Leaky high pressure fitting
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Leaky high pressure fitting
I've got a '94 ranger and the AC has stopped working. The compressor kicks on for 1-2 seconds and then turns off. I checked the charge and it was low so I tried to add some freon but as I was adding it I could hear it squeaking out of the high pressure fitting.
I confirmed that the high pressure fitting was leaking by removing the cap and putting my thumb over it, creating a seal. Enough pressure would build up behind it so that I eventually couldn't hold it back.
I tried depressing the button in the valve core to see if it would pop back up and seal better but it would not.
Is there a way to replace the valve core like on a shrader tire valve? Or, am I stuck spending the $130 on a replacement hose assembly for that side?
I confirmed that the high pressure fitting was leaking by removing the cap and putting my thumb over it, creating a seal. Enough pressure would build up behind it so that I eventually couldn't hold it back.
I tried depressing the button in the valve core to see if it would pop back up and seal better but it would not.
Is there a way to replace the valve core like on a shrader tire valve? Or, am I stuck spending the $130 on a replacement hose assembly for that side?
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Junior User
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Looks like this might be what I need:
http://www.acsource.com/index.asp?Pa...ROD&ProdID=535
I figure I could get it evacuated at a shop, swap out the valve and then recharge it. Any trick to swapping out one of those or is it just like swapping a sparkplug?
http://www.acsource.com/index.asp?Pa...ROD&ProdID=535
I figure I could get it evacuated at a shop, swap out the valve and then recharge it. Any trick to swapping out one of those or is it just like swapping a sparkplug?
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
The valve core is replacable but you will have to have the system evacuated first. Keep in mind that the plastic cap is actually the primary seal for the service ports on MVAC systems. The high side schrader valve will always leak a bit. The replacement caps from AutoZone and others are crap. An OEM style cap is needed to prevent leaks.
Why don't you have the shop replace the valve? You'll have to have them evacuate the system before recharging anyway, unless you have a vacuum pump.
Why don't you have the shop replace the valve? You'll have to have them evacuate the system before recharging anyway, unless you have a vacuum pump.
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I got the valve at Pep Boys and replaced it.
When I was trying to recharge it the compressor wasn't cycling though. I didn't fool with it much but it seemed that the system pressure equalized with the low side but the compressor still didn't start running.
Any ideas on why the compressor wouldn't run? Everything on the controls was in the correct, on position.
When I was trying to recharge it the compressor wasn't cycling though. I didn't fool with it much but it seemed that the system pressure equalized with the low side but the compressor still didn't start running.
Any ideas on why the compressor wouldn't run? Everything on the controls was in the correct, on position.
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
Originally Posted by JefFZ6
I got the valve at Pep Boys and replaced it.
When I was trying to recharge it the compressor wasn't cycling though. I didn't fool with it much but it seemed that the system pressure equalized with the low side but the compressor still didn't start running.
Any ideas on why the compressor wouldn't run? Everything on the controls was in the correct, on position.
When I was trying to recharge it the compressor wasn't cycling though. I didn't fool with it much but it seemed that the system pressure equalized with the low side but the compressor still didn't start running.
Any ideas on why the compressor wouldn't run? Everything on the controls was in the correct, on position.
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Originally Posted by lsrx101
Sounds like you vented the charge and replaced the valve. That means the system is empty. You do know that you need to pull the system into a vacuum before recharging, right?
Thanks,
Jeff
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Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
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From: Lorain County, Ohio
Originally Posted by JefFZ6
No, I did not. I talked to our mechanic at work and he didn't mention anything about that.
Thanks,
Jeff
Thanks,
Jeff
Did you lose any oil when you vented the refrigerant? If so, you need to add that back before charging as well.
Take a look at this article on how to evacuate and charge the system. There's more to it than just adding refrigerant:
http://www.autoacforum.com/messagevi...&threadid=7931
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Originally Posted by hhott71
Please let the professionals do this kind of work.
Thanks,
Jeff
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
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From: Lorain County, Ohio
Originally Posted by hhott71
Please let the professionals do this kind of work.
For some that advice would be sound, but for many folks who inhabit this forum some education would be in order before proceeding. Working blindly with AC systems can cause damage to the system or personal injury, but it's not rocket science. The same can be said of many other systems on a motor vehicle.
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