Ranger 2WD V6-3.0L VIN U (1998)
Radiator Cap: Testing and Inspection
1. Inspect the radiator cap and seals for damage or deterioration. Replace the radiator cap if necessary.
2. Fit the radiator cap to Radiator/Heater Core Pressure Tester Kit using the aftermarket adapter.
3. Slowly pump the pressure tester until the pressure gauge stops increasing and note the highest pressure reading. Release pressure and repeat the
test. Replace the radiator cap if the pressure is not 99.3-121.4 kPa (14.4-17.6 psi).
NOTE: If the plunger of the pressure tester is depressed too fast, an incorrect pressure reading will result.