Pressure Testing Cooling System

Pressure Testing Cooling System:

1. Check breather hose between radiator and expansion tank. Replace hose if worn or cracked.
2. Connect pressure tester between radiator and expansion tank.
3. Increase pressure and check opening pressure of expansion tank cap and for leaks:
- opening pressure 65-85 kPa (9.2-12.0 psi).
- check that pressure does not drop noticeably during 30 seconds.