Mastercool98234 Socket

A very useful tool to remove and install car a/c high side. It fits older Dodge Caravan or Plymouth Voyager as well.

Works well.

What a time saver when working on AC fittings.

I only bought this socket because so many reviewers said that it was a big help in removing the high-side Schrader valve like I have on my '03 Chevy Silverado. It did work, but realistically it was a totally unnecessary tool that was really not needed for me to remove the valve. A pair of pliers or a Cresent wrench would have worked just fine to remove the old valve and replace the new one.

The socket works great.

this made getting the old service port out a lot easier

Worked great!

This review may be rather lengthy, but covers several issues others may encounter. I needed to replace the high-pressure port on my GF’s 1996 corvette show car. The corvettes high pressure port has that one-time use GM black rubber ball check valve style. Stupid design! Since the corvettes AC system was completely empty and verified by my manifold gauge set, I pulled a vacuum on it prior to recharging. It held the vacuum at 29.92” Hg for an hour. I charged the system with exactly 2 lb.’s of R134a that it required only to discover the high-pressure port was hissing and never stopped even after quickly blipping the black rubber check ball in the valve a couple of times. There went $40 of refrigerant. I purchased this socket and the high-pressure port set. One of the high-pressure ports (Dorman 800-955) has the Schrader valve stem but the other one was the genuine GM black rubber ball type…. ugh. Using a 16mm wrench as a back-up wrench so as not to twist the aluminum high-pressure pipe and kinking it, this socket removed the port very easily. If I ever encounter issues with the AC on my 2008 Envoy Denali which also has the GM black rubber ball style high-pressure port, I’ll be able to tackle the job. And just so that you don’t waste money on refrigerant, replace the GM rubber ball port with a real Schrader valve port prior to recharging the AC. Unfortunately, a manifold gauge set doesn’t let you know the valves could be leaking because the gauge set is sealing both ports during the leak test. I suppose I could have removed ONLY the high-pressure port manifold coupler of my gauge set, and the low-pressure gauge would have shown a loss in vacuum.

If you want to change the high side A/C fitting on a lot of GM vehicles, this Mastercool socket is exactly what you're looking for. It fits the valve perfectly and with some care (the lines are easily twisted, so support the line while attempting to remove the old fitting) will let you easily change your old fitting out for a new one. Used mine a few times now to replace the dreaded ball style high side fitting found on many GM vehicles with a serviceable Schrader valve instead (GPD 5811696 is an example for anyone looking for one) with no issues. Well worth picking one of these up, especially if you do a lot of A/C work or simply want to replace a bad fitting on your own vehicle.

Se ve de buena calidad, lo único que ne hubiera gustado es que trajera grabada la marca.

Specialty socket, fit for purpose, does what it is supposed to, appears to be of good quality and for these days I think the price is ok. Highly recomended.

Used it to change the high side port on my 2004 GMC Sierra Denali. Fit perfect, no issues

Cumple con su propósito pero no se ajusta perfectamente, las válvulas quedan un poco holgadas lo que provoca que al apretarlas o aflojarlas se queden atascadas en el dado. No trae marca que indique que es Mastercool, por la calidad pareciera que no lo es, pero aún así me sirvió.