x2 
can you identify these?
TECH Apprentice
Joined: Mar 2006
Posts: 326
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Originally Posted by Imnotfast
YES and I am the teacher! THE CAPS ARE NOT TO DO ANYTHING BUT KEEP THE TAPS CLEAN. Your talking about pressure of 270 PSI and a little rubber seal on a platic cap is not going to hold it. HVAC engineering is what I do for one of the biggers suppliers to heavy truck and auto makers. So before taste your knee caps better learn what parts are.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
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From: Decatur, TN (N-W of Athens)
Schrader valves are check valves. If they're not meant to hold in pressure, and the plastic caps are, then I'll make soup out of my dirty socks.
Notice it says leaky. When something leaks it's gone bad. You don't intentionally design something to leak, more-so when it's meant to hold in something under pressure...
A valve cap is essential on a Schrader valve because if one is not fitted, dirt and water can enter the outside of the valve, potentially jamming it or contaminating the sealing surfaces and causing a leak. Metal valve caps usually have a small rubber insert to permit a good seal against the valve body; a cap of this kind also helps to prevent air escaping from a slightly leaking valve. However, the vast majority of Schrader valves used for tires are fitted with plastic caps which effectively serve only to keep contaminants out of the valve stem.
...pressure inside a Schrader valve will hold the valve shut, but because the Schrader valve has a spring, it closes and stays closed even without pressure.
What it sounds like is some hack repair person did the wrong thing. If the Schrader is leaking even after replacing then the fitting needs to be replaced. Then again what do I know the Lambda's AC system should never work
He is also camparing a R22 system to a 134A system with differant service fittings.
He is also camparing a R22 system to a 134A system with differant service fittings.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
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From: Decatur, TN (N-W of Athens)
Originally Posted by the_merv
Let me know how you do that, I am about to turn some Goat **** into Gasoline.. 
TECH Apprentice
Joined: Mar 2006
Posts: 326
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Originally Posted by Imnotfast
What it sounds like is some hack repair person did the wrong thing. If the Schrader is leaking even after replacing then the fitting needs to be replaced. Then again what do I know the Lambda's AC system should never work
He is also camparing a R22 system to a 134A system with differant service fittings.
He is also camparing a R22 system to a 134A system with differant service fittings.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Shall we settle this once and for all? I'll run with my schrader off my fuel line for a few weeks, and see how much fuel is there. I'll even rubber band a plastic bag around it to keep it from evaporating. You, well you can keep yours on since all your schraders leak.
Hows that sound?
Hows that sound?
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Verdad Gallardo TECH Apprentice
Joined: Mar 2006
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Originally Posted by Formula350
Shall we settle this once and for all? I'll run with my schrader off my fuel line for a few weeks, and see how much fuel is there. I'll even rubber band a plastic bag around it to keep it from evaporating. You, well you can keep yours on since all your schraders leak.
Hows that sound?
Hows that sound?
Just for giggles I will take a fitting remove the valve and install a cap then charge it see what happens. Will even make a test request for this just to see how far the cap will fly. Try and get it done tomorrow and post pic's
TECH Apprentice
Joined: Mar 2006
Posts: 326
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Originally Posted by Imnotfast
Just for giggles I will take a fitting remove the valve and install a cap then charge it see what happens. Will even make a test request for this just to see how far the cap will fly. Try and get it done tomorrow and post pic's
Be sure to install an appropriate pressure restriction, might i advise a schrader valve with an old worn seal as is common in automotive applications.
No you said the the caps are what hold the system pressure in not the schrader valve. "I said schraders tend to leak, they are put there for convenience when servicing so you don't have to worry about refrigerant leaking out when the caps are off."
Schrader's are VALVES not a restriction. TXV is the restriction in the F-body cars.
THis is my last post on this as the point was made to you many times and by many other people.
Schrader's are VALVES not a restriction. TXV is the restriction in the F-body cars.
THis is my last post on this as the point was made to you many times and by many other people.
when i still had ac......i lost the cap with the rubber seal and put one for a tire on there.......it still didnt leak any freon with no rubber seal......they are just there to keep it from being exposed........
stupidest argument ever btw
stupidest argument ever btw
TECH Apprentice
Joined: Mar 2006
Posts: 326
Likes: 0
Originally Posted by Imnotfast
No you said the the caps are what hold the system pressure in not the schrader valve. "I said schraders tend to leak, they are put there for convenience when servicing so you don't have to worry about refrigerant leaking out when the caps are off."
Schrader's are VALVES not a restriction. TXV is the restriction in the F-body cars.
THis is my last post on this as the point was made to you many times and by many other people.
Schrader's are VALVES not a restriction. TXV is the restriction in the F-body cars.
THis is my last post on this as the point was made to you many times and by many other people.
Originally Posted by LiENUS
Those two ports without caps really need their caps, the schrader valves in them are not supposed to keep refrigerant from leaking out while you are driving around, they are there for convenience when recharging the system the caps that screw into them are actually what is supposed to keep refrigerant from leaking out during daily use, the valves just keep refrigerant from leaking out during the hour or so you are recharging the system.
Originally Posted by cbrrmike
when i still had ac......i lost the cap with the rubber seal and put one for a tire on there.......it still didnt leak any freon with no rubber seal......they are just there to keep it from being exposed........
stupidest argument ever btw
stupidest argument ever btw
