Isuzu 4JB1, Service Information

Page: 39 / 60

SERVICE INFORMATION 00 – 41
1. Find a safe place to park the vehicle.
2. Open the engine hood and place a container
(Approximately 0.2 liter capacity) at the end of the
vinyl hose beneath the drain plug on the separator.
3. Loosen the drain plug by turning it counterclockwise
(Approximately 5 turns) and operate the priming pump
up and down about 10 times until water is drained
approximately 0.1 liter.
4. After draining, securely tighten the drain plug by
turning it clockwise and operate the priming pump
manually up and down several times.
5. After starting the engine, check to see that there is no
fuel leak from the drain plug. Also check to see that
the fuel filter water indicator light has turned off.
If water separator requires frequent draining, have the
fuel tank drained for removal of water at your Isuzu
Dealer.
Air Bleeding
1. Loosen the bleeder screw on the injection pump
overflow valve.
2. Operate the priming pump until fuel mixed with foam
flows from the bleeder screw.
3. Tighten the bleeder screw.
4. Operate the priming pump several times and check
for fuel leakage.
COOLING SYSTEM
Coolant Level
Check the coolant level and replenish the radiator reserve
tank as necessary.
If the coolant level falls below the “MIN” line, carefully
check the cooling system for leakage. Then add enough
coolant to bring the level up to the “MAX” line.
Engine coolant change procedure
1. To change engine coolant, make sure that the engine
is cool.
WARNING:
When the coolant is heated to a high
temperature, be sure not to loosen or remove
the radiator cap. Otherwise you might get
scalded by hot vapor or boiling water. To open
the radiator cap, put a piece of thick cloth on the
cap and loosen the cap slowly to reduce the
pressure when the coolant has become cooler.
2 Open radiator cap and drain the cooling system by
loosening the drain valve on the radiator and on the
cylinder body.
0041-2.tif
0041-3.tif
0041-4.tif
0042-1.tif