Radiator Cap: Testing and Inspection

Radiator Cap Test

1. Wait until the engine is cool, then carefully remove the radiator cap (A). Wet the radiator cap seal with engine coolant, then install it on a commercially available pressure tester (B).





2. Apply a pressure of 93.3-122.7 kPa (0.951-1.251 kgf/cm2, 13.53-17.80 psi).

3. Check for a drop in pressure.

4. If the pressure drops, replace the radiator cap.