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Radiator Leak Test, Removed From the Vehicle

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
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.
NOTE: Clean the radiator before leak-testing to avoid contamination of tank.
  1. Leak-test the radiator in clean water with 138 kPa (20 psi) air pressure.
  2. If a stream of air bubbles is observed coming from the radiator, note the location and install a new radiator.
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