2006 INFINITI QX56 check oil

EM-86Revision: November 2009
CYLINDER BLOCK
2006 QX56
15. Tighten connecting rod bolts using Tool.

Apply engine oil to threads and seats of connecting rod bolts.

After tightening bolts, make sure the crankshaft rotates
smoothly.

Check connecting rod side clearance. Refer to EM-94, "CON-
NECTING ROD SIDE CLEARANCE" .
16. Install knock sensors. CAUTION:
If knock sensor is dropped, replace it with a new one.

Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.

Install it with its connector facing the center of the cylinder
block side.

Do not tighten knock sensor bolts while holding connector.

Make sure knock sensor does not interfere with other parts.

Position the sub-harness as shown before installing intake
manifold.
17. Installation of the remaining components is in the reverse order of removal.
18. Remove engine assembly from engine stand.
19. Install drive plate.

Align dowel pin of crankshaft rear end with pin holes of each
part to install. Tool number : KV10112100 (BT-8653-A)
Connecting rod bolts
Step 1
: 19.6 N·m (1.5 kg-m, 11 ft-lb)
Step 2 : 90° clockwise
WBIA0627E
KBIA2493E
KBIA2549E
KBIA2494E

CYLINDER BLOCKEM-95
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Revision: November 2009 2006 QX56
Piston and Piston Pin Clearance
(Piston pin clearance) = (Piston pin hole diameter) – (Piston pin
diameter)

If clearance exceeds specification, replace either or both the pis-
ton/piston pin assembly and the connecting rod assembly with
reference to the specification of each part.

Refer to the piston selection table to replace piston/piston pin
assembly. Refer to EM-87, "
HOW TO SELECT PISTON" .

Refer to the connecting rod bearing selection table to replace
connecting rod. Refer to EM-88, "
HOW TO SELECT CON-
NECTING ROD BEARING" .
NOTE:
The connecting rod small end grade and piston pin hole (piston
pin) grade are provided only for the parts installed at the plant.
For service parts, no grades can be selected (only 0 grade is
available).

Refer to EM-96, "CONNECTING ROD BUSHING OIL CLEAR-
ANCE (SMALL END)" for the values for each grade at the plant.
PISTON RING SIDE CLEARANCE

Measure side clearance of the piston ring and piston ring groove
using suitable tool.

If out of specification, replace piston and/or piston ring assembly.
PISTON RING END GAP

Check if the diameter of the cylinder bore is within specification.
Refer to EM-99, "
Piston to Cylinder Bore Clearance" .

Insert the piston ring into the middle of the cylinder using the pis-
ton, and measure the gap.Standard : 0.002 - 0.006 mm (0.0001 - 0.0002 in)
KBIA2496E
KBIA2536E
Standard:
Top ring : 0.035 - 0.085 mm (0.0014 - 0.0033 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.015 - 0.050 mm (0.0006 - 0.0020 in)
Limit: Top ring : 0.11 mm (0.0043 in)
2nd ring : 0.10 mm (0.0039 in)
SEM024AA
Standard Top ring : 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring : 0.25 - 0.40 mm (0.0098 - 0.0157 in)
Oil ring : 0.20 - 0.60 mm (0.0079 - 0.0236 in)
Limit: Top ring : 0.56 mm (0.0220 in)
2nd ring : 0.52 mm (0.0205 in)
Oil ring : 0.96 mm (0.0378 in)
PBIC0118E

EM-96Revision: November 2009
CYLINDER BLOCK
2006 QX56

If out of specification, replace piston ring. If the gap still exceeds the limit even with a new ring, re-bore the
cylinder and use oversized piston and piston ring.
CONNECTING ROD BEND AND TORSION

Check connecting rod alignment using suitable tool.

If measurement exceeds the limit, replace connecting rod
assembly.
CONNECTING ROD BEARING (BIG END)

Install the connecting rod cap without the connecting rod bearing
installed. After tightening the connecting rod bolt to the specified
torque, measure the connecting rod large end inside diameter.
Refer to EM-82, "
ASSEMBLY" .

