steering INFINITI M35 2006 Factory Service Manual

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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 January2006 M35/M45
5. Drain engine coolant from radiator. Refer to CO-40, "Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
6. Remove radiator. Refer to CO-43, "
RADIATOR" .
7. Remove drive belts. Refer to EM-174, "
DRIVE BELTS" .
8. Remove exhaust front tube with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
9. Remove air fuel ratio sensor 1 as follows:
a. Disconnect harness connector of each air fuel ratio sensor 1.
b. Remove air fuel ratio sensor 1 on both bank with heated oxygen
sensor wrench (SST).
CAUTION:
Be careful not to damage air fuel ratio sensor 1.
Discard any air fuel ratio sensor 1 which has been
dropped onto a hard surface such as a concrete floor;
replace with a new one.
10. Remove exhaust manifold and three way catalyst (left bank) as follows:
a. Disconnect A/C piping from A/C compressor, then remove A/C compressor with power tool. Refer to AT C -
151, "REFRIGERANT LINES" .
b. Remove steering lower joint to enable steering shaft to move freely. Refer to PS-13, "
STEERING COL-
UMN" .
c. Remove starter motor. Refer to SC-10, "
STARTING SYSTEM" .
d. Remove nuts on bottom of engine mounting insulator (LH), and lift up left side of engine approximately 3
cm (1.18 in) with transmission jack. Refer to EM-244, "
ENGINE ASSEMBLY" .
e. Remove exhaust manifold cover (left bank).
f. Loosen nuts in the reverse order of figure to remove exhaust
manifold and three way catalyst (left bank) with power tool.
NOTE:
Disregard No. 9 to No. 12 when loosening.
11. Remove exhaust manifold and three way catalyst (right bank) as follows:
a. Remove alternator and bracket. Refer to SC-23, "
CHARGING SYSTEM" .
PBIC2333E
A : Left bank
B : Right bank
: Engine front
PBIC3300E

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TIMING CHAIN
Revision: 2006 January2006 M35/M45
a. Remove rear plate cover, and set ring gear stopper (SST).
b. Loosen crankshaft pulley bolt, and then pull crankshaft pulley
with both hands to remove it.
CAUTION:
Do not remove crankshaft pulley bolt. Keep loosened
crankshaft pulley bolt in place to protect removed crank-
shaft pulley from dropping.
Do not remove balance weight (inner hexagon bolt) at the
front of crankshaft pulley.
9. Remove oil pan and oil strainer. Refer to EM-187, "
OIL PAN AND OIL STRAINER" .
10. Remove front cover as follows:
a. Loosen mounting bolts in reverse order as shown in the figure.
b . U s e s e a l c u t t e r [ S S T: K V 1 0 1111 0 0 ( J 3 7 2 2 8 ) ] t o c u t l i q u i d g a s ket
for removal.
CAUTION:
Exercise care not to damage mating surfaces.
After removal, handle front cover carefully so it does not
tilt, cant, or warp under a load.
11. Remove front oil seal from front cover using suitable tool.
Use screwdriver for removal.
CAUTION:
Be careful not to damage front cover.
12. Remove O-rings from cylinder heads (right and left bank) and
cylinder block.
13. Remove chain tensioner cover from front cover.
Use seal cutter [SST: KV10111100 (J37228)] to cut liquid gasket for remove.
14. Remove oil pump drive spacer.
Set bolts in the two bolt holes [M6 pitch 1.0 mm (0.04 in)] on
front surface. Using suitable puller, pull oil pump drive spacer
off from crankshaft.
NOTE:
The dimension between the centers of the two bolt holes is 33
mm (1.30 in).
In the figure, a commercial steering puller is used.
15. Remove oil pump. Refer to LU-30, "
OIL PUMP" .
16. Remove chain tensioner (left bank) as follows:
PBIC1656E
KBIA0354J
SBIA0373E
PBIC2342E

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TIMING CHAIN
Revision: 2006 January2006 M35/M45
f. Further tighten by 90 degrees. (Angle tightening)
Check the tightening angle by referencing to the notches. The
angle between two notches is 90 degrees.
15. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns
smoothly.
16. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.
Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
Use procedure below to check for fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.
Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in guide may gen-
erate a pounding noise during and just after engine start. However, this does not indicate an unusualness.
Noise will stop after hydraulic pressure rises.
Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.
Bleed air from lines and hoses of applicable lines, such as in cooling system.
After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
PBIC2346E
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

