2006 INFINITI QX56 height

SERVICE DATA AND SPECIFICATIONS (SDS)EM-107
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DE
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EM
Revision: November 2009 2006 QX56
CYLINDER HEAD
Unit: mm (in)
Valve Dimensions
Unit: mm (in)
Items
StandardLimit
Head surface distortion 0.03 (0.0012)0.1 (0.004)
Nominal cylinder head height “H ” 126.3 (4.97)
KBIA2554E
Valve head diameter “D” Intake
37.0 - 37.3 (1.457 - 1.469)
Exhaust 31.2 - 31.5 (1.228 - 1.240)
Valve length “ L” Intake
96.21- 96.71 (3.7878 - 3.8075)
Exhaust 93.74 - 94.24 (3.6905 - 3.7102)
Valve stem diameter “ d” Intake
5.965 - 5.980 (0.2348 - 0.2354)
Exhaust 5.955 - 5.970 (0.2344 - 0.2350)
Valve seat angle “α ” Intake
45°15 ′ - 45 °45 ′
Exhaust
Valve margin “T ” Intake
1.1 (0.043)
Exhaust 1.3 (0.051)
SEM188

EM-108Revision: November 2009
SERVICE DATA AND SPECIFICATIONS (SDS)
2006 QX56
Valve Guide
Unit: mm (in)
Valve Seat
Unit: mm (in)
Valve Spring
ItemsStandardOversize [0.2 (0.008)] (service)
Valve guide Outside diameter
10.023 - 10.034 (0.3946 - 0.3950) 10.223 - 10.234 (0.4025 - 0.4029)
Inside diameter (Finished size) 6.000 - 6.018 (0.2362 - 0.2369) —
Cylinder head valve guide hole diameter 9.975 - 9.996 (0.3927 - 0.3935) 10.175 - 10.196 (0.4006 - 0.4014)
Interference fit of valve guide 0.027 - 0.059 (0.0011 - 0.0023)
Items StandardLimit
Stem to guide clearance Intake
0.020 - 0.053 (0.0008 - 0.0021) 0.08 (0.0031)
Exhaust 0.030 - 0.063 (0.0012 - 0.0025) 0.09 (0.0035)
Projection length “L ” Intake
12.6 - 12.8 (0.496 - 0.504)
Exhaust 12.5 - 12.9 (0.492 - 0.508)
KBIA2555E
Items StandardOversize [0.5 (0.020)] (Service)
Cylinder head seat recess diameter ″D ″ Intake 38.000 - 38.016 (1.4961 - 1.4967) 38.500 - 38.516 (1.5157 - 1.5164)
Exhaust 32.200 - 32.216 (1.2677 - 1.2683) 32.700 - 32.716 (1.2874 - 1.2880)
Valve seat interference fit Intake
0.081 - 0.113 (0.0032 - 0.0044)
Exhaust 0.064 - 0.096 (0.0025 - 0.0038)
Valve seat diameter ″d ″ Intake 38.097 - 38.113 (1.4999 - 1.5005) 38.597 - 38.613 (1.5196 - 1.5202)
Exhaust 32.280 - 32.296 (1.2709 - 1.2715) 32.780 - 32.796 (1.2905 - 1.2912)
KBIA2541E
Free height mm (in)
50.58 (1.9913)
Pressure N (kg, lb) at height mm (in) Installation
165.8 - 187.0 (16.9 - 19.1, 37 - 42) at 37.0 (1.457)
Valve open 314.8 - 355.0 (32.1 - 36.2, 71 - 80) at 28.2 (1.110)
Out-of-square mm (in) Less than 2.2 (0.087)

EX-4Revision: November 2009
EXHAUST SYSTEM
2006 QX56
REMOVAL
Remove exhaust system components using power tool.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

Always replace exhaust gaskets with new ones when reassembling.

Before installing a new heated oxygen sensor, clean and lube the exhaust tube threads using Tool.

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; replace with a new one.

