Adding refrigerant to 1993 (LT-1) Corvette

[Joe S.]

I have a need to carefully add (R-12) "yes I have a can left" to my '93 Corvette. Can anyone tell me where (on the car) to attach my refill hose? I have done this on passenger cars and found that the locations vary greatly.

[Jim T.]

Re: Adding refrigerant to 1993 (LT-1) Corvette

Low pressure line.

[Edward J.]

Re: Adding refrigerant to 1993 (LT-1) Corvette

Joe, find the receiver dryer (silver canister) there should be a fitting on it. as Jim says this is the low side tap.

[Joe L.]

Re: Adding refrigerant to 1993 (LT-1) Corvette

I have a need to carefully add (R-12) "yes I have a can left" to my '93 Corvette. Can anyone tell me where (on the car) to attach my refill hose? I have done this on passenger cars and found that the locations vary greatly.

Joe------


Don't add too much or you can ruin the compressor.

[Jim T.]

Re: Adding refrigerant to 1993 (LT-1) Corvette

Do not know about the 1993 Corvette, however my 1985's service manual on air conditioning only specifies a "feel test" to tell you when the charge is enough. I really like using my 70's sight glass a lot better.

[Dick W.]

Re: Adding refrigerant to 1993 (LT-1) Corvette

Do not know about the 1993 Corvette, however my 1985's service manual on air conditioning only specifies a "feel test" to tell you when the charge is enough. I really like using my 70's sight glass a lot better.

Feel test is very accurate if you understand it. Undercharged or over charged the evaporator pipe will feel cool, when you reach the proper charge, the pipe will cold, a very sharp feeling cold.. It is hard to describe, but you can tell the difference. Do not add any more refrigerant once the pipe turns cold.

[Jim T.]

Re: Adding refrigerant to 1993 (LT-1) Corvette

Dick this information is taken from my 1985 Corvette Shop Manual. If the inlet pipe to the evaporator is cooler than the accumulator surface this is a indication of low charge of refrigerant. Add slight amounts of 16 oz or 1/4 lb until both feel same temp. Allow stabilization time between additions. Then add 420 ml (.88 lbs) or one can additional refrigerant. I am still trying to learn this "feel test" on my 1985 Corvette.