Vac-N-Fill Procedure
Install the GE-42401-2 Adapter Assembly (3) to the radiator surge tank.
- Install the GE-42401-3 Radiator Test Adapter - Female (2) to the radiator surge tank.
- Install the GE-47716-8 Vac-N-Fill Cap (1) to GE-42401-A Radiator Test Adapter - Female (2).
Attach the vacuum gauge assembly (1) to the GE-47716-8 Vac-N-Fill Cap (2).
Attach the fill hose (1) to the barb fitting on the vacuum gauge assembly (2).
Ensure that the valve is closed.
- Prepare a quantity of coolant slightly greater than the cooling system capacity.
- Inspect the concentration of the engine coolant using the GE-26568 Coolant and Battery Fluid Tester.
Pour the coolant mixture into the graduated reservoir (1).
- Place the fill hose in the graduated reservoir (1).
- Install the vacuum tank (2) on the graduated reservoir with the fill hose routed through the cut-out area (3) in the vacuum tank.
Attach the venturi assembly (1) to the vacuum tank (2).
Attach a shop air hose to the venturi assembly (1).
Ensure the valve (2) on the venturi assembly is closed.
Attach the vacuum hose (1) to the vacuum gauge assembly (2) and the vacuum tank (3).
- Clamp off the overflow hose.
Open the valve (1) on the venturi assembly (2). The vacuum gauge will begin to rise and a hissing noise will be present.
Continue to draw vacuum until the needle stops rising (1). This should be 610 - 660 mm Hg (24 - 26 in Hg).
Cooling hoses may start to collapse. This is normal due to vacuum draw.
- To aid in the fill process, position the graduated reservoir above the coolant fill port.
Slowly open the valve (1) on the vacuum gauge assembly (2). When the coolant reaches the top of the fill hose, close the valve. This will eliminate air from the fill hose.
- Close the valve on the venturi assembly.
- If there is a suspected leak in the cooling system, allow the system to stabilize under vacuum and monitor for vacuum loss.
If vacuum loss is observed, refer to Loss of Coolant (LT4) .
- Open the valve on the vacuum gauge assembly. The vacuum gauge will drop as coolant is drawn into the system.
Once the vacuum gauge reaches zero (1), close the valve on the vacuum gauge assembly and repeat steps 11 - 17.
Detach the vacuum gauge assembly (1) to the GE-47716-8 Vac-N-Fill Cap (2).
Remove the GE-47716-8 Vac-N-Fill Cap (1) from GE-42401-A Radiator Test Adapter - Female (2).
- Remove the GE-42401-3 Radiator Test Adapter - Female (2) from the radiator surge tank.
- Remove the GE-42401-2 Adapter Assembly (3) from the radiator surge tank.
Radiator Surge Tank Cap (1) - Install
- Start the engine.
- Run the engine at 2, 000 - 2, 500 RPM until the engine reaches it's normal operating temperature.
- Allow the engine to idle for 3 minutes.
- Turn the engine OFF.
- Allow the engine to cool.
- Fill the cooling system to the proper level.
- Check the cooling system for leaks.
- Rinse away any excess coolant from the engine and the engine compartment.
- The vacuum tank has a drain valve on the bottom of the tank.
- Open the valve to drain coolant from the vacuum tank into a suitable container for disposal.
To prevent boiling of the coolant/water mixture in the vehicles cooling system, do not apply vacuum to a cooling system above 49°C (120°F). The tool will not operate properly when the coolant is boiling.
Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.
Always use more coolant than necessary. This will eliminate air from being drawn into the cooling system.
Prior to installing the vacuum tank onto the graduated reservoir, ensure that the drain valve located on the bottom of the tank is closed.