Do not over-torque the heated oxygen sensor. Doing so may damage the heated oxygen sensor,
resulting in the MIL coming on.

If any mounting insulator is badly deformed, repair or replace it. If deposits such as mud pile up on
the mounting insulators, clean and inspect them.

Temporarily tighten the nuts on the exhaust manifold side and the bolts on the vehicle side. Check
each part for interference with other components, and then tighten the nuts and bolts to specifica-
tion.
INSPECTION AFTER INSTALLATION

With the engine running, check exhaust tube joints for gas leakage and unusual noises.

Check to ensure that mounting brackets and mounting rubbers are installed properly and free from undue
stress. Improper installation could result in excessive noise and vibration. Tool number
A : — (J-43897-18)
B : — (J-43897-12)

FFD-14
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
Disassembly and AssemblyEDS00457
COMPONENTS
1. Side bearing adjuster2. Side bearing 3. Side gear thrust washer
4. Side gear 5. Lock pin 6. Pinion mate thrust washer
7. Pinion mate gear 8. Pinion mate shaft 9. Drive pinion
10. Drive pinion height adjusting washer 11. Drive pinion rear bearing 12. Collapsible spacer
13. Breather tube 14. Differential side flange 15. Dust shield
16. Circular clip 17. Side oil seal 18. Drive pinion front bearing
19. Front oil seal 20. Companion flange 21. Drive pinion lock nut
22. Drain plug 23. Differential side shaft 24. Differential side shaft bearing
25. Extension tube 26. O-ring 27. Gear carrier
28. Plate 29. Differential case 30. Drive gear
31. Side bearing cap 32. Filler plug 33. Carrier cover
SDIA3207E

FFD-16
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
Tooth Contact
1. Apply red lead to the drive gear.
NOTE:
Apply red lead to both faces of three to four gears, at four loca-
tions evenly spaced on the drive gear.
2. Rotate the drive gear back and forth several times. Then check for correct drive pinion to drive gear tooth contact as shown.
CAUTION:
Check tooth contact on drive side and reverse side.
3. If the tooth contact is improperly adjusted, follow the procedure below to adjust the drive pinion height (dimension X).

If the tooth contact is near the face (face contact), or near the
heel (heel contact), use a thicker drive pinion height adjusting
washer to move drive pinion closer to the drive gear.
Refer to FFD-32, "
Drive Pinion Height Adjusting Washer" .
SPD357
SDIA0570E
SDIA0517E
PDIA0440E

FRONT FINAL DRIVE ASSEMBLYFFD-17
CE F
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FFD
Revision: November 2009 2006 QX56

If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), use a thinner drive pinion height adjusting
washer to move the drive pinion farther from the drive gear.
Refer to FFD-32, "
Drive Pinion Height Adjusting Washer" .
Backlash
1. Fit a dial indicator to the drive gear face to measure the back-
lash.

If the backlash is outside of the specification, adjust each side
bearing adjuster.
CAUTION:
Do not change the side bearing adjusters by different
amounts as it will change the side bearing preload torque.
Companion Flange Runout
1. Rotate companion flange and check for runout on the compan-ion flange face (inner side of the bolt holes) and companion
flange inner side (socket diameter) using suitable tool.
2. If the runout is outside the runout limit, follow the procedure below to adjust.
a. Rotate the companion flange on the drive pinion by 90 °, 180 °
and 270 ° while checking for the position where the runout is
minimum.
b. If the runout is still outside of the runout limit after the companion flange has been rotated on the drive pin- ion, possible cause could be an assembly malfunction of drive pinion and drive pinion bearing or a mal-
functioning drive pinion bearing.
c. If the runout is still outside of the runout limit after repair of the assembly of drive pinion and drive pinion bearing or drive pinion bearing, replace the companion flange.
PDIA0441E
Backlash: 0.12 - 0.20 mm (0.0050 - 0.0079 in)
SPD513
If the backlash is greater than specification:
Loosen side bearing adjuster A and tighten side bear-
ing adjuster B by the same amount.
If the backlash is less than specification: Loosen side bearing adjuster B and tighten side bear-
ing adjuster A by the same amount.
SDIA2262E
Runout limit Companion flange face: 0.10 mm (0.0039 in)
Companion flange inner side: 0.13 mm (0.0051 in)
SDIA2078E

