Radiator: Testing and Inspection

EXTERNAL INSPECTION

NOTE: With the introduction of a new radiator braze process, there is no approved service method for repairing radiator core leaks. Due to the type of flux used during brazing, the two component epoxy materials previously used will not adhere to the aluminum radiator core. If the radiator core leaks, the radiator (8005) should be replaced.

The aluminum core can be cleaned externally with a soft bristle brush, warm water and a mild household liquid detergent. Rinse with clear water. If the vehicle is equipped with an automatic transmission, install steel or brass plugs in the transmission oil cooler fittings before cleaning. Keep them installed during the entire service operation.

INTERNAL INSPECTION

NOTE: Do not use caustic cleaning solutions or copper/brass radiator cleaning agents on aluminum radiators.

Internal cleaning of the aluminum tubes can be accomplished with sonic cleaning equipment. Rinse the core with clean water when completed. Do not use a metal brush to clean an aluminum core. Use only horsehair, bristle or nylon brushes.

RADIATOR LEAK TEST, REMOVED FROM VEHICLE

NOTE: Do not leak-test an aluminum radiator in the same water that copper/brass radiators are tested in. Flux and caustic cleaners may be present in the tank and will damage aluminum. A separate clean test tank is necessary for aluminum radiators. If conditions do not allow a separate tank for aluminum radiator leak-testing, thoroughly clean the test tank each time before testing an aluminum radiator in the tank.

1. Clean the radiator before leak-testing to prevent contaminating the test tank.
2. Leak-test the radiator in clean water with 138 kPa (20 psi) air pressure.
3. Install plugs in the transmission oil cooler fittings before leak testing or cleaning any radiator equipped with a transmission fluid cooler (7A095).