Engine Size: 350
Refrigerant Type: R12
I tried the test from the tips page to see if the pressure was correct on the POA valve for R12. I hooked it up as described. I attempeted to put the 60psi in and it just went straight thru the POA and out the other end. It did not build up any pressure unlecc i put my hand over the other end.
POA from a 71 Pontiac Lemans.
Would this be a stuck open valve?
with the low side handwheel closed, does the low side read 28 to 32?
It doesn't read anything. It just goes out the other end and does not buil pressure.
It is bad then
Thanks, I sent it off to Florida to get looked at.
Not to hijack this thread, but wasn't sure if I should start a new one either, so here it goes.....
I have two valves, one that was in the system for the last year, and this summer compressor seal went, so I evac system and had compressor fixed. While it has been apart, I thought I would test POA... I put 70 psi in and get about 29-30 out (R-12 system). Just hear air coming out at that pressure, can't really tell if I hear a pop initially or not.
Second valve I try and get about 26 psi on the low side, and the air coming out sounds "throaty" for a better lack of terms.
So the question I have is does it matter what it sounds like when doing the POA valve test or not? I know that one valve is too low for pressure, that valve is adjustable, the other one is not.
Okay, I just tested both valves again, and yes the one I do hear a pop initially, and get 29-30 on low side gauges.
The other valve does need to be adjusted, because I get 27 on low side gauge. The "throaty" sound I think is the valve popping constantly, so is that normal or not?
I am planning on using the one that gives me the 29-30. That was a NOS valve just opened and installed last summer, the other is a used one I got a while back.
If have heard that throaty sound while testing/setting some POA's. I just set them ...never heard that they di not work.
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