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BEFORE & AFTER - Air-Conditioning & Heating

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Evaporator Units - Chevy, Chevy Truck, Pontiac
Heater Boxes - Chevy, Chevy Truck, Pontiac
Heater Controls (A/C & Heat) - Chevy, Chevy Truck, Pontiac
Valves - Hot Gas Valve, Suction Throttling Valve, VIR

EVAPORATOR UNIT

CHEVROLET EVAPORATOR UNITS

1963-65 Chevy Corvette A/C Evaporator Unit

Rebuild for one of our customers that wasn't extremely particular, like most C2 Corvette owners.
This unit was built using a new evaporator, blower motor, resistor, high-fan relay and replacement expansion valve.
The housing was restored, with a few minor repairs.

The support clamp between the two pieces was missing, so we fabricated one for function purposes.
The STV (Suction Throttling Valve) was not provided for us to rebuild.
INTERCHANGE - For the most part, these units are the same for 1963, 1964 & 1965 Corvette with factory air-conditioning.

1966 Chevy Corvette A/C Evaporator Unit

Rebuild for one of our customers that wasn't extremely particular, like most C2 Corvette owners.
This unit was built using a new evaporator, blower motor, resistor, high-fan relay and replacement expansion valve.
Thee housing was bead-blasted and repainted.

The support clamp between the two pieces was missing, so we fabricated one for function purposes.
The STV (Suction Throttling Valve) was not provided for us to rebuild.
INTERCHANGE - For the most part, these units are the same for 1963, 1964 & 1965 Corvette with factory air-conditioning.

1980-82 Chevy Corvette A/C Evaporator Unit

It was built with a new evaporator, accumulator, orifice tube, blower motor, drain tube and blower resistor.

The housing was restored to it's original finish after some minor fiberglass repairs.

The rear metal shroud also had a few minor repairs, made using fiberglass.
This unit is correct only for 1980-82 models, but can be used on 1977-79 cars as well with no modifications.

1967 Chevy Camaro A/C Evaporator Unit (Small-Block)

It was built with a new evaporator, 134a POA eliminator valve, expansion valve, blower motor and drain tube.

The housing was restored to it's original finish after some minor fiberglass repairs to the inboard housing.
This unit is correct only for 1967 small-block models.

1966 Chevy Impala A/C Evaporator Unit

It was built with a new evaporator, Billet POA Upgrade/Eliminator valve, expansion valve and blower motor.

The housing was restored to it's original finish after replacing heavily damaged inboard case half.
NOTE - There were two different versions of these units in 1966. The early versions used a suction throttling valve, while later versions (like this one) used a POA valve.

1967 Chevy Impala A/C Evaporator Unit

It was built with a new evaporator, 134a POA eliminator valve, expansion valve and blower motor.

The housing was restored to it's original finish after replacing heavily damaged inboard case half.
This unit is correct only for 1967 models.

1970 Chevy Impala A/C Evaporator Unit

Restored for Chris H, the housing was restored to it's original finish after a minor fiberglass repair.
It was built with a new evaporator, 134a POA eliminator valve, expansion valve and blower motor.
The ambient sensor switch and blower switches were cleaned & tested to function correctly.

This unit is the same for 1969-70 full-size Chevy models, with the only difference between
ATC (Automatic Temperature Control) and Manual A/C being the a/c blower resistor.

CHEVY TRUCK EVAPORATOR UNITS

1967-72 Chevy Truck A/C Evaporator Unit

Built with a new evaporator, 134a POA eliminator valve, expansion valve and blower motor.
The housing was refinished after some minor fiberglass repairs.

The metal shroud on the back, normally found rotted away, did need some repairs that we made using fiberglass.
This unit is the same for 19697-72 Chevy trucks.

1973 Chevy "Square Body"1973 Chevy "Square Body" Truck A/C Evaporator Unit

The evaporator housing was restored to it's original finish.
A new evaporator, orifice tube, accumulator, blower motor assembly and resistor were installed.
The entire unit was sent back ready to bolt up to the firewall, connect hoses and wiring and use!

