Search
Filters

VIR Eliminator Kit - 73-76 GM (Exc. Corvette/Cadillac; VIR equipped only.)

Everything necessary to replace the VIR, converting the system to a clutch-cycling system. Assuming all components in the system are functional, simply remove the VIR and install this kit.
SKU: 15-211
$109.99

1973*-1976 GM

VIR ELIMINATOR KIT

This listing is for a new VIR Eliminator/Upgrade kit for all 1973*-76 GM Cars with factory air-conditioning (exc Corvette/Cadillac).

WHY DO I NEED TO ELIMINATE MY VIR?

Unlike nearly every other General Motors designed systems, VIRs cannot be calibrated differently from the factory setting.
As a result, VIR equipped cars cannot be adequately converted to 134a.

Our eliminator kit is a simple, cost-effective alternative to using R12 or a poorly converted 134a system by updating the system to the newer accumulator clutch cycling system that GM converted to in 1977 and continues to use today.

WILL I NEED TO MODIFY MY CAR OR PARTS?


You will be splicing the cycling switch harness into the compressor power wire. Assuming all components in the system are functional, simply remove the VIR and install this kit. Unlike some similar kits, this kit will not require modification to the car's original hoses.

ON SOME VEHICLES EQUIPPED WITH ENGINE COMPARTMENT SUPPORT BRACKETS, THE BRACES MAY NEED TO BE MODIFIED OR REMOVED IN ORDER TO CLEAR THE NEWLY INSTALLED ACCUMULATOR.

WILL I NEED TO BUY ANYTHING ELSE?

This kit includes everything necessary to replace the VIR, converting the system to a clutch-cycling system. Assuming all components in the system are functional, simply remove the VIR and install this kit.

 

*Some 1973 and early 1974 models use a POA Valve instead of a VIR. Please double check your application before ordering.

1973*-1976 GM

VIR ELIMINATOR KIT

This listing is for a new VIR Eliminator/Upgrade kit for all 1973*-76 GM Cars with factory air-conditioning (exc Corvette/Cadillac).

WHY DO I NEED TO ELIMINATE MY VIR?

Unlike nearly every other General Motors designed systems, VIRs cannot be calibrated differently from the factory setting.
As a result, VIR equipped cars cannot be adequately converted to 134a.

Our eliminator kit is a simple, cost-effective alternative to using R12 or a poorly converted 134a system by updating the system to the newer accumulator clutch cycling system that GM converted to in 1977 and continues to use today.

WILL I NEED TO MODIFY MY CAR OR PARTS?


You will be splicing the cycling switch harness into the compressor power wire. Assuming all components in the system are functional, simply remove the VIR and install this kit. Unlike some similar kits, this kit will not require modification to the car's original hoses.

ON SOME VEHICLES EQUIPPED WITH ENGINE COMPARTMENT SUPPORT BRACKETS, THE BRACES MAY NEED TO BE MODIFIED OR REMOVED IN ORDER TO CLEAR THE NEWLY INSTALLED ACCUMULATOR.

WILL I NEED TO BUY ANYTHING ELSE?

This kit includes everything necessary to replace the VIR, converting the system to a clutch-cycling system. Assuming all components in the system are functional, simply remove the VIR and install this kit.

 

*Some 1973 and early 1974 models use a POA Valve instead of a VIR. Please double check your application before ordering.

CONVERTING GENERAL MOTORS CARS

TO 134a

Until 1995, most cars with air conditioning used R-12 Freon refrigerant that is said to have a negative side effect of damaging the ozone layer and is no longer produced in most countries. since then, the industry standard has been R134a, which is an efficient replacement.  Contrary to popular belief, most cars originally equipped with R-12 can be converted to 134a and still keep you just as cool.

 

1955-61 Models with Hot Gas Valve (aka By Pass or Hot Gas By Pass Valve)

The Hot Gas Valve is most often found mounted to the compressor, though some cars have it mounted back near the evaporator. The front half of it looks like a bullet. (Click here for a typical photo)

Minimum Requirements

  • Change or restore the filter-drier.
  • Drain the compressor oil and recharge with 134a compatible oil. (PAG or Ester Oil)
  • Insure that the system is clean and free of contaminants (Depending on component condition, this may be a simple matter of blowing out with compressed air or liquid flushing with an air-conditioning flushing agent)
  • Replace or restore all rubber hoses with barrier hose.
  • Rebuild hot gas valve.
  • Install 134a charge port adapters.
  • Charge with 134a between 70-80% of the original R12 charge amount. Note: Hot gas valve will need to be adjusted during the charging process to properly adjust the low side by-pass pressure to 20psi.
  • Replace any o-rings with 134a compatible.

