1965 Grand Prix STV Rebuild Kit
STV Rebuild Kit
Suction Valves were used on most 60’s and 70’s GM Vehicles. They are mounted to the Evaporator’s suction (top) outlet and regulate system pressures so as to prevent the Evaporator from freezing up.
The STV (Suction Throttling Valve) is a particular kind of Suction Valve used on many 1962-1966 GM vehicles, including the early 1965 Grand Prix. 1965 was a split year for Grand Prix air conditioning design with the Suction Valve on the early models being a Suction Throttling Valve and on the later a POA Valve.
This STV (Suction Throttling Valve) Rebuild Kit is for the early 1965 Grand Prix's and includes the valve body diaphragm, O-rings and screen clip.
If you prefer, we can rebuild your early 1965 Grand Prix Suction Throttling Valve for you.
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A good indication that your Suction Valve has failed or is failing is a high low-side system gauge reading. This is either as a result of contaminants locking the valve or clogging the valve or valve failure. If you are converting to 134a, your Suction Valve will need to be recalibrated as by-pass pressures differ from that of R12. More on converting to 134a.
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Air Conditioning Tip
If you are replacing your STV on an otherwise operating system, its failure is likely as a result of contaminants causing it to stick in the open position, forcing it to constantly by-pass. As is the case with any air conditioning system, flushing the system to insure that re-used parts do not contaminate newly replaced or restored parts and replacing or restoring the car’s Filter-Drier are essential to avoid a repeat of the same problem.
All car air conditioning systems need a mechanism to keep the Evaporator from getting so cold that it freezes. In some systems, this mechanism is a thermostat. In the early model 1965 Pontiac Grand Prix’s, it was an STV (Suction Throttling Valve). A thermostat prevents the Evaporator from freezing by cycling the Compressor on and off based on Evaporator temperature. An STV prevents the Evaporator from freezing by by-passing excessive system pressure. Note that in an STV type system like the early model 1965 Pontiac Grand Prix’s, the Compressor runs constantly whenever the air conditioning system is operating.
Frequently Asked Questions
Air Conditioning Solutions for your 1965 Pontiac Grand Prix
- S6 Replacement Compressor
- 1965 Grand Prix Condenser
- 1965 Grand Prix Air Condtioning Controls
- 1965 Grand Prix Evaporator
- 1965 Grand Prix Air Conditioning Hoses, Lines & Fittings
- 1965 Grand Prix Expansion Valve
- 1965 Grand Prix Air Conditioning POA Valve
- 1965 Grand Prix Filter-Drier
- 1965 Grand Prix Heater
- 1965 Grand Prix Air Conditioning Repair and Rebuild Services
- Other Replacement Parts?
- CONVERTING TO 134a