Isuzu engine C22NE / 22LE / 20LE. Service manual — part 125

ENGINE LUBRICATION 6G-3

Service Precaution

CAUTION:
Always use the correct fastener in the proper location.
When you replace a fastener, use ONLY the exact part
number for that application. ISUZU will call out those
fasteners that require a replacement after removal. ISUZU
will also call out the fasteners that require thread lockers
or thread sealant. UNLESS OTHERWISE SPECIFIED, do
not use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or fastener
joint interfaces. Generally, such coatings adversely affect
the fastener torque and the joint clamping force, and may
damage the fastener. When you install fasteners, use the
correct tightening sequence and specifications. Following
these instructions can help you avoid damage to parts and
systems.

6G-4 ENGINE LUBRICATION

Oil Pump

Oil Pump and Associated Parts

Legend

1 Oil Pump Assembly
2 Oil Pressure Switch

3 Gasket
4 Sleeve

Disassembly

1. Remove crankshaft timing pulley.

2. Remove oil pan.

3. Remove oil strainer.

4. Remove oil pump assembly.

5. Remove oil pressure switch.

6. Remove gasket.

7. Remove sleeve.

ENGINE LUBRICATION 6G-5

Inspection and Repair

CAUTION: Make necessary correction or parts
replacement if wear, damage or any other abnormal
conditions are found through inspection.

Body and Gears

The pump assembly must be replaced if one or more of the
conditions below is discovered during inspection:
Indentation of gear pair - Use feeler strip and straight edge.

Dimension: 0.03 mm to 0.10 mm

(0.0012 to 0.0039 in)

Oil Strainer

Check the oil strainer for cracking and scoring. If cracking and
scoring are found, the oil strainer must be replaced.

Reassembly

1. Install oil pressure switch to the oil pump.

Torque: 40 N

⋅

m (4.1 kgf.m)

2. Install the oil pump with the sleeve and the gasket.

Torque: 6 N

⋅

m (0.6 kgf.m)

3. Install oil strainer.

Torque: 8 N

⋅

m (0.8 kgf.m)

4. Install the oil pan

Tighten the bolts:

15 N

⋅

m (1.5 kgf.m)

5. Install crankshaft timing pulley.

Tighten the bolts:

20 N

⋅

m (2.0 kgf.m)

6G-6 ENGINE LUBRICATION

Oil Pan

Oil Pan and Associated Parts

Legend

1 Drain Plug
2 Bolts
3.Oil Pan

4 Oil Pan Gasket

Important

Disassembly

1. Loosen a drain plug to drain oil.

2. Remove engine hood.

3. Remove engine rear mounting.

4. Remove transmission assembly.

5. Remove engine front mounting.

6. Raise the vehicle and support with switch stands, and

then remove engine.

7. Remove oil pan.