2006 INFINITI QX56 lock

TIMING CHAINEM-45
C
DE
F
G H
I
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K L
M A
EM
Revision: November 2009 2006 QX56
a. Apply engine oil onto the threaded parts of the bolt and seating area.
b. Select the one most visible notch of the four on the bolt flange.
Corresponding to the selected notch, put a alignment mark
(such as paint) on the crankshaft pulley.
14. Rotate the crankshaft pulley in normal direction (clockwise when viewed from engine front) to check for parts interference.
15. Installation of the remaining components is in the reverse of order of removal.Crankshaft pulley bolt torque
Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90
° (angle tightening)
KBIA2519E

EM-46Revision: November 2009
CAMSHAFT
2006 QX56
CAMSHAFTPFP:13001
Removal and InstallationEBS00RF8
* Refer to GI-46, "Recommended Chemical Products and Sealants" .
REMOVAL
1. Remove the RH bank and LH bank rocker covers. Refer to EM-35, "Removal and Installation" .
2. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica- tion notch (without paint mark) with the timing indicator on the
front cover.
1. Cylinder head (RH bank) 2. Camshaft bracket (No. 2, 3, 4, 5) 3. Valve lifter
4. Camshaft bracket (No. 1) 5. Seal washer6. Camshaft (RH bank EXH)
7. Camshaft (RH bank INT) 8. Camshaft (LH bank INT)9. Camshaft (LH bank EXH)
10. Camshaft sprocket (RH bank EXH) 11. Camshaft sprocket (RH bank INT) 12. Camshaft sprocket (LH bank INT)
13. Camshaft sprocket (LH bank EXH) 14. Camshaft position sensor (PHASE) 15. O-ring
16. Cylinder head (LH bank)
WBIA0469E
KBIA2476E

EM-50Revision: November 2009
CAMSHAFT
2006 QX56
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V block on precise flat work bench, and support No. 1 andNo. 5 journals of the camshaft.
2. Set dial indicator vertically to No. 3 journal.
3. Turn the camshaft to one direction, and measure the camshaft runout on dial indicator (total indicator reading).

If measurement exceeds specification, replace the camshaft.
Camshaft Cam Height

Measure the camshaft cam height.

If measurement is not within the specifications, replace the cam-
shaft.
Camshaft Journal Clearance
Camshaft Journal Diameter

Measure the diameter of the camshaft journal.
Camshaft Bracket Inner Diameter

Tighten the camshaft bracket bolt to the specified torque.

Measure the inner diameter of the camshaft bracket.
Calculation of Camshaft Journal Clearance
(Journal clearance) = (camshaft bracket inner diameter) – (camshaft
journal diameter)

If measurement is not within specification, replace either or both
camshaft and cylinder head.
NOTE:
The inner diameter of the camshaft bracket is manufactured together with the cylinder head. Replace the
whole cylinder head as an assembly. Camshaft runout : Less than 0.02 mm (0.0008 in)
EMK0641D
Standard cam height
(intake & exhaust)
: 44.465 - 44.655 mm
(1.7506 - 1.7581 in)
Cam wear limit
(intake & exhaust) : 0.02 mm (0.0008 in)
PBIC0039E
Standard diameter : 25.953 - 25.970 mm
(1.0218 - 1.0224 in)
PBIC0040E
Standard : 26.000 - 26.021 mm (1.0236 - 1.0244 in)
Standard : 0.030 - 0.068 mm (0.0012 - 0.0027 in)
PBIC1645E

CAMSHAFTEM-55
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EM
Revision: November 2009 2006 QX56
5. Install the camshaft sprockets using the following procedure:

A: LH bank shown
a. Install the camshaft sprockets aligning them with the matching marks painted (B) on the timing chain (C) when removed. Align
the camshaft sprocket key groove with the dowel pin on the
camshaft front edge at the same time. Then temporarily tighten
camshaft sprocket bolts.

Install the intake and exhaust side camshaft sprockets by
selectively using the groove of the dowel pin according to the
bank. (Common part used for both banks.)

A: Intake (I)

B: Exhaust (E)

R: for RH bank

L: for LH bank
b. Lock the hexagonal part of the camshaft in the same way as for removal, and tighten the camshaft sprocket bolts.
c. Check again that the timing alignment mark on the timing chain and on each sprocket are aligned.
6. Install the chain tensioner using the following procedure: NOTE:
LH is shown.
a. Install the chain tensioner.

Compress the plunger and hold it using a stopper pin when
installing.

Loosen the slack guide side timing chain by rotating the cam-
shaft hexagonal part if mounting space is small.
b. Remove the stopper pin and release the plunger, and then apply tension to the timing chain.
c. Install the RH bank timing chain tensioner cover onto the front cover.

Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants"
.
7. Check and adjust valve clearances. Refer to EM-55, "
Va l v e
Clearance" .
8. Installation of the remaining components is in the reverse order of removal.
Va l v e C l e a r a n c eEBS00RF9
INSPECTION
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or
noise).
WBIA0712E
WBIA0700E
Chain tensioner bolts : 6.9 N·m (0.70 kg-m, 61 in-lb)
Tensioner cover bolts : 9.0 N·m (0.92 kg-m, 80 in-lb)KBIA2479E
KBIA2547E

EM-56Revision: November 2009
CAMSHAFT
2006 QX56
1. Warm up the engine. Then stop the engine.
2. Remove the engine cover and. Refer to EM-12, "
Removal and Installation" .
3. Remove the battery cover. Refer to SC-9, "
Removal and Installation" .
4. Remove the air cleaner and air duct assembly EM-15, "
Removal and Installation" .
5. Remove the RH bank and LH bank rocker covers using power tool. Refer to EM-35, "
REMOVAL" .
6. Turn the crankshaft pulley in the normal direction (clockwise when viewed from engine front) to align TDC identification notch
(without paint mark) with timing indicator.
7. At this time, make sure both the intake and exhaust cam noses of No. 1 cylinder (top front on LH bank) face outside.