If measurement exceeds the standard, replace connecting rod.
CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)
Connecting Rod Inside Diameter (Small End)

Measure inside diameter of bushing using suitable tool.Limit:
Bend: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length
To r s i o n : 0.30 mm (0.0118 in) per 100 mm (3.94 in) length
SEM003F
SEM038F
Standard : 57.000 - 57.013 mm (2.2441 - 2.2446 in)
PBIC1641E
Standard : 22.000 - 22.006 mm (0.8661 - 0.8664 in)
PBIC0120E

EM-102Revision: November 2009
CYLINDER BLOCK
2006 QX56
Method of Using Plastigage

Remove oil and dust on the crankshaft journal and surfaces of
each bearing completely.

Cut a plastigage slightly shorter than the bearing width, and
place it in crankshaft axial direction, avoiding oil holes.

Install the main bearings to the cylinder block and main bearing
cap, and tighten the main bearing bolts to the specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.

Remove bearing cap and bearings. Measure plastigage width
using the scale on the plastigage bag.
NOTE:
The procedure when the measured value exceeds the repair limit is the same as that described in
“Method of Measurement”.
CRUSH HEIGHT OF MAIN BEARING

When the bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of the
bearing must protrude. Refer to EM-82, "
ASSEMBLY" for the
tightening procedure.

If standard is not met, replace main bearings.
CRUSH HEIGHT OF CONNECTING ROD BEARING

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with the connecting rod bearings
installed, the tip end of the bearing must protrude. Refer to EM-
82, "ASSEMBLY" for tightening procedure.

If standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT DIAMETER

Check for bolts (M9 and M12) installed from lower side using the
following procedure.
NOTE:

Side bolt (M10) is outside the target.

Figure shows M12 bolt.

Measure bolt diameter ″d1″ from tip of the bolt to dimension "a".

Measure bolt diameter ″d2 ″ from the dimension between tip of
the bolt and dimension ″b ″ as base station to dimension ″c ″.
NOTE:
If a narrower part in the threads is determined by visual check,
measure ″d2 ″ at that point.

Calculate the difference between ″d1 ″ and ″d2 ″.
KBIA2551E
Standard : There must be crush height
SEM502G
Standard : There must be crush height.
PBIC1646E
KBIA2497E

DRIVE SHAFTFAX-7
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Revision: November 2009 2006 QX56
DRIVE SHAFTPFP:39100
Removal and InstallationEDS003BP
REMOVAL
1. Remove wheel and tire using power tool.
2. Remove engine under cover using power tool.
3. Remove wheel sensor harness from mount on knuckle.
CAUTION:
Do not pull on wheel sensor harness.
4. Without disassembling the hydraulic lines, remove brake caliper using power tool. Reposition it aside with wire. Refer to BR-22, "
Removal and Installation of Brake Caliper and Disc Rotor" .
NOTE:
Avoid depressing brake pedal while brake caliper is removed.
5. Remove coil spring and shock absorber assembly using power tool. Refer to FSU-10, "
Removal and
Installation" .
6. Separate upper link ball joint stud from steering knuckle using To o l .

Support lower link with jack.
7. Remove cotter pin, then remove drive shaft nut.
8. Remove drive shaft mounting bolts from front final drive.
9. Remove drive shaft from wheel hub and bearing assembly. CAUTION:

When removing drive shaft, do not apply an excessive
angle to drive shaft joint. Also be careful not to exces-
sively extend slide joint.
INSPECTION AFTER REMOVAL

Move joint up, down, left, right, and in axial direction. Check for any rough movement or significant loose-
ness.

Check boot for cracks or other damage, and for grease leakage.

If damaged, disassemble drive shaft to verify damage, and
repair or replace as necessary.
1. Cotter pin 2. Drive shaft nut3. Drive shaft
WDIA0329E
Tool number : ST29020001 (J-24319-01)
LEIA0095E
RAA0030D

