Nissan Pathfinder (2010 year). Manual — part 372
EM-104
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ENGINE UNIT
5. Remove cylinder head. Refer to
EM-86, "Removal and Installation"
6. Remove sub harness, and remove knock sensors.
CAUTION:
Carefully handle sensor avoiding shocks.
7. Remove pilot converter using Tool as necessary.
8. Remove piston and connecting rod assembly as follows:
• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to
EM-112, "Inspection After Disassembly"
CAUTION:
Be careful not to drop connecting rod bearing, and to scratch the surface.
9. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
10. Remove connecting rod bearing cap.
11. Push piston and connecting rod assembly out to the cylinder
head side using suitable tool.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
12. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
Identify installation position, and store them without mixing them up.
13. Remove piston rings from piston.
• Before removing piston rings, check the piston ring side clearance. Refer to
.
• Remove piston rings using piston ring expander or suitable
tool.
CAUTION:
• When removing piston rings, be careful not to damage
piston.
• Be careful not to damage piston rings by expanding them
excessively.
14. Remove piston from connecting rod as follows:
Tool number
: ST16610001 (J-23907)
WBIA0583E
PBIC2940E
PBIC0087E
2010 Pathfinder
ENGINE UNIT
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a. Remove snap ring using snap ring pliers.
b. Heat piston to 60
°
to 70
°
C (140
°
to 158
°
F) with industrial use
drier or equivalent.
c. Push out piston pin with stick of outer diameter approximately 20
mm (0.79 in).
15. Remove lower cylinder block bolts.
• Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to
.
• Loosen lower cylinder block bolts in reverse order as shown in
several different steps.
NOTE:
Use TORX socket (size E14) for bolts No. 1 to 16 (M10 bolt).
16. Remove lower cylinder block.
• Cut liquid gasket for removal. Refer to
EM-6, "Precaution for Liquid Gasket"
.
CAUTION:
Be careful not to damage the mounting surfaces.
17. Remove crankshaft.
18. Pull rear oil seal out from rear end of crankshaft.
PBIC1638E
PBIC1639E
PBIC0262E
PBIC2941E
Tool number
: KV10111100 (J-37228)
2010 Pathfinder
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ENGINE UNIT
NOTE:
When replacing rear oil seal without removing lower cylinder block, use a suitable tool to pull the rear oil
seal installed between crankshaft and cylinder block out.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
19. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
CAUTION:
• Do not drop main bearing, or scratch the surface.
• Identify installation positions, and store them without mixing them up.
20. Remove oil jet.
ASSEMBLY
1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.
WARNING:
Use goggles to protect your eyes.
2. Install each plug to cylinder block as shown.
• Apply sealant to the thread of water drain plugs (A) and (B).
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants"
.
• Apply sealant to the thread of plug (C).
Use Genuine High Strength Thread Locking Sealant or
• Apply sealant to the threads of plug (D).
Use Anaerobic Liquid Gasket or equivalent. Refer to
14, "Recommended Chemical Products and Sealants"
.
NOTE:
For Canada, (D) is not plug but block heater. Refer to
• Replace washers with new one.
• Tighten each plug as specified below.
Block Plug and Block Heater Installation
3. Install oil jet.
WLIA0020E
Part
Washer
Tightening Torque
A
No
19.6 N·m (2.0 kg-m, 14 ft-lb)
B
Reuse
No
9.8 N·m (1.0 kg-m, 87 in-lb)
New
6.0 N·m (0.61 kg-m, 53 in-lb)
C
Yes
116 N·m (11.8 kg-m, 85 ft-lb)
D
Plug
Yes
62 N·m (6.3 kg-m, 46 ft-lb)
Block heater
73.5 N·m (7.5 kg-m, 54 ft-lb)
2010 Pathfinder
ENGINE UNIT
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• Insert oil jet dowel pin into cylinder block dowel pin hole, and
tighten bolts.
4. Install main bearings and thrust bearings as follows:
a. Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.
b. Install thrust bearings to the both sides of the No. 3 journal hous-
ing on cylinder block.
• Install thrust bearings with the oil groove facing crankshaft arm
(outside).
• Install thrust bearing with a projection on one end on cylinder
block, Align projection with mating notch.
c. Install main bearings paying attention to the direction.
• Main bearing with oil hole and groove goes on cylinder block.
The one without them goes on lower cylinder block.
• Before installing main bearings, apply engine oil to the bearing
surface (inside). Do not apply engine oil to the back surface,
but thoroughly clean it.
• When installing, align main bearing stopper protrusion to cut-
out of cylinder block and lower cylinder block.
• Ensure the oil holes on cylinder block and those on the corre-
sponding bearing are aligned.
5. Install crankshaft to cylinder block.
• While turning crankshaft by hand, check that it turns smoothly.
6. Inspect the outer diameter of lower cylinder block bolt. Refer to
EM-112, "Inspection After Disassembly"
7. Install lower cylinder block as follows:
NOTE:
Lower cylinder block cannot be replaced as a single part, because it is machined together with cylinder
block.
a. Apply a continuous bead of liquid gasket using Tool to lower cyl-
inder block as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants"
.
CAUTION:
After liquid gasket is applied, rear oil seal installation must
be finished within 5 minutes. Therefore, the following pro-
cedure must be performed quickly.
b. Tighten lower cylinder block as follows:
i.
Apply new engine oil to threads and seat surfaces of the bolts.
