Fix for super common leak: High side port

Fix for super common leak: High side port

Postby Sailing_Faith [OP] » September 3rd 2019, 11:59pm

Most of our vans probably need a little Freon top up now and then, almost all of them leak at least a little bit from one place.... :chevy:

GM made a weird decision to use a rubber ball check valve on the high side of our vans. These valves almost never seal after you hook a gauge set up. Why they choose to depart from the tried and true Schrader valve is a mystery lost to the sands of time... :confused:

Of course there is the screw on plastic cap that is supposed to protect it... it may slow the leak, but is not designed to hold the pressure (2x temperature +50#)..

Fortunately The good folks at Dorman have us covered;

https://www.amazon.com/gp/product/B00E58M8J4

Of course you have to evacuate the system first, but changing the port is simple...

(Random video from 2second YouTube search) :blah:



Easy peasy :banana:
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Re: Fix for super common leak: High side port

Postby Astro Pop » September 4th 2019, 12:03am

Good find, thanks
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Re: Fix for super common leak: High side port

Postby Leeann_93 » September 5th 2019, 8:22am

Thanks! I’ve been annoyed by this damn valve for years - and my husband (HVAC-R master) has been incandescent. Why in the hell would GM think that a schrader-less valve would work?
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Re: Fix for super common leak: High side port

Postby petema » September 5th 2019, 1:56pm

A short bolt with an O-ring at the bottom would give an adequate seal, wouldn't it? At least until you for some better reason actually need to evacuate the system. P
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Re: Fix for super common leak: High side port

Postby Sailing_Faith [OP] » September 5th 2019, 5:24pm

petema wrote:A short bolt with an O-ring at the bottom would give an adequate seal, wouldn't it? At least until you for some better reason actually need to evacuate the system. P


The seal is accomplished on the side of the fitting, but maybe you could get an orange to seal in compression. I question how worth while a temporary “fix” would be though. ... simply because you would have to evacuate the system to put your temporary bolt in place, and evacuate it again to replace the bolt with a valve....

(Some would argue the need to pull a vacuum both times, but realistically I am not sure that would be necessary).

$8 is a pretty cheap fix in my book. :cheers:
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Re: Fix for super common leak: High side port

Postby AstroWill » September 5th 2019, 8:13pm

An A/C system should never need to be 'topped up regularly', if it ever needs more refrigerant then it's leaking and the leak should be fixed properly.

Not something that I would do unless I was opening the system anyway, but then again, there is no reason to even remove the dust caps unless something is wrong already.

Edit: Thanks for posting, definitely something to keep in mind while you have an empty system.

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Re: Fix for super common leak: High side port

Postby WimpTech » September 5th 2019, 9:10pm

^^^That^^^
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Re: Fix for super common leak: High side port

Postby dcsleeper » August 4th 2020, 6:01pm

My F'in Explorer has a ball valve port in the dryer. Had to buy a new receiver/dryer to replace it.

and a bump cuz every Astro owner should be aware of this!
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