Leak Testing

Some core leaks can be detected by adding water to the radiator. Clean the core so that the damaged area can be found.
1. Remove dirt and insects from the fins with a common water hose without a nozzle. Excessive water pressure could damage the fins.
2. Scrub the core with a soft-bristle brush using clean, hot water or hot water with a mild detergent.

CAUTION: Pressure above 138 kPa (20 psi) should not be used when pressure testing the cooling system. Pressures over 138 kPa (20 psi) will damage the radiator.