If they do not face outside, turn crankshaft pulley once more.
8. Measure valve clearances at the locations marked “×” as shown
in the table below (locations indicated with black arrow).

⇐ : Engine front

⇐ (black): Measurable at No.1 cylinder compression top dead
center

⇐ (white): Measurable at No. 3 cylinder compression top
dead center

A: RH

B: LH

C: Exhaust

D: Intake
NOTE:
Firing order 1-8-7-3-6-5-4-2

No. 1 cylinder compression TDC
KBIA2476E
KBIA0400J
Measuring position (RH bank) No. 2 cyl
(E) No. 4 cyl
(F) No. 6 cyl
(G) No. 8 cyl
(H)
No. 1 cylinder at TDC EXH
×
INT ××
Measuring position (LH bank) No. 1 cyl
(J) No. 3 cyl
(K) No. 5 cyl
(L) No. 7 cyl
(M)
No. 1 cylinder at TDC INT
××
EXH ××
WBIA0713E

CAMSHAFTEM-57
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EM
Revision: November 2009 2006 QX56

Measure valve clearance using suitable tool.Refer to EM-105,
"Valve Clearance" .
CAUTION:
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.
9. Turn the crankshaft pulley clockwise 270 ° from the position of No. 1 cylinder compression TDC to obtain
No. 3 cylinder compression TDC.
10. Measure valve clearances at the locations marked “×” as shown
in the table below (locations indicated with white arrow).

⇐ : Engine front

⇐ (black): Measurable at No.1 cylinder compression top dead
center

⇐ (white): Measurable at No. 3 cylinder compression top
dead center

A: RH

B: LH

C: Exhaust

D: Intake
NOTE:
Firing order 1-8-7-2-3-6-5-4-2

No. 3 cylinder compression TDC

Measure valve clearance using suitable tool.Refer to EM-105,
"Valve Clearance" .
CAUTION:
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.
KBIA0185E
Measuring position (RH bank) No. 2 cyl
(E) No. 4 cyl
(F) No. 6 cyl
(G) No. 8 cyl
(H)
No. 3 cylinder at TDC EXH
×
INT ×
Measuring position (LH bank) No. 1 cyl
(J) No. 3 cyl
(K) No. 5 cyl
(L) No. 7 cyl
(M)
No. 3 cylinder at TDC INT
××
EXH ××
WBIA0713E
KBIA0185E

EM-58Revision: November 2009
CAMSHAFT
2006 QX56
11. Turn the crankshaft pulley clockwise 90° from the position of No.
3 cylinder compression TDC (clockwise by 360 ° from the posi-
tion of No. 1 cylinder compression TDC) to measure the intake
and exhaust valve clearances of No. 6 cylinder and the exhaust
valve clearance of No. 2 cylinder.
12. If out of specifications, adjust as necessary. Refer to EM-58, "
ADJUSTMENT" .
ADJUSTMENT
NOTE:

Perform adjustment depending on the selected head thickness of the valve lifter.

The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differ-
ences caused by temperature. Use the specifications for hot engine condition to adjust.
1. Remove the camshaft. Refer to EM-46, "
REMOVAL" .
2. Remove the valve lifters at the locations that are out of specification.
3. Measure the center thickness of the removed valve lifters using suitable tool.
4. Use the equation below to calculate the valve lifter thickness for replacement.

Valve lifter thickness calculation:
Thickness of replacement valve lifter = t1+ (C1 - C2)
t1 = Thickness of removed valve lifter
C1 = Measured valve clearance
C2= Standard valve clearance:

Thickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark N788 indicates 7.88 mm (0.3102 in) in thickness.

Available thickness of valve lifter: 25 sizes with range 7.88 to
8.36 mm (0.3102 to 0.3291 in) in steps of 0.02 mm (0.0008 in)
(when manufactured at factory). Refer to EM-106, "
Available
Valve Lifter" .
WBIA0713E
KBIA0057E
KBIA0119E

EM-62Revision: November 2009
OIL SEAL
2006 QX56
2. Lock the drive plate using Tool A. CAUTION:
Do not damage the drive plate. Especially, avoid deforming
and damaging the signal plate teeth (circumference posi-
tion).
Keep magnetic materials away from signal plate.
NOTE:
Remove the bolts diagonally.
3. Remove the drive plate. CAUTION:
Place the drive plate with the signal plate surface facing upward.
4. Remove the engine rear plate.
5. Remove the rear oil seal using suitable tool. CAUTION:
Do not damage crankshaft or oil seal retainer surface.
INSTALLATION
1. Apply new engine oil to both the oil seal lip and dust seal lip of the new rear oil seal.
2. Install the rear oil seal.

Install the rear oil seal so that each seal lip is oriented as
shown.

Press-fit the rear oil seal using suitable tool.
CAUTION:

Do not damage the crankshaft or cylinder block.

Press-fit the oil seal straight to avoid causing burrs or
tilting.

Do not touch grease applied onto the oil seal lip.

Do not damage or scratch the outer circumference of
the rear oil seal.

Tap until flattened with the front edge of the oil seal retainer.
3. Installation of the remaining components is in the reverse order of removal. Refer to EM-78, "
Disassembly
and Assembly" .
Tool number : — (J-47245)
LBIA0455E
WBIA0437E
SEM715A
WBIA0438E