1.
Remove the radiator cap, wet its seal with engine coolant, and install it to a pressure tester.
Remove the radiator cap, wet its seal with engine coolant, and install it to a pressure tester.
Apply a pressure of 93 ~ 123kPa (0.95 ~ 1.25kgf/cm², 14 ~ 19psi).
Check for a drop in pressure.
If the pressure drops, replace the cap.
