Isuzu engine 4j series. Manual — part 36
6A1 – 12 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE
OIL COOLER (Oil Cooler Model)
REMOVAL
Preparation:
•
Disconnect battery ground cable
•
Drain coolant
•
Put rag to beneath side of oil cooler to prevent oil
leaking.
1. Water Hose
•
Disconnect water inlet and outlet hose.
2. Oil Cooler Fixing Bolt
3. Oil Cooler
6A1-12-1.tif
4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 13
INSPECTION
Relief Valve
1. Attach an oil pressure gauge to the oil gallery near the
oil filter.
2. Start the engine to check the relief valve opening
pressure.
Relief Valve Opening Pressure
kPa (kg/cm
2
/psi)
Type1
559-618 (5.7-6.3/81.0-89.6)
Type2
422-461 (4.3-4.7/61.1-66.8)
Oil Cooler
Check for water leakage at the water passage.
1. Plug one side of the oil cooler water passage.
2. Submerge the oil cooler in water.
3. Apply compressed air (2 kg/cm
2
(28.5psi/196.0kPa)) to
the other side of the oil cooler water passage.
If air bubbles rise to the surface, there is water
leakage.
INSTALLATION
3. Oil Cooler
•
Install the O-ring to oil filter body and set the oil cooler.
2. Oil Cooler Fixing Bolt
Oil Cooler Bolt Torque
N∙m (kg∙m/lb∙ft)
29 (3.0/22)
1. Water Hose
•
Connect water hose.
6A1-13-1.tif
6A1-13-2.tif
6A1-13-3.tif
6A1 – 14 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE
OIL FILTER CARTRIDGE
REMOVAL
•
Place a receptacle beneath the oil filter to contain the
drained oil.
•
Remove the oil filter cartridge using filter wrench.
Filter wrench: 5-8840-0200-0
INSTALLATION
•
Lightly oil the O-ring of oil filter cartridge.
•
Turn in the new oil filter cartridge by hand until the
sealing face is fiffted against the O-ring.
•
Use the filter wrench to turn in the oil filter and
additional one and 1.1/8 turns.
•
Start the engine and check for oil leakage from oil
filter.
6A1-14-1.tif
6A1-14-2.tif
4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 15
CYLINDER HEAD COVER
REMOVAL
Preparation:
•
Disconnect battery ground cable.
1. PCV Hose
•
Disconnect the PCV hose from intake pipe side.
2. Cylinder Head Cover
INSTALLATION
2. Cylinder Head Cover
•
Apply engine oil to the rocker arms and the valve
springs.
•
Install the cylinder head cover gasket to the cylinder
head cover.
•
The gasket must be perfectly smooth with no loose
areas.
•
Tighten the cylinder head cover nuts to the specified
torque.
N∙m (kg∙m/lb∙ft)
13 (1.3/9)
6A1-15-1.tif
6A1-15-2.tif
Removal steps
1. PCV hose
2. Cylinder head cover
Installation steps
To install, follow the removal steps in
the reverse order.
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