Charge Air Cooler - Leak Test
- Verify coolant level of the Low Temperature Radiator (LTR) coolant reservoir.
- If the fluid is low, and no external leak is found, a pressure test of the Charge Air Coolers (CAC) must be performed.
- Disconnect the LTR hoses (1) from the coolant crossover at the rear of the supercharger to isolate and complete a pressure check of the CAC circuit.
- Securely seal the lower nipple (2).
- Apply shop air pressure to the upper nipple (1), regulated down to 20 PSI maximum.
- As alternative connection for the pressure test, both upper and lower nipples may be securely capped off, then apply shop air, regulated down to 20 PSI maximum, through the 1/8 inch fitting (1).
- Determine if the system maintains pressure or if it leaks down over time.
- If a leak is detected, remove the supercharger lid and visually inspect for the source of the coolant leak, while maintaining system pressure. Refer to COOLER, CHARGE AIR, REMOVAL .
- If the leak source was not identified, remove the system pressure and remove the coolant crossover manifold. Refer to MANIFOLD, COOLANT CROSSOVER, REMOVAL .
- Inspect the CAC O-rings for damage and evidence of rolling.NOTE:
O-rings must be replaced prior to reassembly.
- Individually pressurize and test one CAC at a time to determine the source of the leak.
- Replace any leaking CAC as necessary. Refer to COOLER, CHARGE AIR, REMOVAL .
- After installation, recheck the CAC for leaks before installing the supercharger lid.
