Engine Size: 3.1L
Refrigerant Type: 134A
Country of Origin: United States
Does any one have a temp / pressure chart I can use for this car ?
Also , where is the orifice physically located , in the engine compartment ?
The compressor locked down this last winter . Replaced it and the accumulator . Bought the orifice , but could not locate where it was ( Hays manual did a poor job of describing / showing this ) .
Can this be gotten to w/o removing other parts ?
A/C worked fine until a week or so ago .
What kind of pressure readings are commonly seen if the orifice is stopped up ?
I put some more 134A in the system this PM . 35 - 40 PSI low - 225 - 250 PSI high - 90 degrees F out side air .
Neither line to the accumulator is even cool , much less cold .
Dual driver / passenger controls . 80 degree air - driver side , 60 degree air - passenger side .
I think my mom had one of those cars. On it the two service ports were right next to each other on a line on the right fender. The OT is in the joint between them.
I suspect you have a blocked condenser, and the new compressor is about shot now too because of debris from the first one that wasn't cleaned out.
If you had a compressor lock up (the compressor part, not just the pulley bearing), it was grinding itself up inside before finally locking up. The bits of metal went into the condenser first, and most of them will lodge there because the passages inside a modern condenser are quite small.
Do you have the ports next to each other on the pipe between the condenser and evaporator, or some other arrangement? The OT is always somewhere in the pipe between the condenser and the evaporator. Some cars had it built in so you hac to replace the entire pipe but I think that was mostly a Ford thing. The GM should have it at what looks like a normal connection betwwen two parts. There will be 3 dimples crimped into the pipe about 3 inches downstream from the coupling nut. The dimples hold the tube in place inside the pipe.
Hey Folks- This is a GM "W" car- the OT is below the brake module- you must remove the brake module to access it---
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
Got it to cooling , thanks for all the help .
See my thread on the 2002 Buick Century power brake vacuum booster , if anyone is interested in " The rest of the story. "
I had to move the booster out of the way to get at the orifice tube fittings .
The OT was indeed mostly stopped up .
Edited: Mon July 21, 2008 at 4:27 AM by WyrTwister
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