PBIC0898E
PBIC2968E
PBIC2969E
Tool number
: WS39930000 (
—
)
PBIC2942E
2010 Pathfinder
EM-108
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ENGINE UNIT
ii.
Tighten M8 bolts in numerical order as shown from No. 17 to 24.
CAUTION:
Wipe off completely any protruding liquid gasket on rear oil
seal installation surface.
NOTE:
There are more processes to complete the tightening bolts.
However stop procedure here to install rear oil seal.
c.
Install rear oil seal. Refer to
EM-84, "Removal and Installation of Rear Oil Seal"
.
d. Restart tightening of lower cylinder block bolts as follows:
i.
Tighten M10 bolts in numerical order as shown from No. 1 to 16.
NOTE:
Use TORX socket (size E14) for bolts No. 1 to 16 (M10 bolt).
ii.
Turn M10 bolts 90
°
clockwise in numerical order from No. 1 to
16 using Tool.
CAUTION:
Use angle wrench Tool to check tightening angle. Do not
make judgement by visual inspection.
• After installing the bolts, make sure that crankshaft can be rotated smoothly by hand.
• Wipe off completely any protruding liquid gasket on front side of the engine.
• Check the crankshaft end play. Refer to
EM-112, "Inspection After Disassembly"
.
8. Inspect the outer diameter of connecting rod bolt. Refer to
EM-112, "Inspection After Disassembly"
9. Install piston to connecting rod as follows:
a. Install new snap ring to the groove of piston rear side using suitable tool.
• Insert it fully into groove to install.
b. Install piston to connecting rod.
• Using industrial use drier or similar tool, heat piston until piston pin can be pushed in by hand without
excess force [approx. 60
°
to 70
°
C (140
°
to 158
°
F)]. From the front to the rear, insert piston pin into pis-
ton and connecting rod.
Bolts 17 - 24
: 22.1 N·m (2.3 kg-m, 16 ft-lb)
PBIC2941E
Bolts 1 - 16
: 35.3 N·m (3.6 kg-m, 26 ft-lb)
PBIC2941E
Tool number
: KV10112100 (BT-8653-A)
WBIA0584E
2010 Pathfinder
ENGINE UNIT
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• Assemble so that the front mark on the piston head and the
cylinder number on connecting rod are positioned as shown.
c. Install new snap ring to the groove of the piston front side.
• Insert it fully into groove to install.
• After installing, make sure that connecting rod moves
smoothly.
10. Install piston rings using piston ring expander or suitable tool.
CAUTION:
• When installing piston rings, be careful not to damage
piston.
• Be careful not to damage piston rings by expending them
excessively.
• If there is stamped mark on ring, mount it with marked side up.
NOTE:
If there is no stamp on ring, no specific orientation is required
for installation.
• Position each ring with the gap as shown referring to the pis-
ton front mark.
• Check the piston ring side clearance. Refer to
EM-112, "Inspection After Disassembly"
11. Install connecting rod bearings to connecting rod and connecting rod bearing cap.
• Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not apply
engine oil to the back surface, but thoroughly clean it.
SEM838F
PBIC0087E
Stamped mark:
Top ring
: —
Second ring
: R
SEM757G
PBIC0808E
2010 Pathfinder
EM-110
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[VQ40DE]
ENGINE UNIT
• When installing, align connecting rod bearing stopper protru-
sion with cutout of connecting rods and connecting rod bearing
caps to install.
• Ensure the oil hole on connecting rod and that on the corre-
sponding bearing are aligned.
12. Install piston and connecting rod assembly to crankshaft.
13. Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
14. Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
15. Match the cylinder position with the cylinder number on connecting rod to install.
NOTE:
Be sure that front mark on piston head is facing front of engine.
16. Install piston with the front mark on the piston head facing the
front of engine using Tool.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
17. Install connecting rod bearing cap.
• Match the stamped cylinder number marks on connecting rod
with those on connecting rod bearing cap to install.
• Be sure that front mark on connecting rod bearing cap is fac-
ing front of engine.
18. Tighten connecting rod bolts as follows:
a. Apply engine oil to the threads and seats of connecting rod bolts.
b. Tighten connecting rod bolts.
PBIC2067E
Tool number
: EM03470000 (J-8037)
WBIA0585E
PBIC0809E
Connecting rod bolt : 19.6 N·m (2.0 kg-m, 14 ft-lb)
2010 Pathfinder
ENGINE UNIT
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c. Then tighten all connecting rod bolts 90
°
clockwise.
CAUTION:
Always use Tool. Avoid tightening based on visual check
alone.
• After tightening connecting rod bolts, make sure that crank-
shaft rotates smoothly.
• Check the connecting rod side clearance. Refer to
"Inspection After Disassembly"
.
19. Install pilot converter.
• With drift of the following outer diameter, press-fit as far as it
will go.
• Press-fit pilot converter with its chamfer facing crankshaft as
shown.
20. Install knock sensors.
• Install knock sensor so that connector faces rear of engine.
• After installing knock sensor, connect harness connector, and
lay it out to rear of engine.
CAUTION:
• Do not tighten bolts while holding connector.
• If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:
• Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.
• Make sure that knock sensor does not interfere with other
parts.
Tool number
: KV10112100 (BT-8653-A)
WBIA0586E
Pilot converter
: Approx. 33 mm (1.30 in)
PBIC2947E
SEM537E
PBIC2948E
2010 Pathfinder
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