Tools Required

J 24460-01 Cooling System and Cap Pressure Tester

Caution: Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine, fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at any time. Flammable antifreeze could cause a serious fire.

1. Remove the radiator cap.
2. Wet the radiator cap gasket with water. Wash off any sediment from the sealing surface.



3. Install the cap to the J 24460-01 .
4. Pump up the pressure to 103 kPa (15 psi) by operating the plunger handle of the J 24460-01 .
5. Note the rate of decrease in pressure.
6. The pressure reading should remain within the corresponding pressure segment of the scale for about 10 seconds.
7. If the cap does not hold the corresponding pressure, replace the cap.