Component Tests and General Diagnostics

Supercharger Cooling

Component Tests

Pressure Test

1. Turn the engine OFF.

2. WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
Check the coolant level. Refer to Supercharger Cooling System Draining, Filling and Bleeding Supercharger Cooling System Draining, Filling and Bleeding.

3. Connect the D-Gas Adapter to the degas bottle nipple. Install the Radiator Tester to the quick connect fitting of the D-Gas Adapter.





4. NOTE: If the plunger of the pump is pressed too fast, an erroneous pressure reading will result.
Slowly press the plunger of the pressure test pump until the pressure gauge reading stops increasing and note the highest pressure reading obtained.


5. If the pressure relief cap does not hold pressure, remove and wash the pressure relief cap in clean water to dislodge all foreign particles from the gaskets. Check the sealing surface in the filler neck.

6. If 110 kPa (16 psi) cannot be reached, install a new pressure relief cap. If more than 165 kPa (24 psi) shows on the gauge, install a new pressure relief cap.

7. NOTE: If the pressure drops, check for leaks at the Charge Air Cooler (CAC) hoses or other system components and connections. Any leaks which are found must be corrected and the system rechecked.

NOTE: The Supercharger (SC) system is not connected to the main engine cooling system.

Pressurize the SC (Supercharger) cooling system as described in Step 4 (using a pressure relief cap that operates within the specified upper and lower pressure limits). Observe the gauge reading for approximately 2 minutes; refer to General Specifications. Pressure should not drop during this time.
- If the pressure drops and no external leak is found, the CAC (Charge Air Cooler) may be the cause. Remove and inspect the CAC (Charge Air Cooler). Install a new CAC (Charge Air Cooler) if necessary.


8. Release the system pressure by loosening the pressure relief cap. Check the coolant level and replenish, if necessary, with the correct coolant mixture. Refer to Supercharger Cooling System Draining, Filling and Bleeding Supercharger Cooling System Draining, Filling and Bleeding.

Radiator Leak Test, Removed From the Vehicle

NOTICE: Never leak test an aluminum radiator or Charge Air Cooler (CAC) in the same water that copper/brass radiators are tested in. Flux and caustic cleaners may be present in the tank and they will damage aluminum components.

NOTE: Clean the radiator or CAC (Charge Air Cooler) before leak testing to avoid contamination of tank.

1. Leak test the radiator or CAC (Charge Air Cooler) in clean water with air pressurized to the maximum pressure listed in the Specifications.