Radiator Cap: Testing and Inspection

WARNING:
^ Under some conditions, the ethylene glycol in engine coolant is combustible. To help avoid being burned, do not spill antifreeze or coolant on the exhaust system or hot engine parts.
^ Do not remove the radiator cap when the radiator is warm. Removing the cap immediately lowers the boiling point of the coolant and could cause a violent overflow, resulting in a large coolant loss and personal injury.

^ Tools Required:
- J 24460-01 Cooling System Tester
- J 33984-A Radiator Test Adapter
- Or Equivalents

1. Cooling system for leaks and cracked pipes or hoses. Repair or replace pipes and/or hoses as necessary.
2. Coolant reservoir level and freeze protection.
3. Cooling system pressure capacity using a cooling system tester and a radiator test adapter. If cooling system does not maintain 90 kPa (13 psi) for two minutes, check for coolant leaks.
4. Radiator cap pressure using a cooling system tester and a radiator test adapter. If radiator cap does not maintain 90 kPa (13 psi) for two minutes, replace cap.