Inspection - Isuzu 2000 Trooper Workshop Manual

6B–10 ENGINE COOLING
6. Disconnect the reserve tank hose(4) from radiator.
7. Remove bracket(5).
8. Lift up and remove the radiator assembly with hose,
taking care not to damage the radiator core with a fan
blade.
9. Remove rubber cushions on both sides at the bottom.

Inspection

Radiator Cap
Measure the valve opening pressure of the pressurizing
valve with a radiator filler cap tester.
Replace the cap if the valve opening pressure is outside
the standard range.
Valve opening pressure kPa (psi) 88.3 ∼ 117.7
(12.8 ∼17.1)
Cap tester: J–24460–01
Adapter: J–33984–A
Check the condition of the vacuum valve in the center of
the valve seat side of the cap. If considerable rust or dirt is
found, or if the valve seat cannot be moved by hand, clean
or replace the cap.
Valve opening vacuum kPa (psi) 1.96 ∼ 4.91
(0.28 ∼ 0.71)
110RW004
Radiator Core
1. A bent fin may result in reduced ventilation and
overheating may occur. All bent fins must be
straightened. Pay close attention to the base of the fin
when it is being straightened.
2. Remove all dust, bugs and other foreign material.
Flushing the Radiator
Thoroughly wash the inside of the radiator and the engine
coolant passages with cold water and mild detergent.
Remove all signs of scale and rust.
Cooling System Leakage Check
Use a radiator cap tester to force air into the radiator
through the filler neck at the specified pressure of 196 kPa
(28.5 psi) with a cap tester:
D Leakage from the radiator
D Leakage from the coolant pump
D Leakage from the water hoses
D Check the rubber hoses for swelling.
110RS006