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Radiator Cap: Testing and Inspection
InspectionRadiator Cap Testing 1.
Remove the radiator cap, wet its seal with engine coolant, and then install it on a pressure tester.
2.
Apply a pressure of 93.16 - 122.58kPa (0.95 - 1.25kgf/cm2, 13.51 - 17.78psi).
3.
Check for a drop in pressure.
4.
If the pressure drops, replace the cap.