: 256

Re: Clutch Won't Engage

You need to verify clutch engages with 12v at the compressor. You may have too wide a clutch gap. Trace the wire from clutch backward to see where 12v drops off if that is the case. It would help if you could post wiring diagram.
by Dougflas
Sat Aug 12, 2017 6:36 am
Forum: Automotive Air Conditioning Forum
Topic: Vacuum on the low side
Replies: 3
Views: 229

Re: Vacuum on the low side

Low side shrader not opening. Make and model of vehicle?
by Dougflas
Sat Aug 12, 2017 6:34 am
Forum: Automotive Air Conditioning Forum
Topic: R12 Charging Problem
Replies: 3
Views: 218

Re: R12 Charging Problem

By any chance is your lo0w side hose fitting not opening the low side shrader?
by Dougflas
Fri Jul 28, 2017 3:23 pm
Forum: Automotive Air Conditioning Forum
Topic: 04 gto air compressor
Replies: 1
Views: 107

Re: 04 gto air compressor

Try using a screwdriver handle and tap the clutch plate. See if it engages. If so, you have the well known gap problem.
by Dougflas
Thu Jul 27, 2017 9:11 pm
Forum: Automotive Air Conditioning Forum
Topic: Leak testing with shop air
Replies: 4
Views: 219

Re: Leak testing with shop air

Do not use soap and water. You will get better results using Big Blue or Snoop.
by Dougflas
Wed Jul 26, 2017 7:47 am
Forum: Automotive Air Conditioning Forum
Topic: 72 DeVile retrofit
Replies: 2
Views: 139

Re: 72 DeVile retrofit

Keep the POA and expansion valve set up. All driers made now can handle r134a. I personally would keep it R12 also.

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