Infiniti QX56 (Z62). Manual - part 667

 

  Index      Infiniti     Infiniti QX56 (Z62) - service repair manual 2011 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  665  666  667  668   ..

 

 

Infiniti QX56 (Z62). Manual - part 667

 

 

EM-108

< UNIT DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

• Use a piston ring expander (commercial service tool) (A).

CAUTION:

• When removing piston rings, be careful not to damage

piston.

• Be careful not to damage piston rings by expanding them

excessively.

7.

Remove piston from connecting rod as per the following: 

a.

Using snap ring pliers (A), remove snap rings.

b.

Heat piston to 60 to 70

°

C (140 to 158

°

F) with an industrial use

dryer (A) or an equivalent.

c.

Push out piston pin using a stick that has an outer diameter of
approximately 20 mm (0.79 in).

8.

Remove rear oil seal and rear oil seal retainer assembly from cylinder block.
• Insert screwdriver or similar tool between rear end of crankshaft counter weight and rear oil seal

retainer, and separate liquid gasket to remove.

CAUTION:

Be careful not to damage the mating surfaces.

9.

Using screwdriver or similar tool, and lever off rear oil seal from rear oil seal retainer.

10. Remove main bearing cap as per the following:

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

EM-115, "Inspection"

.

JPBIA0194ZZ

JPBIA0195ZZ

JPBIA0196ZZ

PBIC0262E

CYLINDER BLOCK

EM-109

< UNIT DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

a.

Loosen side bolts starting from No. 30 to 21 to remove.

b.

Loosen main bearing cap sub bolts starting from No. 20 to 11 to
remove.

c.

Loosen main bearing cap bolts starting from No. 10 to 1 to
remove.

d.

Remove the main bearing cap.
• Insert bolts (1) into bolt holes, and then remove main bearing

cap (2) by lifting up and shaking forward and backward.

CAUTION:

Be careful not to damage the mounting surface.

11. Remove crankshaft.

12. Remove main bearings and thrust bearings from main bearing cap and 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.

13. Remove pilot converter using the pilot bushing puller (commercial service tool), if necessary.

14. 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.

CAUTION:

Use goggles to protect your eyes.

: Engine front

JPBIA2146ZZ

JPBIA2478ZZ

EM-110

< UNIT DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

2.

Install each plug to cylinder block as shown in the figure.

• Tighten each plug as specified below.

• Replace washers (1), (5) with new ones.
• Apply sealant to the thread of water drain plug (3).

Use Genuine RTV silicone sealant or equivalent. Refer to

GI-22, "Recommended Chemical Products and Sealants"

.

• Apply sealant to the thread of plug (4).

Use high strength thread locking sealant or equivalent.
Refer to 

GI-22, "Recommended Chemical Products and

Sealants"

. 

3.

Install pilot converter to crankshaft, if removed.
• With drift [outer diameter: approx. 35 mm (1.38 in)], press-fit

as far as it will go.

• Press-fit pilot converter with its chamfering side facing crank-

shaft as shown in the figure.

4.

Install main bearings and thrust bearings as per the following:

CAUTION:

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

a.

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

: Engine front

Refer to 

GI-4, "Components"

 for symbols in the figure.

Part

Tightening torque

Plug (2)

78.0 N·m (8.0 kg-m, 58 ft-lb)

Water drain plug (3)

19.6 N·m (2.0 kg-m, 14 ft-lb)

Plug (4)

53.9 N·m (5.5 kg-m, 40 ft-lb)

JPBIA3501ZZ

EMP0569D

: Crankshaft side

JPBIA0210ZZ

CYLINDER BLOCK

EM-111

< UNIT DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

b.

Install thrust bearings (2) to both sides of the No. 3 journal hous-
ing on cylinder block (1).

• Install thrust bearings with the oil groove (A) facing crankshaft

arm (outside). 

c.

Install main bearings paying attention to the direction.
• Main bearing with oil hole (B) and groove (C) goes on cylinder

block. The one without them goes on main bearing cap.

• 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 main bearing.

• 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.

Install main bearing caps as per the following:
• Align the identification number to the journal position to install.

• Install it with the front mark (indicated by stamping) facing the

front of engine.

• Using plastic hammer or similar tool, tap them lightly to seat

them on the installation position.
NOTE:
Main bearing cap cannot be replaced as a single parts,
because it is machined together with cylinder block.

7.

Install each main bearing cap bolts as per the following:

CAUTION:

If main bearing cap bolts and sub bolts are re-used, check their outer diameters before installa-
tion. Refer to 

EM-115, "Inspection"

.

a.

Apply new engine oil to threads and seat surfaces of main bearing cap bolts and sub bolts.

b.

Tighten all bolts in order of (No. 1 - 30) temporarily.

c.

Tighten main bearing cap bolts (M12) in order of No. 1 - 10.

d.

Tighten main bearing cap sub bolts (M9) in order of No. 11 - 20.

3

: Main bearing (upper) (cylinder block side)

4

: Crankshaft

5

: Main bearing (lower) (main bearing cap side)

: Engine front

JPBIA2148ZZ

: Engine front

JPBIA2380ZZ

: Engine front

: 39.2 N·m (4.0 kg-m, 29 ft-lb)

: 29.4 N·m (3.0 kg-m, 22 ft-lb)

JPBIA2146ZZ

 

 

 

 

 

 

 

Content   ..  665  666  667  668   ..