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1999 GMC Sonoma 2.2L AC Issue
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LudlowLou
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May 12, 2015, 9:40 AM
Post #1 of 11
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1999 GMC Sonoma 2.2L AC Issue
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The "liquid line" has a "Schrader" port on it with a black cap. My friend who thinks he knows all when it come to AC says that I need a new liquid line since the port is broken.......the "pin" in the Schrader valve is missing.
Well I got a new liquid line from dealer/AC Delco for GM. It looks the same. There is no pin, but you can see what appears to be a black rubber membrane at the bottom of the port.
What is the truth about this? I hesitate in proceeding with this repair with the fear that I cannot return the part if it too is faulty?
Help Junkies....
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GC
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May 12, 2015, 9:48 AM
Post #2 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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Are you talking about the valve inside the service port? You can get a replacement, but unless you know your stuff with a/c, dont even bother trying this on your own. A/C issues can get real expensive real fast.
____________________________________________________
Willing to help, willing to learn... Rob
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 12, 2015, 9:50 AM
Post #3 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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No offense but don't take advice from non pro A/C techs. GM and no doubt others DON'T ALWAYS USE Shrader valves but rather a ball valve and many leak a tad without a good cap.
Shraders are better IMO but now you probably own a line (don't call it a liquid line either it's the high side line but get the idea) I think your "A/C friend" should up and buy for you.
What was wrong to begin with that you even took a cap off? With this so far whatever is wrong send it out to real pros or you'll regret it,
T
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LudlowLou
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May 12, 2015, 9:58 AM
Post #4 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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"ball valve" that is what it looks like to me......a tiny black one sitting right where the needle is ordinairly found on the Schraders I am most familiar with. The line on the truck now is definitely leaking from that port. Just checking....thanks & will report back.
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Discretesignals
Ultimate Carjunky
/ Moderator
May 12, 2015, 11:36 AM
Post #5 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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Ac Delco 155438
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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LudlowLou
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May 12, 2015, 12:07 PM
Post #6 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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So does this piece screw in right over the exisiting port? Similar to an extension?
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Tom Greenleaf
Ultimate Carjunky
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May 12, 2015, 1:31 PM
Post #7 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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It works the same way with gauges or hook up. It's kinda like a ball point pen instead that's all.
You do or don't need to touch it depending on what the problem is if any?
Hard to find a pic down at one but see if this shows..............
No Shrader type, same fitting for service purposes.
Sport - A/C isn't a good DIY thing and you can go broke fast just touching stuff if you don't have a clue. There's probably nothing wrong with the one you have and don't need a new one or about all if really failed and the reason can replace just the port at the risk of breaking the line.
Depending on YOUR equipment sometimes any or either high or low fitting are quite fussy to hook up to and some just refuse or need a right angle end.
The real question is what are you doing or trying to do? These alloys don't like coming apart for replacement and can end up needing the next item if also corroded up a lot newer than this they get stuck.
Granted, the parts outlets make end isle displays of crap to make anything A/C look very DIY plus frequently push the products you don't want in your system and probably don't have what you need to know if you need to touch it or not. Totally NOT good to use non OE products which is most of what you see for sale if you looked - don't fall for it,
T
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Discretesignals
Ultimate Carjunky
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May 12, 2015, 1:37 PM
Post #8 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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No it doesn't. The old service fitting unscrews from the line socket.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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LudlowLou
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May 12, 2015, 2:13 PM
Post #9 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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I absolutely agree with back yard mechanix NOT messing around with AC. Learned my lessons long ago. Just curious about what I am hearing from 2 different people (1) is my dearest buddy, who does know a lot about commercial refrigeration, but hardly automotive (2) is the ASE credentialed professional who I am about to pay.
ASE pro said "be smart and get a new hose" $68 bucks and 24hrs later I got one from the local Cheyy dealer.
The whole term "Schrader" threw me off....last I knew it was part of a bicycle tube?
Thanks guys....I would send you a pizza, but it would be cold when it got there. Love Car Junky.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 12, 2015, 4:15 PM
Post #10 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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Good luck with better help. Sorry I spelled "Schrader" incorrectly a few times. It was the invention of 'August Schrader" so it bears his name also called the American valve you knew of on a tire - about any.
A/C uses a different size of same or those damn ball valves types. I try to leave those alone and cap untouched unless really necessary. Many vehicles don't use a high side port at all anymore - to save a buck and because you can do it without them AND know the pressure without a gauge!
There's just too dang much that can go wrong and cost you a fortune messing with any A/C but especially "Mobile A/C" vs commercial or residential styles. Same physics - different how powered so a lot of differences to know.
Good luck. Sorry if I was harsh but hear so much how many systems that needed little got wrecked it makes me ill. It's just the wrong place to try to save money especially if the issue involves refrigerant,
T
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Discretesignals
Ultimate Carjunky
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May 12, 2015, 6:16 PM
Post #11 of 11
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Re: 1999 GMC Sonoma 2.2L AC Issue
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I hate them ball valves. I usually replace them when doing ac work. I've been caught too many times after doing service after removing the hose coupler to find out the port leaking is like a sieve. I've had them blow balls out a couple times.
Another trick it to not screw down your coupler valve knob till it bottoms out on those. The pin inside the coupler that unseats the ball in the port can actually push it down too far and cause it to leak when you remove the coupler. Turn it just enough to see pressure change on your gauges. This also goes for the schrader type too.
Another thing is to be sure you put the correct torque on the replacement valve port. Had a couple where when you go to unscrew the plastic cap the whole valve unscrews with it. Then you have an gusher of refrigerant to deal while your trying to get the port to screw back on.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 12, 2015, 6:20 PM)
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