Search found 208 matches

by bohica2xo
Thu Jul 27, 2017 8:33 pm
Forum: Automotive Air Conditioning Forum
Topic: AC conversion For my Nice Old Truck
Replies: 6
Views: 124

Re: AC conversion For my Nice Old Truck

What diameter fan are you running?

You can usually charge the last bit easier at 1800 RPM - the low side should drop. With a low side below 50 psi, at 90f ambient the refrigerant should be at a higher pressure & flow just fine.

Record your stable 1800 rpm pressures & post them here.
by bohica2xo
Thu Jul 27, 2017 8:14 pm
Forum: Automotive Air Conditioning Forum
Topic: Need to find the right part to replace my a/c clutch
Replies: 6
Views: 114

Re: Need to find the right part to replace my a/c clutch

Any steel washer can be a shim.

That gap can be .005 - as long as it does not drag when off. Some clutch plates are flatter than others. If you find an .012 shim - toss it in there & try it.

Any U-Pull it junkyard is a good place to grab some shims if you need them.
by bohica2xo
Thu Jul 27, 2017 7:58 am
Forum: Automotive Air Conditioning Forum
Topic: AC conversion For my Nice Old Truck
Replies: 6
Views: 124

Re: AC conversion For my Nice Old Truck

You have two problems. 1) Condenser airflow at idle. 2) Undercharged. At idle you have high pressures. Typically a sign of poor condenser airflow. Weak fan / No shroud / Air bypassing condenser. At cruise you have low pressure, and poor cooling. Typical for an undercharged system that can't flood th...
by bohica2xo
Thu Jul 20, 2017 9:09 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor clutch sticking when de-energized
Replies: 2
Views: 69

Re: Compressor clutch sticking when de-energized

Probably best to return the compressor to the rebuilder. Be sure to tell them which refrigerant you are using.
by bohica2xo
Thu Jul 20, 2017 9:07 am
Forum: Automotive Air Conditioning Forum
Topic: Need some direction....
Replies: 13
Views: 225

Re: Need some direction....

An overcharge of oil or refrigerant can cause high head pressures.

Your original post mentions a slow decline, which absent adding anything to the system is usually a condenser problem.

If you have added materials to the system and then it changed, that is a different condition.

.
by bohica2xo
Wed Jul 19, 2017 6:19 pm
Forum: Automotive Air Conditioning Forum
Topic: Diagnostic assistance....
Replies: 8
Views: 163

Re: Diagnostic assistance....

Glad you found some junkyard parts for your car.
by bohica2xo
Tue Jul 18, 2017 9:25 pm
Forum: Automotive Air Conditioning Forum
Topic: Need some direction....
Replies: 13
Views: 225

Re: Need some direction....

425 psi is a condenser issue, not a weak compressor. Generally an airflow issue. Condensers clog deep in the fins with small debris & insects. The face can look clean & still be plugged. Wait for dark. Hang a shop light or bare bulb in the radiator shroud, and start looking straight through ...
by bohica2xo
Tue Jul 18, 2017 6:02 pm
Forum: Automotive Air Conditioning Forum
Topic: High Pressure issue R4 Compressor Chevrolet Tahoe
Replies: 11
Views: 149

Re: High Pressure issue R4 Compressor Chevrolet Tahoe

If the fans don't run with the compressor it is not right. You can let it ride the HPCO until they do, but eventually that will cost money. The 1994 trucks all had mechanical clutch fans. Fix the electrical error that is keeping the fans from starting with the A/C compressor command as GM intended. ...
by bohica2xo
Tue Jul 18, 2017 5:53 pm
Forum: Automotive Air Conditioning Forum
Topic: Parallel or Serpentine Condenser
Replies: 6
Views: 129

Re: Parallel or Serpentine Condenser

So the compressor was not seized? Just the clutch bearing?

.
by bohica2xo
Tue Jul 18, 2017 10:35 am
Forum: Automotive Air Conditioning Forum
Topic: High Pressure issue R4 Compressor Chevrolet Tahoe
Replies: 11
Views: 149

Re: High Pressure issue R4 Compressor Chevrolet Tahoe

Condenser airflow issue.

Fan type?

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