Isuzu engine 4j series. Manual — part 50
6A1 – 68 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE
INSTALLATION
7. Camshaft and Tappets
•
Apply a coat of engine oil to the tappet and the cylinder
body tappet insert holes.
•
Locate the position mark applied at disassembly (if the
tappet is to be reused).
NOTE:
The tappet must be installed before the camshaft.
•
Apply a coat of engine oil to the camshaft and the
camshaft bearings.
•
Install the camshaft to the cylinder body.
Take care not to damage the camshaft bearings.
6. Oil Pump Assembly
•
Prepare a solution of 80% engine oil and 20%
molybdenum disulfide.
•
Apply and ample coat of the solution to the teeth of the
oil pump pinion.
•
Apply engine oil to oil pipe O-ring and insert the O-ring
in O-ring hold on cylinder block.
•
Install oil pump asm with oil pipe in cylinder block and
tighten fixing bolts to the specified torque.
Oil Pump Bolt Torque
N∙m (kg∙m/lb∙ft)
19 (1.9/14)
•
Tighten sleeve nut to the specified torque.
Sleeve Nut Torque
N∙m (kg∙m/lb∙ft)
25 (2.5/18)
5. Oil Pan Assembly
Above works refer to “OIL PAN” Section in this manual.
4a. Timing Belt
8) Camshaft timing pulley
7) Timing belt
6) Flange: injection pump pulley
5) Flange: camshaft pulley
4) Timing pulley lower cover
3) Timing pulley upper cover
2) Crankshaft damper pulley
1) Cooling fan assembly
Above works refer to “TIMING BELT (Belt Type)”
Section in this manual.
6A1-68-1.tif
6A1-68-2.tif
4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 69
4. Timing Gear (Gear Type)
6) Camshaft timing gear
5) Timing gear case cover
4) Noise cover spacer
3) Noise shield cover
2) Crankshaft damper pulley
1) Cooling fan assembly
Above works refer to “TIMING GEAR (Gear Type)”
Section in this manual.
3. Cylinder Head Assembly and Gasket
12) Cylinder head gasket
Piston Head Projection Measurement Point
11) Cylinder head assembly
10) Push rod
9) Rocker arm shaft
Valve Clearance Adjustment
8) Cylinder head cover
7) By-pass hose
6) Oil cooler water pipe (Oil cooler Model)
5) Oil level gauge guide tube
4) Glow plug harness
3) PCV hose
2) Fuel leak off pipe
1) Injection pipe
Above works refer to “CYLINDER HEAD ASSEMBLY
AND GASKET” Section in this manual.
2. Engine Assembly
14) Engine assembly
13) Support rubber
12) Front exhaust pipe
11) Vacuum pump hose
10) Actuator vacuum hose
9) Power steering pump & bracket assembly (With Power
Steering Model)
8) A/C compressor assembly (A/C Model)
7) Oil pressure switch harness
6) Fuel hose
5) Glow plug harness
4) Engine control cable
3) Heater hose
2) Intake air duct
1) Radiator assembly
6A1 – 70 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE
1. Transmission and Clutch Assembly
2) Clutch
1) Transmission
Above works refer to “ENGINE ASSEMBLY” Section in
this manual.
•
Connect the battery ground cable.
•
Pour coolant
•
Pour engine oil
•
Start the engine and check coolant leakage.
4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 71
CRANKSHAFT FRONT OIL SEAL (Gear Drive Type)
REMOVAL
Preparation:
•
Disconnect battery ground cable.
•
Drain coolant.
1. Fan Shroud
2. Power Steering Pump Drive Belt
•
Loosen power steering pump mounting bolt and adjust
bolt, and remove the drive belt.
3. AC Generator Drive Belt
•
Loosen AC Generator mounting bolt (under side) and
adjust plate lock bolt, and remove the drive belt.
4. Cooling Fan Assembly
•
Remove clamp nut, and remove cooling fan assembly,
distant pipe, and fan pulley.
5. Crankshaft Damper Pulley
6A1-71-1.tif
Removal steps
1. Fan shroud
2. Power steering pump drive belt
3. AC generator drive belt
4. Cooling fan Assembly
5. Crankshaft damper pulley
6. Front oil seal
Installation steps
To install, follow the removal steps
in the reverse order.
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