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Restoration - GM POA Valves
Due to market changes, we have made the hard decision to no longer offer restoration services. We do offer replacement upgrade kits and bolt in aftermarket kits to cover the void.
What does a POA valve do?
All air conditioning systems have something built into the system to prevent the evaporator from getting so cold that it freezes up. In some systems, this mechanism is a thermostat, but in most mid 60's to mid 70's GM vehicles, it's a POA (Pilot Operated Absolute) Valve.
A thermostat prevents the Evaporator from freezing by cycling the compressor on and off based on evaporator temperature. A POA Valve prevents the evaporator from freezing by by-passing excessive system pressure. Note that in a POA Valve type system, the compressor runs constantly whenever the air conditioning system is operating.
Why have my POA valve calibrated, reconditioned or rebuilt?
If you are converting to 134a, your car's POA valve will need to be calibrated to by-pass at different pressures. We offer 134a calibration with any reconditioning or rebuilding service.
A good indication that your POA Valve may be failing is a high low-side system gauge reading, a normal high-side system gauge reading and no cooling.
Click here for Frequently Asked Questions about POA Valves
| BUICK | |
|---|---|
| Buick Skylark, GS & Special late 65-73 | 15-51 Type-1 |
| Buick Electra late 65-72 | 15-52 |
| Buick LeSabre late 65-72 | 15-52 |
| Buick Riviera 66-70 | 15-51 |
| Buick Riviera 71-72 | 15-52 |
| Buick Wildcat late 65-70 | 15-52 |
| CADILLAC | |
| Cadillac late 65-early 73 | 15-52 |
| CHEVROLET | |
| Chevy Corvette 67-72 | 15-51 Type-1 |
| Chevy Camaro 67 | 15-51 Type-1 |
| Chevy Camaro 68-69 | 15-51 Type-2 |
| Chevy Camaro 70 | 15-51 Type-1 |
| Chevy Camaro 71-73 | 15-52 |
| Chevy Chevelle 66-68 | 15-51 Type-1 |
| Chevy Chevelle 69-72 | 15-51 Type-2 |
| Chevy Chevelle 73 | 15-51 Type-1 |
| Chevy El Camino 66-68 | 15-51 Type-1 |
| Chevy El Camino 69-72 | 15-51 Type-2 |
| Chevy El Camino 73 | 15-51 Type-1 |
| Chevy Impala & Caprice 66 | 15-51 |
| Chevy Impala & Caprice 67-73 | 15-52 |
| Chevy Monte Carlo 70-73 | 15-51 Type-2 |
| Chevy Monte Carlo 73 | 15-51 Type-1 |
| Chevy II/Nova 68 | 15-51 Type-1 |
| Chevy II/Nova 69-early 74 | 15-51 Type-2 |
| Chevy & GMC Truck 67-72 | 15-51 Type-1 |
| Chevy Vega 71-72 | 15-52 |
| OLDSMOBILE | |
| Olds Cutlass, 442 & F85 late 65-mid 73 | 15-51 Type-1 |
| Olds Delta 88/98 late 65-73 | 15-52 |
| Olds Toronado 66-70 | 15-51 Type-1 |
| Olds Toronado 71-72 | 15-52 |
| PONTIAC | |
| Pontiac Bonneville 65-70 | 15-51 Type-1 |
| Pontiac Bonneville 71-mid 73 | 15-52 |
| Pontiac Catalina 65-70 | 15-51 Type-1 |
| Pontiac Catalina 71-mid 73 | 15-52 |
| Pontiac Grand Prix late 65-70 | 15-52 |
| Pontiac Grand Prix 71-early 73 | 15-51 Type-1 |
| Pontiac GTO, LeMans & Tempest 66-72 | 15-51 Type-1 |
| Pontiac Firebird 67-69 | 15-51 Type-1 |
| Pontiac Firebird 70-73 | 15-52 |