FFD-22
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
6. Remove the drive pinion rear bearing inner race and drive pinion
height adjusting washer using Tool.
7. Place a small hole in the front oil seal case using suitable tool.
8. Remove the front oil seal using Tool as shown.
9. Remove the drive pinion front bearing inner race.
10. Remove the drive pinion front bearing outer race using Tool as shown. Locate the driver on the back edge of the drive pinion
front bearing outer race, then drive the drive pinion front bearing
outer race out.
CAUTION:
Do not damage gear carrier.
11. Remove the drive pinion rear bearing outer race using Tool as shown. Locate the driver on the back edge of the drive pinion
rear bearing outer race, then drive the drive pinion rear bearing
outer race out.
CAUTION:
Do not damage gear carrier.Tool number : ST30021000 ( — )
S-PD179
LDIA0129E
Tool number : SP8P
LDIA0130E
Tool number A: C-4171
B: D-103
LDIA0131E
Tool number A: C-4171B: C-4307
LDIA0132E

FFD-24
FRONT FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
2. Using feeler gauges, measure the clearance between the side
gear back and differential case at three different points, while
rotating the side gear. Average the three readings to calculate
the clearance. (Measure the clearance of the other side as well.)

If the side gear back clearance is outside of the specification,
use a thicker or thinner side gear thrust washer to adjust.
Refer to FFD-32, "
Side Gear Thrust Washer" .
CAUTION:

Insert feeler gauges with the same thickness on both
sides to prevent side gear from tilting.

Each gear should rotate smoothly without excessive
resistance during differential motion.

Select a side gear thrust washer for right and left individ-
ually.
NOTE:
Side gear back clearance is clearance between side gear and differential case for adjusting side gear
backlash.
Drive Pinion Height

Drive gear and drive pinion are supplied in matched sets only.
Matching numbers on both drive pinion and drive gear are
etched for verification. If a new gear set is being used, verify the
numbers of each drive pinion and drive gear before proceeding
with assembly.

The mounting distance from the centerline of the drive gear to the back face of the drive pinion for the
M205 final drive assembly is 103.5 mm (4.0748 inches).
On the button end of each drive pinion, there is etched a plus (+) number, a minus (-) number, or a zero
(0), which indicates the best running position for each particular gear set. This dimension is controlled by
a selective drive pinion height adjusting washer between the drive pinion rear bearing inner race and drive
pinion.
For example: If a drive pinion is etched m+8 (+3), it would require 0.08 mm (0.003 inch) less drive pinion
height adjusting washer than a drive pinion etched “0”. This means decreasing drive pinion height adjust-
ing washer thickness; increases the mounting distance of the drive pinion to 103.6 mm (4.0778 inches). If
a drive pinion is etched m-8 (-3), it would require adding 0.08mm (0.003 inch) more to the drive pinion
height adjusting washer than would be required if the drive pinion were etched “0”. By adding 0.08 mm
(0.003 inch), the mounting distance of the drive pinion was decreased to 103.4 mm (4.0718 inches) which
is just what a m-8 (-3) etching indicated.

To change the drive pinion height, use different drive pinion height adjusting washers which come in differ-
ent thickness.

Use the following tables as a guide for selecting the correct drive pinion height adjusting washer thickness
to add or subtract from the old drive pinion height adjusting washer. Side gear back clearance: 0.20 mm (0.0079 in) or less
If the side gear back clearance is greater than
specification:
Use a thicker side gear thrust washer.
If the side gear back clearance is less than
specification: Use a thinner side gear thrust washer.
PDIA0576E
SDIA2241E