GENERAL DESCRIPTION
Legend
1 Oil Strainer
2 Oil Pump
3 Relief Valve
4 Oil Filter
5 Safety Valve
6 Oil Gallery
7 Crankshaft Bearing
8 Crankshaft
9 Connecting Rod Bearing
10 Connecting Rod
11 Piston
12 Oil Gallery; Cylinder Head
13 Camshaft
14 Camshaft Journal
15 HLV
16 Check relief valve
17 Oil Pan
A gear-type oil pump is directly driven by the crankshaft and
draws oil from the oil pan, via the suction pipe. If then passes
the pressured oil through a full-flow disposable oil filter, to the
main oil gallery in the cylinder Block. Oil pump pressure relief
valve and oil filter bypass valves are incorporated in the
system.
From the main oil gallery in the cylinder block, the cylinder
head and crankshaft main bearings are supplied with oil.
The camshaft bearings and hydraulic tappets are supplied
through the main feed galleries in the cylinder head. Vent
valves allow air to be expelled from the oil galleries in the
cylinder head. The balance shaft journals are directly fed from
the crankshaft main bearings. The connecting rod bearings are
fed via passages in the crankshaft. The oil returns to the oil
pan via passages in the cylinder block.
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.
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)
OIL PAN
OIL PAN AND ASSOCIATED PARTS
Legend
1 Drain Plug
2 Bolts
3.Oil Pan
4 Oil Pan Gasket
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.
INSPECTION AND REPAIR
CAUTION:
Make necessary correction or parts replacement if wear,
damage or any other abnormal conditions are found
through inspection.
REASSEMBLY
To install follows the disassembly steps in the reverse order.
IMPORTANT:
Sealer - Apply silicon into groove in oil pan lugs prior to fitment
of oil pan to block, remove excess sealer after oil pan
is bolted to block.
TORQUE
Bolts - Tighten bolts to the specified torque.
Torque : 15 Nm (1.5 kgfm)
Engine oil - Refill engine oil to the oil pan. (Lit)
Without filter change 4.40
With filter change 4.70