Radiator: Testing and Inspection
CAUTION: Never 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 cleaning tank and they will damage aluminum radiators.NOTE: Always install plugs in the oil cooler fittings before leak-testing or cleaning any radiator. Clean the radiator before leak-testing to avoid contamination of tank.
^ Leak-test the radiator in clean water with 138 kPa (20 psi) air pressure.