Nissan Pathfinder (2008 year). Manual — part 382
ENGINE ASSEMBLY
EM-219
< REMOVAL AND INSTALLATION >
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4.
Partially drain the A/T fluid. Refer to
TM-182, "Changing the A/T Fluid (ATF)"
5.
Drain the transfer fluid (4WD models). Refer to
or
.
6.
Remove the engine hood. Refer to
DLK-182, "Removal and Installation of Hood Assembly"
7.
Release the fuel pressure. Refer to
.
8.
Remove the engine room cover using power tool. Refer to
EM-164, "Removal and Installation"
.
9.
Remove the air duct and air cleaner case assembly. Refer to
EM-165, "Removal and Installation"
.
10. Disconnect the vacuum hose between the vehicle and engine and set it aside.
11. Remove the radiator assembly and hoses. Refer to
CO-43, "Removal and Installation"
.
12. Remove the drive belts. Refer to
EM-153, "Removal and Installation"
13. Remove the fan blade. Refer to
CO-46, "Removal and Installation (Crankshaft Driven Type)"
14. Disconnect the engine room harness from the fuse box and set it aside.
15. Disconnect the ECM.
16. Disconnect the engine room harness from the engine side and set it aside.
17. Disconnect the engine harness grounds.
18. Disconnect the power steering reservoir tank from the engine and move it aside.
19. Disconnect the power steering oil pump from the engine. Move it aside and secure it using suitable wire or
ST-24, "Removal and Installation"
20. Remove the A/C compressor bolts and set the compressor aside. Refer to
.
21. Disconnect the brake booster vacuum line.
22. Disconnect the EVAP line.
23. Disconnect the fuel hose at the engine side connection. Refer to
EM-180, "Removal and Installation"
24. Disconnect the heater hoses at the cowl, and install plugs to avoid leakage of engine coolant.
25. Remove the A/T oil level indicator and indicator tube upper bolts.
26. Remove the front final drive assembly (4WD models). Refer to
DLN-376, "Removal and Installation"
27. Remove the exhaust manifolds. Refer to
EM-170, "Removal and Installation"
28. Remove the A/T. Refer to
TM-225, "2WD : Removal and Installation"
(2WD models) or
(4WD models).
29. Install the engine slingers into the left bank cylinder head (A)
and right bank cylinder head (B).
30. Lift using a hoist and secure the engine in position.
31. Remove engine mounting insulator bolts.
32. Remove the engine assembly from the vehicle, avoid interfer-
ence with the vehicle body.
CAUTION:
• Before and during lifting, always check if any harnesses
are left connected.
33. Remove the parts that may restrict installation of the engine to the engine stand.
NOTE:
This procedure is described assuming that you use an engine stand mounting to the surface to which the
transmission mounts.
a.
Remove the drive plate.
• Holding the crankshaft pulley bolt, lock the crankshaft to remove the drive plate bolts.
• Loosen the bolts diagonally.
CAUTION:
Engine slinger torque:
45.0 N·m (4.6 kg-m, 33 ft-lb)
AWBIA0088ZZ
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ENGINE ASSEMBLY
• Be careful not to damage the drive plate. Especially
avoid deforming and damaging of the signal plate teeth
(circumference position).
• Place the drive plate with the signal plate surface facing
other than downward.
• Keep magnetic materials away from the signal plate.
CAUTION:
Use an engine stand that has a load capacity [approximately 240kg (529 lb) or more] large enough
for supporting the engine weight.
• If the load capacity of the stand is not adequate, remove the following parts beforehand to
reduce the potential risk of overturning the stand.
- Remove the fuel tube and fuel injector assembly. Refer to
EM-180, "Removal and Installation"
.
- Remove the intake manifold. Refer to
EM-166, "Removal and Installation"
.
- Remove the ignition coil. Refer to
EM-177, "Removal and Installation"
- Remove the rocker cover. Refer to
EM-178, "Removal and Installation"
.
- Other removable brackets.
CAUTION:
Before removing the hanging chains, make sure the engine stand is stable and there is no risk of
overturning.
34. Remove the generator. Refer to
CHG-21, "Removal and Installation"
.
35. Remove the engine mounting insulator and bracket using power tool.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed correctly
during re-assembly.
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of driv-
etrain components.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to
MA-10, "Fluids and Lubricants"
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:
KBIA2491E
Item
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gas
—
Leakage
—
ENGINE ASSEMBLY
EM-221
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*Transmission fluid, power steering fluid, brake fluid, etc.
EM-222
< DISASSEMBLY AND ASSEMBLY >
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ENGINE UNIT
DISASSEMBLY AND ASSEMBLY
ENGINE UNIT
Disassembly and Assembly
INFOID:0000000001282038
1.
Knock sensor sub-harness
2.
Knock sensor
3.
Cylinder block
4.
Main bearing upper
5.
Top ring
6.
Second ring
7.
Oil ring
8.
Crankshaft key
9.
Piston
10.
Connecting rod
11.
Snap ring
12.
Piston pin
13.
Connecting rod bearing
14.
Connecting rod bearing cap
15.
Main bearing cap
WBIA0471E
ENGINE UNIT
EM-223
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DISASSEMBLY
NOTE:
Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-
ent type of engine stand, some steps may be different.
1.
Remove engine assembly from vehicle and mount to engine stand. Refer to
.
CAUTION:
Before removing the hanging chains, make sure engine stand is stable and there is no risk of over-
turning.
2.
