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Nissan Pathfinder (2006 year). Manual - part 245

CYLINDER BLOCK

EM-107

2006 Pathfinder

CYLINDER BLOCK

PFP:11010

Disassembly and Assembly

EBS00QCA

Reinforcement plate

Drive plate (A/T models)

Rear oil seal

Sub harness

Knock sensor

Water connector

Cylinder block

Oil jet

Thrust bearing

10. Pilot converter (A/T models)

11. Main bearing

12. Crankshaft

13. Crankshaft key

14. Lower cylinder block

15. Lower cylinder block bolt

16. Connecting rod bolt

17. Connecting rod bearing cap

18. Connecting rod bearing

19. Connecting rod

20. Snap ring

21. Piston pin

22. Piston

23. Oil ring

24. Second ring

25. Top ring

WBIA0582E

EM-108

CYLINDER BLOCK

2006 Pathfinder

DISASSEMBLY

Remove engine assembly from vehicle. Refer to

EM-105, "REMOVAL"

Remove both exhaust manifolds. Refer to

EM-22, "Removal and Installation"

Lift engine, and mount it onto engine stand.

Cylinder block

Gasket

Cylinder block heater

Connector protector cap

PBIC2936E

PBIC0805E

CYLINDER BLOCK

EM-109

2006 Pathfinder

●

A widely use engine stand can be used.

CAUTION:

Use engine stand that has a load capacity [approximately
220 kg (441 lb) or more] large enough for supporting the
engine weight.

Drain engine oil. Refer to

LU-9, "Changing Engine Oil"

Drain engine coolant by removing water drain plugs from cylin-
der block left side at “A” and cylinder block front side at “B” as
shown in the figure.

NOTE:
For Canada, “D” in the figure is not plug but block heater.

Remove drive plate (A/T models); using Tool.

●

Loosen bolts in diagonal order.

●

Use TORX socket for drive plate bolts.

CAUTION:

●

Do not disassemble drive plate (A/T models).

●

Do not place drive plate (A/T models) with signal plate
facing down.

●

When handling signal plate, take care not to damage or
scratch it.

●

Handle signal plate in a manner that prevents it from
becoming magnetized.

Remove cylinder head. Refer to

EM-93, "REMOVAL"

Remove sub harness, and remove knock sensors.

PBIC0085E

WLIA0020E

Tool number

: KV10117700 (J-44716)

PBIC2938E

EM-110

CYLINDER BLOCK

2006 Pathfinder

CAUTION:

Carefully handle sensor avoiding shocks.

Remove pilot converter (A/T models) using Tool as necessary.

10. Remove piston and connecting rod assembly as follows:

●

Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer
to

EM-123, "CONNECTING ROD SIDE CLEARANCE"

CAUTION:

Be careful not to drop connecting rod bearing, and to scratch the surface.

11. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.

12. Remove connecting rod bearing cap.

13. 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.

14. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.

CAUTION:

Identify installation position, and store them without mixing them up.

15. Remove piston rings form piston.

●

Before removing piston rings, check the piston ring side clearance. Refer to

EM-124, "PISTON RING

SIDE CLEARANCE"

●

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.

16. Remove piston from connecting rod as follows:

Tool number

: ST16610001 (J-23907)

WBIA0583E

PBIC2940E

PBIC0087E

CYLINDER BLOCK

EM-111

2006 Pathfinder

Remove snap ring using snap ring pliers.

Heat piston to 60

to 70

C (140

to 158

F) with industrial use

drier or equivalent.

Push out piston pin with stick of outer diameter approximately 20
mm (0.79 in).

17. Remove lower cylinder block bolts.

●

Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to

EM-123,

"CRANKSHAFT END PLAY"

●

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).

18. Remove lower cylinder block.

●

Cut liquid gasket for removal. Refer to

EM-5, "REMOVAL OF LIQUID GASKET SEALING"

CAUTION:

Be careful not to damage the mounting surfaces.

19. Remove crankshaft.

PBIC1638E

PBIC1639E

PBIC0262E

PBIC2941E

Tool number

: KV10111100 (J-37228)

EM-112

CYLINDER BLOCK

2006 Pathfinder

20. Pull rear oil seal out from rear end of crankshaft.

NOTE:
When replacing rear oil seal without removing lower cylinder block, use a suitable to pull the rear oil seal
installed between crankshaft and cylinder block out.

CAUTION:

Be careful not to damage crankshaft and cylinder block.

21. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.

CAUTION:

●

Be careful not to drop main bearing, and to scratch the surface.

●

Identify installation positions, and store them without mixing them up.

22. Remove oil jet.

ASSEMBLY

Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.

CAUTION:

Use a goggles to protect your eye.

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

●

Apply sealant to the thread of plugs “C”.
Use Genuine High Strength Thread Locking Sealant or
equivalent. Refer to

GI-47, "Recommended Chemical

Products and Sealants"

●

Apply sealant to the thread of plug “D”.
Use Anaerobic Liquid Gasket or equivalent. Refer to

GI-

NOTE:
For Canada, “D” in the figure is not plug but block heater.
Refer to

EM-107, "Disassembly and Assembly"

●

Replace washers with new one.

●

Tighten each plug as specified below.

Block Plug and Block Heater Installation

Install oil jet.

WLIA0020E

Part

Washer

Tightening Torque

19.6 N·m (2.0 kg-m, 14 ft-lb)

Reuse

9.8 N·m (1.0 kg-m, 87 in-lb)

New

6.0 N·m (0.61 kg-m, 53 in-lb)

Yes

116 N·m (11.8 kg-m, 85 ft-lb)

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)

CYLINDER BLOCK

EM-113

2006 Pathfinder

●

Insert oil jet dowel pin into cylinder block dowel pin hole, and
tighten bolts.

Install main bearings and thrust bearings as follows:

Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.

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.

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 bear-
ing surface (inside). Do not apply engine oil to the back sur-
face, 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.

Install crankshaft to cylinder block.

●

While turning crankshaft by hand, check that it turns smoothly.

Inspect the outer diameter of lower cylinder block bolt. Refer to

EM-131, "LOWER CYLINDER BLOCK

BOLT OUTER DIAMETER"

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.

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

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.

Tighten lower cylinder block as follows:

PBIC0898E

PBIC2968E

PBIC2969E

Tool number

: WS39930000 (

—

)

PBIC2942E

EM-114

CYLINDER BLOCK

2006 Pathfinder

Apply new engine oil to threads and seat surfaces of the bolts.

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.

Install rear oil seal. Refer to

EM-91, "INSTALLATION"

Restart tightening of lower cylinder block bolts as follows:

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-123, "CRANKSHAFT END PLAY"

Inspect the outer diameter of connecting rod bolt. Refer to

EM-132, "CONNECTING ROD BOLT OUTER

DIAMETER"

Install piston to connecting rod as follows:

Install new snap ring to the groove of piston rear side using suitable tool.

●

Insert it fully into groove to install.

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

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