FFD-1
FRONT FINAL DRIVE
D DRIVELINE/AXLE
CONTENTS
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A
B
FFD
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions for Servicing Front Final Drive ......... ..... 2
PREPARATION ...................................................... ..... 3
Special Service Tools .......................................... ..... 3
Commercial Service Tools ................................... ..... 5
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 6
NVH Troubleshooting Chart ................................ ..... 6
DIFFERENTIAL GEAR OIL ................................... ..... 7
Changing Differential Gear Oil ............................ ..... 7
DRAINING ........................................................ ..... 7
FILLING ............................................................ ..... 7
Checking Differential Gear Oil ............................. ..... 7
DIFFERENTIAL GEAR OIL LEAKAGE AND
LEVEL .............................................................. ..... 7
FRONT OIL SEAL ................................................. ..... 8
Removal and Installation ..................................... ..... 8
REMOVAL ........................................................ ..... 8
INSTALLATION ................................................ ..... 9
SIDE OIL SEAL ..................................................... ... 10
Removal and Installation ..................................... ... 10
REMOVAL ........................................................ ... 10
INSTALLATION ................................................ ... 10CARRIER COVER .................................................
... 11
Removal and Installation ..................................... ... 11
REMOVAL ........................................................ ... 11
INSTALLATION ................................................ ... 11
FRONT FINAL DRIVE ASSEMBLY ....................... ... 12
Removal and Installation ..................................... ... 12
REMOVAL ........................................................ ... 12
INSTALLATION ................................................ ... 13
Disassembly and Assembly ................................. ... 14
COMPONENTS ................................................ ... 14
ASSEMBLY INSPECTION AND ADJUSTMENT ... 15
DISASSEMBLY ................................................ ... 18
INSPECTION AFTER DISASSEMBLY ............. ... 23
ADJUSTING AND SELECTING WASHERS .... ... 23
ASSEMBLY ...................................................... ... 25
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 31
General Specifications ......................................... ... 31
Inspection and Adjustment .................................. ... 31
DRIVE GEAR RUNOUT ................................... ... 31
SIDE GEAR CLEARANCE ............................... ... 31
PRELOAD TORQUE ........................................... 31
BACKLASH ...................................................... ... 31
COMPANION FLANGE RUNOUT .................... ... 31
SELECTIVE PARTS ......................................... ... 32

FFD-2
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
Precautions for Servicing Front Final DriveEDS0044X

Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.

Check for the correct installation status prior to removal or disassembly. When matching marks are
required, be certain they do not interfere with the function of the parts they are applied to.

Overhaul should be done in a clean work area, a dust proof area is recommended.

Before disassembly, completely remove sand and mud from the exterior of the unit, preventing them from
entering into the unit during disassembly or assembly.

Always use shop paper for cleaning the inside of components.

Avoid using cotton gloves or a shop cloth to prevent the entering of lint.

Check appearance of the disassembled parts for damage, deformation, and abnormal wear. Replace
them with new ones if necessary.

Gaskets, seals and O-rings should be replaced any time the unit is disassembled.

Clean and flush the parts sufficiently and blow them dry.

Be careful not to damage sliding surfaces and mating surfaces.

When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil,
and foreign materials from the application and mating surfaces.

In principle, tighten nuts or bolts gradually in several steps working diagonally from inside to outside. If a
tightening sequence is specified, observe it.

During assembly, observe the specified tightening torque.

Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.

DIFFERENTIAL GEAR OILFFD-7
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FFD
Revision: November 2009 2006 QX56
DIFFERENTIAL GEAR OILPFP:KLD30
Changing Differential Gear OilEDS00451
DRAINING
1. Stop the engine.
2. Remove the drain plug from the front final drive assembly to drain the differential gear oil.
3. Install the drain plug with sealant applied on the threads to the front final drive assembly. Tighten to the
specified torque. Refer to FFD-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to GI-46, "Recommended Chemical Prod-
ucts and Sealants" .
FILLING
1. Remove the filler plug from the front final drive assembly.
2. Fill the front final drive assembly with new differential gear oil
until the level reaches the specified level near the filler plug hole.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to FFD-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
Checking Differential Gear OilEDS00452
DIFFERENTIAL GEAR OIL LEAKAGE AND LEVEL
1. Make sure that differential gear oil is not leaking from the front final drive assembly or around it.
2. Check the differential gear oil level from the filler plug hole as
shown.
CAUTION:
Do not start engine while checking differential gear oil level.
3. Install the filler plug with sealant applied on the threads to the front final drive assembly. Tighten to the specified torque. Refer
to FFD-14, "
COMPONENTS" .

Use High Performance Thread Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
Differential gear oil
grade and capacity
: Refer to
MA-11, "
Fluids
and Lubricants" .
LDIA0176E
LDIA0176E