Drain engine oil. Refer to
3.
Drain engine coolant by removing the cylinder block drain plugs
(A)”, (“B)”, (“C) and (“D) as shown.
4.
Remove the following components and associated parts (the parts referred to in step 1 are not included
here).
• Oil pan (upper and lower) and oil strainer. Refer to
EM-173, "Removal and Installation"
• Crankshaft pulley, front cover and timing chain. Refer to
EM-185, "Removal and Installation"
• Camshaft. Refer to
EM-193, "Removal and Installation"
.
EM-208, "Removal and Installation"
.
5.
Remove knock sensor and sub harness.
CAUTION:
Carefully handle sensor, avoiding shocks.
6.
Check connecting rod side clearance. Refer to
EM-230, "Inspection After Disassembly"
.
7.
Remove piston and connecting rod assembly as follows.
a.
Position the crankshaft pin corresponding to the connecting rod to be removed onto bottom dead center.
b.
Remove connecting rod cap.
16.
Thrust bearing lower
17.
Main bearing lower
18.
Crankshaft
19.
Pilot converter
20.
Thrust bearing upper
21.
Side bolt
22.
Drive plate
23.
Reinforcement plate
24.
Rear oil seal retainer
25.
Rear oil seal
26.
Transmission
27.
O-ring
28.
Crankshaft position sensor (POS)
29.
Gasket
30.
Cylinder block heater
31.
Connector cap
WBIA0419E
KBIA2549E
EM-224
< DISASSEMBLY AND ASSEMBLY >
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ENGINE UNIT
c.
Push the piston and connecting rod assembly out to the cylinder
head side using suitable tool.
8.
Remove connecting rod bearings.
CAUTION:
When removing them, note the installation position. Keep them in the correct order.
9.
Check piston ring side clearance. Refer to
EM-230, "Inspection After Disassembly"
10. Remove piston rings from piston using suitable tool.
CAUTION:
• Do not damage piston.
• Do not damage piston rings by expanding them exces-
sively.
11. Remove piston from connecting rod as follows.
a.
Remove snap ring using suitable tool.
b.
Heat piston to 60
°
to 70
°
C (140
°
to 158
°
F) using suitable tool.
PBIC0086E
PBIC0087E
PBIC0260E
PBIC0261E
ENGINE UNIT
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c.
Push out piston pin using suitable tool.
12. Separate and remove rear oil seal retainer from cylinder block.
CAUTION:
Do not damage mating surface.
13. Remove rear oil seal from rear oil seal retainer.
14. Measure the crankshaft side clearance. Refer to
EM-230, "Inspection After Disassembly"
.
15. Remove main bearing caps as follows:
• Loosen bolts in reverse order as shown in several different
steps.
a.
Loosen side bolts (M10) starting from 30 to 21 to remove.
b.
Loosen main bearing cap sub bolts (M9) starting from 20 to 11 to
remove.
c.
Loosen main bearing cap bolts (M12) starting from 10 to 1 to
remove.
d.
Remove main bearing cap.
• Insert 2 bolts into bolt holes, and then remove main bearing
cap by lifting up and shaking forward and backward.
16. Remove crankshaft.
17. Remove the main bearings and thrust bearings from the cylinder block and main bearing caps.
• When removing them, note the installation position. Keep them in the correct order.
18. Remove pilot converter using Tool if necessary.
PBIC0262E
PBIC0090E
KBIA2492E
Tool number
: ST16610001 (J-23907)
WBIA0596E
EM-226
< DISASSEMBLY AND ASSEMBLY >
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ENGINE UNIT
ASSEMBLY
1.
Fully air-blow the coolant and oil passages in the cylinder block, cylinder bore, and crankcase to remove
any foreign material.
CAUTION:
Use goggles to protect your eyes.
2.
Install each plug to the cylinder block (only screw-type plugs are
shown).
• Apply liquid gasket.
Use Genuine Thread Sealant or equivalent. Refer to
"Recommended Chemical Products and Sealants"
.
• Replace copper washers with new ones.
• Tighten each plug as specified below.
3.
Install main bearings and thrust bearings.
a.
Remove any dust, dirt, and oil on the bearing mating surfaces of
the cylinder block and main bearing caps.
b.
Install thrust bearings to both sides of the No. 3 journal housing
on the cylinder block and main bearing caps
• Install thrust bearings with the oil groove facing the crankshaft
arm (outside).
• Install thrust bearings with a protrusion in the center on the
main bearing caps.
c.
Install main bearings paying attention to the direction.
• Install the one with oil holes onto the cylinder block and the
one without oil holes onto the main bearing cap.
• Before installing bearings, apply engine oil to bearing surface
(inside). Do not apply oil to the back surface, but thoroughly
clean it.
• When installing, align the bearing stopper to the notch.
• Ensure the oil holes on the cylinder block and those on the
corresponding bearing are aligned.
4.
Install pilot converter to the crankshaft using suitable tool.
5.
Install crankshaft to the cylinder block.
• While turning crankshaft by hand, make sure it turns smoothly.
Part
Washer
Tightening torque
A
Yes
53.9 N·m (5.5 kg-m, 40 ft-lb)
B
No
19.6 N·m (2.0 kg-m, 15 ft-lb)
C
Yes
62.7 N·m (6.4 kg-m, 46 ft-lb)
D
Yes
62.7 N·m (6.4 kg-m, 46 ft-lb)
WBIA0419E
PBIC0093E
PBIC0094E
EMP0569D
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