DeVille V8-4.6L VIN 9 (1995)
Radiator: Testing and Inspection
Leak Testing - Off-Vehicle
CAUTION: Never use compressed air to pressure test radiator that is not regulated to 138 kPa (20 psi). Pressures over 138 kPa (20 psi.) will damage
the radiator.
NOTE: Do not use boil-out tanks or vats or other tanks the have been used for copper and brass radiators. The flux, acid, and caustic cleaners remaining
in these tanks will attack the aluminum and cause radiator failure. A separate test tank containing clean water is strongly recommended for servicing an
aluminum/plastic radiator.
1. Install test fittings or rubber test caps in the inlet and outlet necks and seal the oil cooler footings with metal plugs to protect the cooler and keep
the fluid from running out.
2. Attach pressure tester and gradually apply air pressure until 138 kPa (20 psi) is attained. Do not exceed 138 kPa (20 psi). Check pressure gage to
see if there is a pressure loss. To ensure that there are no small leaks, run water over the repair area and look for bubbles. (A mild detergent is very
helpful.) If a large water tank is available, the radiator can be submerged, and a check for air bubbles can be made.
