A/c Lines?
Thread Starter
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
A/c Lines?
Any of you guys know what the differance in the compressor a/c lines between a 77 and 79? I have a late model 77 with the r-4 short compressor on it and one of our members is parting out a 79. I looked on ecklers and the pictures show the 79 to have what looks like a muffler in the line and the 77 did not. I dont know why the 79 would not work this is not a concours restoration.
Drifting
Joined: Oct 2003
Posts: 1,426
Likes: 1
From: VetteMOD
St. Jude Donor '05-'07
I don't believe there is a muffler on the 79 hose. The hard line that runs to the condenser has a block (see picture) in it that is not shown in the AIM. I think it might be a service port, not sure if it's needed
Racer
Joined: Dec 2003
Posts: 304
Likes: 0
From: Pasadena Maryland
That block is the sight glass and pressure cut off switch on the discharge side of the system. The muffler you are looking for is actually the dryer/filter and is located next to the evaporator on the passenger side of the engine compartment near the fire wall. This dryer should be replaced when the system is opened. I would think that the AC system in a 77 & 79 are the same. As long as you have all the components it should work. You also should put in a new orifice valve in the system especially if you're going to use R134A as the new refrigerant.
