shrader valve stem?

89cherokee · #1 (**permalink**) 08-02-2006, 09:35 AM

I read the forum theads about changing over to R134a in my cherokee (89). I purchased the R134a quick connects. When I was getting ready to thread them on I noticed I did not have valve stems in either schrader valve from my R12 fittings. Is this normal? I woudl expect that my R134a will not activate the AC lines without them. Is this an easy item to purchase? Thanks for any help.

89cherokee · #2 (**permalink**) 08-02-2006, 01:56 PM

my bad...schrader is spelled with an sch...not sh.

89cherokee · #3 (**permalink**) 08-03-2006, 07:04 AM

In case anyone else runs into this problem...schrader valves cost a little under $2. If they're missing, your AC charge will leak out. I still haven't figured out where mine went...and when? But apparently my auto parts place sells a bunch of them.

90Xjay · #4 (**permalink**) 08-05-2006, 08:38 PM

Screw in a set and install your new fittings, pull a vacuum and charge her up!

88Wrangles · #5 (**permalink**) 08-06-2006, 12:44 AM

Just make sure you use A/C schrader valves...and not the ones for tires

90Xjay · #6 (**permalink**) 08-06-2006, 10:13 PM

Quote:

Originally Posted by 88Wrangles

Just make sure you use A/C schrader valves...and not the ones for tires

Good point!

89cherokee · #7 (**permalink**) 08-07-2006, 07:16 AM

I purchased some tire schrader valves at Pep Boys (I needed the valve core tool) and they had a red ring (seal). I purchased 2 AC schrader valves at a parts store and they had a black ring. I would expect that is how you tell the difference...red for tires and black for AC.

90Xjay · #8 (**permalink**) 08-09-2006, 07:00 PM

That sounds right, but I have never paid attention to the colors much. But now that you point it out, my spare ones are that way too

88Wrangles · #9 (**permalink**) 08-10-2006, 01:36 AM

Ya, and the valve for an a/c system are a lot harder to push down by hand than a tire valve.