1995-99 Chevy Truck A/C Evaporator Heater Plenum Unit

The evaporator housing was restored to it's original finish.
A new evaporator, heater core, orifice tube, blower motor, resistor, both actuators & drain hose were installed.
The entire unit was set up ready to install back in the dashboard, connect the rest of the ducting, wiring and a/c & heater hoses.

PONTIAC EVAPORATOR UNITS

1968 Pontiac Firebird EVAPORATOR UNIT

Built with a new evaporator, resistor, blower motor, new Billet style POA Eliminator Upgrade valve that closely resembles the original Frigidaire POA valve.
The housing was restored to it's original finish after a few minor fiberglass repairs.
The original Frigidaire expansion valve was reconditioned & zinc-plated.
The ambient sensor switch was cleaned & tested to function correctly.

For the most part, this unit fits 1967-69 Firebird & 1967-68 Camaro with Big-Block engine with only a handful of difference.

1970 Pontiac Firebird EVAPORATOR UNIT

This unit was originally a 70 Camaro unit, but was built for a customer who needed one for a Firebird.

The housing was restored to it's original finish after a few minor fiberglass repairs.
It was built with a new evaporator, 134a POA eliminator valve, expansion valve, resistor and blower motor.
The ambient sensor switch was cleaned & tested to function correctly.

For the most part, these units are the same from 1970, 1971, 1972 and 1973 Chevy Camaro & Pontiac Firebird, with only a handful of difference.

1969-72 Pontiac Grand Prix EVAPORATOR UNIT

The unit was built with a new evaporator, 134a POA eliminator valve, expansion valve and blower motor.
The resistor was cleaned & tested to function correctly. The fiberglass housing was had a few minor fiberglass

repairs, then refinished.

Often confused as the same as all 1968-72 GM A-Body cars. (like Chevelle, GTO/LeMans, Skylark, Cutlass)
This unit is unique to 1969-72 Grand Prix, with the main difference being the thickness of the outboard (fender-side)

to accommodate a larger blower wheel. Also, the inboard case does not have an indent the notch those cars, and does

have a large "G" on it.

This unit is the same for 1969-72 Grand Prix.

HEATER BOXES

CHEVROLET HEATER BOXES

1968 Camaro A/C Heater Box

The unit was built with a new aluminum heater coil.
The low blower switch was acid dipped/cleaned, lubricated & tested to function correctly,
The fiberglass housing was refinished. All the original seals were in good condition.
The original plastic directional ducting, often found rotted away or brittle, was in excellent pliable condition.

This came out of a 68 Chevy Camaro but it will also fit 1968 Chevrolet Nova and 1968 Pontiac Firebird with factory air-conditioning and all engine combinations.

1969 Camaro A/C Heater Box

The unit was built with a new aluminum heater coil.
The fiberglass housing was refinished. All the original seals were in good condition.

This came out of a 69 Chevy Camaro but it will also fit 1969-74 Chevolet Nova, 1971-74 Pontiac Ventura II, 1974 Pontiac GTO, 1973-74 Oldsmobile Omega and 1973-74 Buick Apollo with factory air-conditioning and all engine combinations.

1970 Impala A/C Heater Box

Restored for Chris H, the unit was built with a new aluminum heater coil.
The fiberglass housing was refinished. The foam diverter door was replaced.
Both actuators were cleaned & tested to function correctly.
This unit is the same for all 1969-70 Impala with manual factory air-conditioning.
NOTE - Cars with ATC (Automatic Temperature Control) use a different heater box to accommodate installation of the power servo.

CHEVY TRUCK HEATER BOXES

1987 Chevy Truck A/C Heater Box

Rebuild of Dylan T's 87 Chevy truck a/c heater box.
As is often the case with the mid 1985 & newer square body trucks, this unit was damaged when someone tried to replace the heater core, (These are VERY tricky to disassemble without damaging!) and the inner housing was literally broken in half. We fixed it, cleaned & tested the actuators, restored the rest of the housing, installed a new diverter door deal and calibrated so doors function correctly.

PONTIAC HEATER BOXES

1965-67 Pontiac GTO, LeMans & Tempest A/C Heater Box

A new aluminum heater coil was installed.

The metal housing was bead-blasted and repainted.

The fiberglass housing was refinished.

The foam door seals were replaced.

