Isuzu engine 4j series. Manual — part 46

6A1 – 52 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE

2. Engine Mount Bolts

•

Remove the engine mount bolts right & left side.

3. Stiffener & Space Rubber

•

Remove the exhaust pipe bracket.

•

Remove the stiffener from of the oil pan left & right
side.

•

Take out space rubber.

4. Oil Pan Assembly

•

Raise the engine about 50mm.

•

Remove the oil pan from cylinder block.

5. Oil Pump Assembly

•

Remove the oil pump from cylinder block.

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4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 53

INSTALLATION

•

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.

5. Oil Pump Assembly

•

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.

N∙m (kg∙m/lb∙ft)

19 (1.9/14)

•

Tighten sleeve nut to the specified torque.

N∙m (kg∙m/lb∙ft)

25 (2.5/18)

4. Oil Pan Assembly

3. Stiffener & Space Rubber

2. Engine Mount Bolts

1. Vacuum Pump Oil Hose

Above works refer to “OIL PAN” Section in this manual.

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6A1 – 54 4JB1/4JB1T/4JB1TC/4JG2 - ENGINE

PISTON, PISTON RING AND CONNECTING ROD

REMOVAL

Preparation:

•

Disconnect battery ground cable

•

Drain coolant

•

Drain engine oil

NOTE

•

Install drain plug with new washer.

N∙m (kg∙m/lb∙ft)

44 (4.5/33)

1. Cylinder Head Assembly

1) Radiator hose upper
2) Heater hose
3) A/C compressor drive belt
4) Engine harness
5) Air intake duct

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4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 55

6) Injection pipe
7) Leak off pipe
8) PCV hose
9) Glow plug harness
10) Oil level gauge guide tube
11) Oil cooler water pipe (Oil Cooler Model)
12) A/C compressor assembly (A/C Model)
13) Vacuum actuator hose (Exhaust Brake Model)
14) Front exhaust pipe
15) By-pass hose
16) Cylinder head cover
17) Rocker arm shaft
18) Push rod
19) Cylinder head assembly
20) Cylinder head gasket

Above works refer to “CYLINDER HEAD ASSEMBLY
AND GASKET” Section in this manual.

2. Oil Pan Assembly

1) Vacuum pump oil hose
2) Engine mount bolt
3) Stiffener and spacer rubber
4) Oil pan

Above works refer to “OIL PAN” Section in this
manual.

3. Oil Pump Assembly

4. Piston Cooling Oil Pipe

•

Remove the relief valve and oil pipe.

5. Connecting Rod Bearing Cap

•

If the connecting rod lower bearings are to be
reinstalled, mark their fitting positions by tagging each
bearing with the cylinder number from which it was
removed.

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