AC High Side Service Valve Leaking
Anyone ever see replacement valves so I don't have to replace the lines?
Jul 22nd, 2009 4:35 pm
Jul 22nd, 2009 4:43 pm
Jul 22nd, 2009 5:27 pm
Jul 22nd, 2009 6:36 pm
Jul 22nd, 2009 7:10 pm
Sometimes the cost of repairing a valve, time effort and small part, costs more than putting on a new line. It is a matter of economics for the shop. Evacuate the system, replace a line, replace the refrigerant and away you go or evacuate, pull off the line, work on the valve, test the valve, reinstall the line, replace the refrigerant and go.
Jul 22nd, 2009 11:30 pm
That's the way that valve is suppose to work. The cap provides the primary seal. If there's no leak with the cap on, then there's nothing wrong. If it leaks with the cap on, replace the cap
Jul 23rd, 2009 6:01 am
I am quite certain there is a schrader valve under the cap. The cap keeps dirt out of the schrader valve. Like a tire valve and cap.
Jul 23rd, 2009 11:50 pm
I had a problem with no A/C on my Grand Am, and it turned out to be the High Pressure Valve stuck open. Thus, all refrigerant was released. It was cleaned up, and refilled, and haven't had any problems since.
Jul 24th, 2009 12:52 am
Definitely looking similar to a schrader valve. This is a port to hook up gauges, so it needs to be sealed and also being on the high side, I'd say a normal cap wouldn't keep the refrigerant in.
Jul 24th, 2009 11:46 am
x2. The cap provides the secondary seal. The Schrader is the primary "shut-off" from leaks but the cap is a little more than a tyre valve cap, at least according to GM service manuals. The GM service manuals usually state that the cap should be replaced once removed, or something similar to that--i.e. they make it clear that the cap is also an important part of the seal for the valve.
Jul 24th, 2009 1:37 pm
Jul 24th, 2009 2:09 pm
Jul 24th, 2009 6:29 pm
Jul 26th, 2009 1:15 am
Pictures 1,2,4 look like the low side port which will have a schrader valve. The black cap in pic#4 should have a blue stripe and ribs. (although it looks like it's on the smaller line which is normally the high side ??)