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GM High Side Service Port Help

GSORK1961 on Thu September 27, 2007 8:37 PM User is offline

Year: 02
Make: Chevy
Model: Silverado
Engine Size: Dmax
Refrigerant Type: 134a
Country of Origin: United States

My high side port is leaking. I think simple replace the schrader valve, WRONG. No valve, a rubber flap
So I guess I need to replace Part # 52458184. I have tried to remove with a wrench and flarer nut crowfoot. I'm starting to round the port. I'm using 5/8" size
Any help info before I really break something.
Thanks Gary

chris142 on Thu September 27, 2007 8:57 PM User is offline

The part that looks like a nut is part of the manifold. It dont come off. Grab the fitting near the top, above the nut looking thing with pliers and unscrew it. It's a regular right hand thread.

Chick on Thu September 27, 2007 9:00 PM User is offlineView users profile

The nut is welded to the line, eventually you'll rip it off the line... Use a vise grip and twist it off, (the service port) holding the "nut" on the line (to keep from twisting that off) you don't need the old one, so if you chew it up, you are not using it again...Once it breaks loose, it screws right out..Hope this helps...

AcDelco part number 15-5438
Here's whatr the new one looks like. Photo courtesy of AcDelco:



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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

Edited: Thu September 27, 2007 at 9:05 PM by Chick

nascarwld on Fri September 28, 2007 11:11 AM User is offlineView users profile

We carry these on our web site. PRIMARY SEAL GM HI SIDE

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Take care, David When considering your next auto a/c purchase. Please consider the site that supports you, www.ACKits.com

Chick on Fri September 28, 2007 11:22 AM User is offlineView users profile

Now that is good to know, everyone with a newer GM should buy a spare and change them when servicing thier car or truck, or keep one on hand..Ever go into a parts store and ask for one only to have the sales person look at you like you don't know what ypu're talking about?? ..I have several in my toolbox, as you never know when one will fail...

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

chris142 on Fri September 28, 2007 9:14 PM User is offline

Every recharge I do gets a new one. The old ones have a 99% failure rate with me which means sucking it back out and redoing the whole recharge over again. So I just replace it while the system is empty.

cc61 on Sat September 29, 2007 7:13 AM User is offline

chris I thought I was the only one that done that on GM's? I refuse to hook my high side hose to a used one!!! like chris said I know when I am done it will leak!

GSORK1961 on Mon October 01, 2007 10:36 PM User is offline

Can I put a regular service port that has a schreader valve or do I need to use that same valve?
Another question After I vac system do I need to add oil? what kind? how much? I dont have a machine just a gauge and a vac pump
Thanks all

Chick on Tue October 02, 2007 5:42 AM User is offlineView users profile

You can add some if some was ;lost thru the leak, otherwise it should be fine. A half ounce won't hurt if you feel uneasy about it though... Use PAG 150 viscosity oil with your system...Hope this helps..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

NickD on Tue October 02, 2007 6:29 AM User is offline

Quote
Can I put a regular service port that has a schreader valve or do I need to use that same valve?

Seems odd with all this jazz about releasing refrigerants, huge fines, etc., that this quick release poorly sealed service port is what the EPA says we must use. But do not try to use logic in dealing with this, you will go insane, just do what you are told. It's okay if your service port leaks, but just do not depress it to release the rest of the refrigerant, can be in for a stiff fine.

cardc26 on Sun June 03, 2012 8:48 AM User is offline

Can you please tell me if this port will also fix a 2001 Chevy Monte Carlo SS?

Yesterday I replaced my condenser and receiver/dryer. Vacuumed the system down then filled it and everything looked good till I pulled off the connector from the high side port, refrigerant was shooting out everywhere, replaced the cap and it appears to have stopped. To be sure I put a balloon over it and secured it with a zip tie to see if it blew up, so far nada but I want to get a new port. I tried going to Autozone, Napa, Pep boys and they told me it's a shrader valve. I explained to them it's a ball valve and they looked at me like I have 2 heads. I know I can order it from the dealer or GMPartsDirect.com but I need to get one of these ASAP. About to take a long trip and need my A/C working.

Thanks in advance.

GM Tech on Sun June 03, 2012 8:59 AM User is offline

Relax- a good cap will seal it until you receive the one from A/C kits-our proud board sponsor-- go on your trip-- you have already proved to yourself it will seal.

Oh- they are all the same for GM

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Edited: Sun June 03, 2012 at 9:00 AM by GM Tech

chris142 on Sun June 03, 2012 11:52 AM User is offline

They use the same part on many cars. From Chevy's to VW's.

Sellncars on Sun June 10, 2012 10:34 PM User is offline

Hey everyone,

Chick, i have a 1997 GMC Sierra K1500 with a 5.7L that has the same problem. I had a spare fitting here in my tool box, i installed it but the dye that i put in the system still shows a leak around it. How do i stop it from leaking around the fitting?

Update: Changed out the line and vacuumed, then recharged all is fine now.

Edited: Mon June 11, 2012 at 10:33 PM by Sellncars

buickwagon on Mon June 11, 2012 12:51 AM User is offline

Did you lubricate the o-ring with a smear of AC compressor oil before installation?

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I've saved hundreds on service by spending thousands on tools.

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