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Is there a specific valve I need to replace or autozone is fine

lv6l on Wed October 22, 2008 2:46 PM User is offline

Year: 1994
Make: honda
Model: civic
Refrigerant Type: r134a

I put dye in my ac system and found out a few days later it was leaking out from both the low and high side port. My question is should I replace the whole entire hose or should I just replace the valve. My concern is about 2 months ago I replace both low and high side valve with new ones I bought from autozone. But I do not know why it's leaking now. I would like to know is there a specific size or something or is my hose bad and needs replacing. Thanks.

Matt L on Wed October 22, 2008 3:28 PM User is offline

Check the seals in the caps, or just buy a new pair.

lv6l on Thu October 23, 2008 12:47 AM User is offline

Well, that is why I went on this forum, I recently replace both of it with brand new ones. And now, I am asking if there is specific ones made for my model and year or is it all the same? When I remove the caps I can see bubbles come out with green liquid dye. I believe that is a leak.

HECAT on Thu October 23, 2008 5:44 AM User is offline

All the ball and spring type (Schroeder and others) valves with a metal to metal seat, will have what is called "acceptable leakage". Yes it can be more with a cheaper chain store part than from the OE, but this can also be true in reverse. "Sniffing" and or "soaping" these valves for a non leaker can be an exercise in futility. Make sure the o-ring in the cap is good, install; and then check for leaks.


HECAT: You support the Forum when you consider for your a/c parts.


mk378 on Thu October 23, 2008 8:48 AM User is offline

How fast is your charge leaking away? Everyone thinks that their valves leak, but it is really hard to tell for sure. If you are having to recharge after a few days or weeks, you probably have a leak somewhere else.

The cap is the key part. The shrader valve can leak normally, but the cap will hold the charge in. The fittings on a Civic seem to be standard, having the same threads as most cars. The Interdynamics caps sold at chain stores are really weak plastic and tend to crack. Get a couple of Honda caps off of a junked car or from the dealer. With the cap in place, test with soap water or an electronic detector. Dye doesn't work well here because some dye will blow out every time you uncouple the service hose, so there's always going to be dye around the ports unless you clean it off very throroughly.

Cussboy on Thu October 23, 2008 2:56 PM User is offline

Originally posted by: mk378
The Interdynamics caps sold at chain stores are really weak plastic and tend to crack.

Agree, Interdynamics caps are crap. I actually took them back and got a refund when they cracked so quickly, and I was pretty caeful with them. I bought better-quality replacement caps at CarQuest a mile down the road, color-coded and less expensive to boot.

Edited: Thu October 23, 2008 at 2:58 PM by Cussboy

iceman2555 on Thu October 23, 2008 3:24 PM User is offlineView users profile

Prior to changing the valves...check with a known good leak detector. It is quite possible that the dye is being moved by lubricant and may not necessary indicate a true refrigerant leak. This can occur when the valves are new and trace amounts of dye may seap past the seals. Just check with a detector...may save some time and cash.

The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

lv6l on Fri October 24, 2008 1:20 AM User is offline

My AC is leaking fully out in about a month or two. I took it to a local shop that my friend works at and they check it with the sniffer and only concluded that there is freon leaking both from low and high side ports. We injected dye and a few days later I discover that the high side cap is loose and will not keep a good seal, whee the low side cap can be tighten down very securely. I see green dye coming out from both. If I took off the cap on the high side I can see bubbles coming out one every second and a half. The low side does not appear to have visible leaks but the dye is oozing out and the leak detector gun sniffs that it has freon coming out of it. I'll go get myself a set of Honda caps and see how it works. Thanks.

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