F 150 4WD Pickup V8-4.6L SOHC VIN W (1998)
Radiator Cap: Testing and Inspection
1. Inspect the pressure relief cap and seals for damage or deterioration. Replace the pressure relief cap if necessary.
2. Fit the presure relief cap to Radiator/Heater Core Pressure Tester Kit using the after market adapter.
NOTE: If the Plunger of the pressure tester is depressed too fast, an incorrect pressure reading will result.
3. Slowly pump the pressure tester until the gauge stops increasing and note the highest pressure reading. Release pressure and repeat test. Replace
pressure relief cap if the pressure is not 99.3-121.4 kPa (14.4-17.6 psi).
