Pressure Test

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.

3. Connect the Radiator/Heater Core Pressure Tester to the degas bottle nipple. Install a pressure test pump to the quick connect fitting of the test adapter.






4. NOTE: If the plunger of the pump is depressed too fast, an erroneous pressure reading will result.

Slowly depress 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 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 may be the cause. Remove and inspect the CAC.

Install a new CAC 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.