Recommended:

  • Install hi/lo pressure switch

HELPFUL HINTS

  • Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass.
  • Typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount.

 

1962-66 Models with Suction Throttling Valve (aka STV)

The suction throttling valve is installed on the evaporator, near the firewall.(Click here for a typical photo)

Minimum Requirements

  • Change or restore the filter-drier.
  • Drain the compressor oil and recharge with 134a compatible oil. (PAG or Ester Oil)
  • Insure that the system is clean and free of contaminants (Depending on component condition, this may be a simple matter of blowing out with compressed air or liquid flushing with an air-conditioning flushing agent)
  • Replace or restore all rubber hoses with barrier hose.
  • Rebuild suction throttling valve.
  • Install 134a charge port adapters.
  • Charge with 134a between 70-80% of the original R12 charge amount. Note: Suction throttling valve will need to be adjusted during the charging process to properly adjust the low side by-pass pressure to 20psi.
  • Replace any o-rings with 134a compatible.

Recommended:

  • Install hi/lo pressure switch

HELPFUL HINTS

  • Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass.
  • Typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount.

 

1966-73 Models with POA Valve

The POA Valve is installed on the evaporator, near the firewall. (Click here for a typical photo)

Minimum Requirements

  • Change or restore the filter-drier.
  • Drain the compressor oil and recharge with 134a compatible oil. (PAG or Ester Oil)
  • Insure that the system is clean and free of contaminants (Depending on component condition, this may be a simple matter of blowing out with compressed air or liquid flushing with an air-conditioning flushing agent)
  • Replace or restore all rubber hoses with barrier hose.
  • Install 134a charge port adapters.
  • Have POA valve recalibrated/rebuilt for 134a, or replaced with a POA Delete Kit
  • Charge with 134a between 70-80% of the original R12 charge amount.
  • Replace any o-rings with 134a compatible.

Recommended:

  • Install hi/lo pressure switch

HELPFUL HINTS

  • Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass.
  • Typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount.

 

1973-76 Models with VIR

The VIR is installed on the evaporator, near the firewall. (Click here for a typical photo)

Minimum Requirements

  • Change desiccant in VIR.
  • Drain the compressor oil and recharge with 134a compatible oil. (PAG or Ester Oil)
  • Insure that the system is clean and free of contaminants (Depending on component condition, this may be a simple matter of blowing out with compressed air or liquid flushing with an air-conditioning flushing agent)
  • Replace or restore all rubber hoses with barrier hose.
  • Install 134a charge port adapters.
  • Charge with 134a between 70-80% of the original R12 charge amount.
  • Replace any o-rings with 134a compatible.

Recommended:

  • Install hi/lo pressure switch
  • Install our VIR Eliminator (strongly recommended when converting to 134a), purchase a rebuilt VIR or let us rebuild yours.

HELPFUL HINTS

  • Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass.
  • Typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount.

 

1977-Newer Models with Accumulator

The accumulator is most often installed on the evaporator, near the firewall. (Click here for a typical photo)

Minimum Requirements

  • Change or restore the accumulator.
  • Drain the compressor oil and recharge with 134a compatible oil. (PAG or Ester Oil)
  • Insure that the system is clean and free of contaminants (Depending on component condition, this may be a simple matter of blowing out with compressed air or liquid flushing with an air-conditioning flushing agent)
  • Replace or restore all rubber hoses with barrier hose.
  • Install 134a charge port adapters.
  • Charge with 134a between 70-80% of the original R12 charge amount.
  • Replace any o-rings with 134a compatible.

Recommended:

  • Install hi/lo pressure switch
  • Upgrade the standard orifice-tube to a variable orifice tube.

HELPFUL HINTS

  • Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass.
  • Typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount.
Product tags