If no indication of leakage is found from the cylinder head,
check for cylinder block counterbore leaks. Refer to Pro-
cedure 7-13.
Cooling System Pressure Testing
(1-11)
Warning: Wait until the temperature is below 50°C
[120°F] before removing the coolant system pressure
cap. Failure to do so can cause personal injury from
heated coolant spray.
To confirm and locate external cold coolant leaks, it is not
necessary to warm the engine.
Check the coolant level and fill if necessary.
NOTE: Add Heavy Duty Coolant. Refer to the front of this
section for description.
To confirm and locate external coolant leaks that occur
during normal engine operation, complete this test while
the engine is warm.
If the radiator is equipped with a pressure relief valve,
install a plug in the overflow tube (1).
Caution: Do not apply more than 140 kPa [20 psi] air
pressure to the cooling system. The water pump seal
may be damaged.
Install the pressure tester on the radiator fill neck or surge
tank (if equipped), and apply 140 kPa [20 psi] maximum
air pressure.
Section 1 - Cooling System Cooling System Pressure Testing (1-11)
N14 Page 1-33
To Next Page
Loading...
