Vac-N-Fill Procedure
GE-42401-2 Adapter Assembly (3) - Install
- GE-42401-3 Radiator Test Adapter - Female (2) - Install
- GE-47716-8 Vac-N-Fill Cap (1) - Install
Attach the vacuum gauge assembly (1) to the 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 vehicle specific mixture of DEX-COOL antifreeze and clean, drinkable water in a quantity that equals the maximum capacity of the cooling system:
- Inspect the concentration of the coolant mixture using GE-26568 Coolant and Battery Fluid Tester.
- NOTE:
Prior to installing the vacuum tank onto the graduated reservoir, ensure that the drain valve located on the bottom of the tank is closed.
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).
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).
Coolant 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 venture 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 (LSY) .
- 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 15 - 22.
GE-47716-8 Vac-N-Fill Cap (1) - Remove
- GE-42401-3 Radiator Test Adapter - Female (2) - Remove
- GE-42401-2 Adapter Assembly (3) - Remove
- Adjust the cooling system to the proper level. Adhesives, Fluids, Lubricants, and Sealers
- If the cooling system level is over the maximum level allowed within the radiator surge tank, perform steps 28 - 31 until the correct level is achieved.
- Detach the vacuum hose form the vacuum gauge assembly.
Attach the extraction hose (1) to the vacuum hose (2).
Open the valve (1) on the venturi assembly (2) to start a vacuum draw.
Use the extraction hose (1) to draw out coolant to the proper level.
- 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.
- Install the radiator surge tank cap.
The vehicle is quipped with an automatic coolant service fill (ACSF) feature that assists with removing air while filling the cooling system.
Use the vehicle's specified concentration of DEX-COOL coolant and clean drinkable water to fill the cooling system during this process.
Always use more coolant than necessary. This will eliminate air from being drawn into the cooling system.
After filling the cooling system, the extraction hose can be used to remove excess coolant to achieve the proper coolant level.