Leaking expansion valve - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 12-02-2015, 03:34 PM

When I vaccuumed down my AC system, it leaked about half the vacuum overnight. The HVAC guy did his initial test, said no leak. I was dubious, but he was going to fill it.

And sure enough, when he did, the -then- found a leak at the expansion valve.

The price isn't much, 20 to 50 bucks, but I want to make sure I get a decent one. The "Four Seasons" one looks more original on the RockAuto pics than the ACDelco one does, and the LMC truck one doesn't include a picture.

The Classic Industries one looks decent, but is $70, and I don't know if it's any more authentic.

Does anyone have any experience or an opinion on which one to get? I think I'll be using R-134, if it matters.

Thanks,
Dave

davepl · 12-02-2015, 09:14 PM

Since no one seems to have been down this road before, I wound up ordering an NOS one to be safe. At least it'll match, and it's listed as "RECONDITIONED". That could mean anything, but hopefully it works.

F.A.A.benny · 12-02-2015, 10:49 PM

Where did you get this "reconditioned" exp valve, Ebay? NOS would mean it was never used so there would be no need to recondition.

12-02-2015, 03:34 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Leaking expansion valve When I vaccuumed down my AC system, it leaked about half the vacuum overnight. The HVAC guy did his initial test, said no leak. I was dubious, but he was going to fill it. And sure enough, when he did, the -then- found a leak at the expansion valve. The price isn't much, 20 to 50 bucks, but I want to make sure I get a decent one. The "Four Seasons" one looks more original on the RockAuto pics than the ACDelco one does, and the LMC truck one doesn't include a picture. The Classic Industries one looks decent, but is $70, and I don't know if it's any more authentic. Does anyone have any experience or an opinion on which one to get? I think I'll be using R-134, if it matters. Thanks, Dave __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

12-02-2015, 09:14 PM	#2
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Leaking expansion valve Since no one seems to have been down this road before, I wound up ordering an NOS one to be safe. At least it'll match, and it's listed as "RECONDITIONED". That could mean anything, but hopefully it works. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

12-02-2015, 10:49 PM	#3
F.A.A.benny Registered User Join Date: Jul 2015 Location: Euless, Tx Posts: 431	Re: Leaking expansion valve Where did you get this "reconditioned" exp valve, Ebay? NOS would mean it was never used so there would be no need to recondition.



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