Page 344 of 1082
01-20
Oil pumpOil panOil filter module
6. LUBRICATION SYSTEM
Oil pressure switchOil jetEngine oil gauge
Page 351 of 1082

02-51116-01
Name Size Quantity Tightening torque
Intake manifold lower bracket bolt M8 X 1.25 X 16 425 ± 2.5 Nm
Exhaust manifold nut - 740 ± 5 Nm
Heat protector bolt M6 X 1.0 X 25 710 ± 1 Nm
Oil jet bolt - 410 ± 1 Nm
Oil pump bolt M8 X 1.25 X35 325 ± 2.5 Nm
Oil filter assembly assembly bolt M8 X 1.25 X30 325 ± 2.5 Nm
Oil filter assembly assembly bolt M8 X 1.25 X65 125 ± 2.5 Nm
Water pump bolt M6 X 1.0 X22 110 ± 1 Nm
Belt tensioner upper bolt M8 X 1.25 X30 125 ± 2.5 Nm
Belt tensioner lower bolt M10 X 1.5 X55 182 ± 5 Nm
Water pump pulley bolt M6 X 1.0 X12 410 ± 1 Nm
Thermostat bolt M6 X 1.0 X22 310 ± 1 Nm
Coolant outlet port bolt M6 X 1.0 X22 310 ± 1 Nm
Coolant pipe mounting bolt M6 X 1.0 X14 310 ± 1 Nm
Bypass hose clamp M24 23 ± 0.5 Nm
EPS idler pulley - 125 ± 2.5 Nm
Engine mountinf stud bolt - 250 ± 5.0 Nm
Engine front mounting bolt M10 X 45 360 ± 6.0 Nm
Engine front mounting bolt M10 X 77 160 ± 6.0 Nm
Engine front hanger bracket M8 X 1.25 X 20 225 ± 2.5 Nm
Engine rear hanger bracket M8 X 1.25 X 20 425 ± 2.5 Nm
A/C compressor bolt - 425 ± 2.5 Nm
Alternator bolt M10 445 ± 4.5 Nm
Start motor bolt M10 4 Max. 48Nm
Page 354 of 1082

02-8
Fuel and engine oil system ▶
The engine oil and fuel damages the painted surfaces and rubber material of the vehicle.
Disconnect the negative cable from the battery before servicing the fuel system, and prepare the
service plug grip.
When working with the fuel or oil systems in enclosed area, always keep the working area well-
ventilated and never allow anybody to smoke.
Do not allow the gasoline to contact to rubber or leather parts.
Carefully separate the pipe between high pressure fuel pump and fuel injector so that any fuel can
be spilled out.
Fully release the pressure from the fuel system before removing any parts of fuel system.
To release the fuel pressure in high pressure line, let the engine fully cool down.
Gaskets and seals on the fuel and oil systems should be replaced with new ones. All bolts and nuts
should be tightened as specified.
Prolonged exposure to the engine oil make cause a skin cancer or an irritation.
Used engine cotains the hazardous material that may cause the skin cancer. Do not allow the used
engine to make contact with your skin.
Make sure to wear the protection gloves and goggle when handling the engine oil. If contact
happens, rinse affected areas immediately with plenty of water. Do not wash it with gasoline or
solvent. If irritation persists, consult a doctor.
Improperly disposed engine oil can pollute the environment. Dispose the used engine oil and oil
filter in accordance with local environmental regulations.
Make sure to check the connections for leak after installation. -
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Electric devices ▶
To prevent any damage to electric systems, make sure to disconnect the negative (-) cable from the
battery and place the ignition switch to OFF position before servicing.
Use only the specified parts with same ratings when replacing the electric devices. Check the
grounds and connections for looseness. -
- Extraordinary care should be taken when servicing the electric systems. Currently, the engine uses a lot
of electric devices. Short circuit and poor contact may cause the low engine performance, incomplete
combustion and other abnormalities.
Page 383 of 1082
02-371128-01
Front view
Rear view
Spring pin (cylinder head mounting)
Expansion plug (exhaust: 6)
Screw plug (water jacket plug) (30Nm)
Screw plug (oil gallery plug)
Spring pin (T.G.C.C) A.
B.
C.
D.
E.
Overview ▶
The cylinder block is made of special cast iron, and contains the major components such as cylinder
head, crankshaft and piston assembly. There are oil and coolant galleries to lubricate and cool the
engine.
Components ▶
Plug screw (water jacket plug) (70Nm)
Expansion plug (intake: 4)
Spring pin (A/C mounting)
Oil gallery (oil filter assembly)
Ctankshaft position sensor mounting
Plug screw (oil gallery plug)
Spring pin (RR seal mounting) A.
B.
C.
D.
E.
F.
G.
Page 384 of 1082
02-38
Engine oil
Coolant
Coolant and oil flows ▶
Cylinder head
Cylinder block water
jacket
Coolant pumpCoolant pipe
Thermostat
Supply line to cylinder head
Oil pumpSupply line to PCJ
Main bearing
Oil filter assembly
Page 420 of 1082
07-31535-01
1. SPECIFICATION
Description Specification
Oil pumpLubrication type Gear pump, forced circulation
Type Internal gear
Oil filter Type Full flow/Paper element
Engine oilOilMB 229.51 SEA 5W30 or API
SN/GF-5 SAE 5W20
Capacity 4.5 L
Oil injection nozzle Type Flange and bolt type
Regularly check the engine oil level and add the engine oil if necessary.
Remember to check the engine oil level and shorten the cycle to replace the engine oil under
severe driving conditions. -
- The engine oil filter element should be changed at the same time with the engine oil.
Frequent stop-and-go traffic, extended idling, short driving distance below 6 km, driving distance
below 16 km when the outside temperature remains below freezing
Driving in a hilly or mountainous terrain, sandy, or dusty area
High load driving such as trailer towing
Taxi, patrol service or delivery service (extended idling and excessive driving with low speed) -
-
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- Severe Driving Condition?
Page 423 of 1082
07-6
Oil Filter Assy
Oil Filter Cover
Oil Filter Element Kit
Drain Plug 1.
2.
9.
10.O-Ring
Oil Filter Bypass Valve Assy
Oil Filter Housing Gasket
Bolt
Oil pressure switch 11.
26.
30.
31.
35.
Page 424 of 1082
07-71535-01
Oil pressure switch
1. OVERVIEW
The lubrication system supplies oil to each lubrication section to prevent friction and wear and to remove
heat from the friction part. As the engine runs, frictional heat is generated on each lubrication section. If
this condition persists, the bearing can be burned and stuck.
In other words, it creates an oil film on each sliding surface to convert solid friction to liquid friction in
order to minimize wear and prevent temperature increasing on the friction part.
2. COMPONENTS
Engine oil dipstickOil jet
Engine oil panOil pumpOil filter module