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Low & High Valve cores

73Wagoneer on Sun April 06, 2008 9:17 PM User is offline

Year: 94
Make: Honda
Model: Civic
Engine Size: 1.5
Refrigerant Type: r134
Ambient Temp: 80
Pressure Low: 25
Pressure High: 200

I have a small leak, A/C charge last for approx for 1 month, I have dye in the system and cannot locate any leak,(visual) no damp spot around connections, then today I went to vac and charge and noticed when I remove the Low side plastic cap, I heard a small hiss, so I am thinking that the valve core is not seating all the way. When I do a vac it holds at 25 over night, obviously I would have to leave my guages on there for a month to see if I had a leak elsewhere in the system, am I going in the right direction???? The plastic cap covering the service port does have a seal underneath it, is it really suppose to close the system???


does ACKITS carry the valve core (high and Low side) with plastic cap for a 94 Honda Civic, seems like a cheap starting place?????


Robert

TRB on Sun April 06, 2008 9:49 PM User is offlineView users profile

Yes we should have a few cores and caps some where around our place.

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Contact: ACKits.com

73Wagoneer on Sun April 06, 2008 9:51 PM User is offline

Ok I will give you a call tomarow,


Does this seem like a logical starting place???


Rob

TRB on Sun April 06, 2008 10:08 PM User is offlineView users profile

One month and you're empty is a pretty good size leak. Even a new core can leak a little and is the reason caps have o-rings in them.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

mk378 on Mon April 07, 2008 9:47 AM User is offline

The cores always leak a little, the cap holds it in. Everyone thinks that their service ports leak but it's often somewhere else. You may have one of those leaks that leaks under pressure but not vacuum. Go over very thoroughly looking for the UV dye. There will always be dye around the ports from coupling and uncoupling the hoses so it won't tell you anything there, but look other places.

Dave in Texas on Mon April 07, 2008 11:14 AM User is offlineView users profile

A leaking valve core is simple to diagnose. Use the tried&true method of covering the core-opening with spit, or soapy-water. A bad core will make a bubble of either substance. Some valve cores use a rubber seal which can deteriorate over time and to contamination. Some cores use a plastic seal that is probably better for refrigerant containment. Bad cores will lose vacuum/suck moisture into the system under vacuum and leak refrigerant under pressure.

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At 2, I went home with a 10. At 10 I woke up with a 2 !!

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