Both vacuum actuators were cleaned and tested.

For the most part, these units are the same from for 1965, 1966 & 1967 GTO, LeMans & Tempest with factory air-conditioning.

1969-72 Grand Prix A/C Heater Box

The unit was built with a new aluminum heater coil.
The fiberglass housing was refinished. The foam diverter door was replaced.
All three actuators were cleaned & tested to function correctly.
This unit is the same for all 1969-70 Impala with manual factory air-conditioning.

HEATER CONTROLS (A/C & HEAT)

CHEVY CONTROLS (A/C & HEAT)

1969 Chevy Camaro & 1969-70 Chevy Nova A/C Heater Control

The vacuum mode, fan/blower speed & master switches were acid dipped/cleaned, lubricated and tested to function correctly.
The body, often tweaked out of shape, was straightened. Broken lever tips were been replaced.
Knobs were buffed out and/or replaced as needed.
The chrome bezel was detailed and a new lens with green lettering was installed.
NOTE - FITS 69 Camaro & 1969-70 Nova with factory air-conditioing.
Also fits 1971-74 Nova, but a lens with white lettering is used.

1964-65 Chevy Chevelle A/C Heater Control

The entire control was completely dismantled.
Each lever was cleaned, bead-blasted & painted and slide smoothly; one lever was replaced.
Plastic sliders were replaced as needed.
The fan switch was acid cleaned, lubricated & tested to function correctly.
The chrome knobs were in rough condition, so new billet knobs were installed.
The chrome bezel was detailed and a new lens with green lettering was installed.
NOTE - Fits 1964-65 Chevelle & El Camino with factory air-conditioning.

1970-72 Chevy Chevelle A/C Heater Control

The entire control was completely dismantled.
The fan switch, master clicker switch, heater clicker switch switch, heater vacuum switch and vacuum mode switch
were all acid cleaned, lubricated & tested to function correctly.
Knobs were buffed out and/or replaced as needed.
The bezel is was been removed, repainted black and riveted back in place.
NOTE - Correct for 70 Chevelle with factory air-conditioing. Also fits
1971-72 models, but a lens with white lettering is used.

Chevy Impala

1957 Chevy Belair Heater Control (Non-A/C)

The fan/blower speed switch was acid cleaned/dipped, lubricated & tested to function correctly.
The body & levers were bead-blasted zinc plated.
The original knobs were cleaned and are in nice condition.
A NEW lens has been installed.
The chrome bezel & surround were cleaned and buffed, with only some minor pitting

1963 Chevy Impala A/C Heater Control & Non-A/C Heater Control

The entire control was completely dismantled.
Each lever was cleaned, bead-blasted & painted and slide smoothly.
Plastic sliders were replaced as needed.
The fan switch was acid cleaned, lubricated & tested to function correctly.
The chrome bezel was cleaned and buffed with only some minor pitting.
The chrome knobs were cleaned and buffed and replaced as needed.
NOTE - This control was used on 1963 models with factory air-conditioning, as well as factory heater.

1967 Chevy Impala A/C Heater Control (Version-2)

The vacuum, fan/blower and two terminal master switches*** was acid cleaned/dipped, lubricated and tested to function correctly.
The chrome bezel was cleaned & the nickel inset has been repainted.
A NEW lens has was installed. Knobs were buffed out and/or replaced as needed.

*** NOTE - This control includes a two-terminal, non-vacuum master switch. Two different versions were sued in 1967.
The first version used a 2 electrical terminal & 1 vacuum terminal.
The 2nd one (like this one) only had two electrical terminals. Occasionally both were used.

1969-70 Chevy Impala Heater Control (Non-A/C)

The fan switch was acid dipped, lubricated & tested to function correctly!
All levers were greased to slide freely! Broken lever tips were replaced.

Knobs were buffed out and/or replaced as needed.
The chrome bezel was detailed and a NEW lens was been installed.

Chevy Truck

1960-63 Chevy Truck Deluxe Heater Control

1983-87 Chevy Truck AC Heater Control

The vacuum mode, electrical mode & fan switches were acid cleaned/dipped, lubricated, and tested to function correctly.
A new lens was installed.
The knobs were buffed out and replaced as needed.

Chevy Van A/C & Heater Controls

1971-72 Chevy Van Heater Control (Non-A/C)

Pontiac A/C & Heater Controls

1968 Pontiac Firebird A/C Heater Control

1969 Pontiac Firebird A/C Heater Control

Late 76-77 Pontiac Firebird/Trans-Am A/C Heater Control

The vacuum mode, electrical mode & fan switches were acid cleaned/dipped, lubricated, and tested to function correctly.
A new lens was installed.
The knobs were cleaned and replaced as needed.

1964 Pontiac GTO/LeMans A/C Heater Control

1965 Pontiac GTO/LeMans A/C Heater Control

1966-67 Pontiac GTO/LeMans A/C Heater Control

1968 Pontiac GTO/LeMans A/C Heater Control

1969 Pontiac GTO/LeMans A/C Heater Control

VALVES

HOT GAS BY-PASS VALVES

Also called a suction valve, suction throttle valve, POA valve and other names, this is the piece that mounts beside the a/c compressor, in the engine compartment.

Its function is to regulate pressure to insure the evaporator coil does not freeze.

1961 Buick A/C Hot-Gas Bypass Valve

The entire valve was disassembled and the exterior metal components were all zinc-plated.
All the o-rings and internal diaphragms were replaced.

TECH NOTE - The main causes of failure of these valves is moisture and/or contamination in the system.
If your a/c system is not thoroughly flushed clean, the oil is not changed in the compressor and the filter-drier is not replaced or rebuilt, this valve will fail prematurely.

Original built to be used with the old R12 refrigerant, but can be calibrated for the newer 134a refrigerant during the charging process.
This is done by removing the lever and using a specialized tool to adjust the nut inside the shaft to get the low side reading to 20psi.
(The old R12 would be set at 30psi.) This can only be done once the full charge of refrigerant has been added to the system. We cannot provide this tool.

SUCTION THROTTLING VALVES

Also called a suction valve, suction throttle valve, POA valve and other names, this is the piece that mounts on the top fitting of the evaporator unit, mounting on the passenger-side firewall.

Its function is to regulate pressure to insure the evaporator coil does not freeze.

1962 Cadillac A/C Suction Throttling Valve (STV)

The entire valve has been dismantled, cleaned, a new internal diaphragm and valves stems were installed, reassembled and pressure tested. The vacuum actuator was replaced with New Old Stock.

Originally built to be used with the old R12 refrigerant, but can be calibrated for the newer 134a refrigerant during the charging process.
This is done by removing the cap, adjusting the rod inside with a flat-head screw driver to adjust the low side pressure to 20psi. (The old R12 would be set at 30psi.) This can only be done once the full charge of refrigerant has been added to the system.

1963-66 Chevy Corvette A/C Suction Throttling Valve (STV)

The entire valve has been dismantled, cleaned, a new internal diaphragm and valves stems were installed, reassembled and pressure tested. The vacuum valve was tested for proper function.

This valve is exceptionally rare, fitting only 1963-66 Corvette with factory air-conditioning.

VIR (Valves-In-Receiver)

73-76 GM VIR (Valves-In-Receiver)

The entire unit was disassembled, the expansion and POA valves were both reconditioned.
The upper and lower caps were bead-blasted and zinc-plated yellow.

The o-rings, sight-glass, valve stems and dessicant bag were all replaced.

The unit as a whole was pressure tested with Nitrogen.

TECH NOTE - The #1 cause of failure in a VIR is contaminants such as dirty oil and debris.
It is imperative that the internal portion of your a/c system is clean and free of contaminants

as it will cause the valves in the VIR will clog and your system will fail. This will not be covered under warranty.

ALL USED, REBUILT & RECONDITIONED PRODUCTS HAVE LIMITED AVAILABILITY &
NOT ALL PRODUCTS PICTURED ARE AVAILABLE
ALL INVENTORY IS SUBJECT TO AVAILABILITY & PRICES ARE SUBJECT TO CHANGE AT ANY TIME.

Questions or Stock Requests
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Ordering Information
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` BEFORE & AFTER - Air-Conditioning & Heating

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BEFORE & AFTER - Air-Conditioning & Heating