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CAMSHAFT
Revision: 2006 January2006 M35/M45
4. Crank the engine, and then make sure that engine oil comes out
from intake valve timing control cover oil hole. End crank after
checking.
WA R N I N G :
Be careful not to touch rotating parts (drive belt, idler pul-
ley, and crankshaft pulley, etc.).
CAUTION:
Engine oil may squirt from intake valve timing control sole-
noid valve installation hole during cranking. Use a shop
cloth to prevent the engine components and the vehicle. Do
not allow engine oil to get on rubber components such as
drive belt or engine mount insulators. Immediately wipe off
any splashed engine oil.
Clean oil groove between oil strainer and intake valve timing control solenoid valve if engine oil does not
come out from intake valve timing control cover oil hole. Refer to LU-24, "
LUBRICATION SYSTEM" .
5. Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT),
and then check each oil groove for clogging.
Clean oil groove if necessary. Refer to LU-24, "LUBRICATION SYSTEM" .
6. After inspection, install removed parts.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.
Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
Use procedure below to check for fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.
Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in guide may gen-
erate a pounding noise during and just after engine start. However, this does not indicate an unusualness.
Noise will stop after hydraulic pressure rises.
Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.
Bleed air from lines and hoses of applicable lines, such as in cooling system.
After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Valve ClearanceNBS004PB
INSPECTION
In cases of removing/installing or replacing camshaft and valve-related parts, or of unusual engine conditions
due to changes in valve clearance (found malfunctions during starting, idling or causing noise), perform
inspection as follows:
1. Remove rocker covers (right and left bank). Refer to EM-199, "
ROCKER COVER" .
PBIC2848E
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

ENGINE ASSEMBLY
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Always use the support point specified for lifting.
Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.
For supporting points for lifting and jacking point at rear axle, refer to GI-42, "Garage Jack and
Safety Stand and 2-Pole Lift" .
REMOVAL
Outline
At first, remove engine, transmission assembly with front suspension member from vehicle downward. Then
separate engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-809, "FUEL PRESSURE RELEASE" .
2. Drain engine coolant from radiator. Refer to CO-40, "
Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
3. Disconnect both battery cables. Refer to SC-4, "
BATTERY" .
4. Remove crankshaft position sensor (POS) from transmission.
CAUTION:
Handle carefully to avoid dropping and shocks.
Do not disassemble.
Do not allow metal powder to adhere to magnetic part at sensor tip.
Do not place sensors in a location where they are exposed to magnetism.
5. Remove the following parts:
Front and rear engine undercover (power tool)
Air duct (inlet), air duct and air cleaner case assembly; Refer to EM-177, "AIR CLEANER AND AIR
DUCT" .
Front road wheels and tires (power tool)
Engine Room LH
1. Disconnect heater hoses, and install plugs to avoid leakage of engine coolant.
2. Disconnect wire bonding from exhaust manifold cover to vehicle.
3. Disconnect vacuum hose between vehicle and engine and set it aside.
4. Discharge refrigerant from A/C circuit. Refer to ATC-151, "
REFRIGERANT LINES" .
5. Remove A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to AT C -
151, "REFRIGERANT LINES" .
Engine Room RH
1. Disconnect fuel feed hose and EVAP hose. Refer to EM-193, "FUEL INJECTOR AND FUEL TUBE" .
CAUTION:
Fit plugs onto disconnected hose to prevent fuel leak.
2. Disconnect ground cable (between vehicle and right bank cylinder head).
3. Disconnect vacuum hose between vehicle and engine and set it aside.
4. Disconnect reservoir tank of power steering oil pump from engine, and move it aside for easier work.
CAUTION:
When temporarily securing, keep reservoir tank upright to avoid a fluid leak.
Ve h i c le i n s i d e
Follow procedure below to disconnect engine room harness connectors at passenger room side, and tempo-
rarily secure them on engine.
1. Remove passenger-side kicking plate, dash side finisher, and glove box. Refer to EI-37, "
BODY SIDE
TRIM" and IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect engine room harness connectors at unit sides TCM, ECM and other.

EM-246
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ENGINE ASSEMBLY
Revision: 2006 January2006 M35/M45
3. Disengage intermediate fixing point. Pull out engine room harnesses to engine room side, and temporarily
secure them on engine.
CAUTION:
When pulling out harnesses, take care not to damage harnesses and connectors.
After temporarily securing, cover connectors with vinyl or similar material to protect against for-
eign material adhesion.
Vehicle Underbody
1. Remove A/T fluid cooler hoses and power steering oil pump oil cooler hoses.
Install plug to avoid leakage of A/T fluid and power steering fluid.
2. Disconnect heated oxygen sensor 2 harness. Refer to EX-3, "
EXHAUST SYSTEM" .
3. Remove exhaust front tube with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
4. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to PS-13, "
STEERING COLUMN" .
5. Separate steering outer sockets from steering knuckle. Refer to PS-18, "
POWER STEERING GEAR" .
6. Remove A/T control rod at control device assembly side. Then temporarily secure it on transmission, so
that it does not sag. Refer to AT-222, "
SHIFT CONTROL SYSTEM" .
7. Remove rear plate cover from oil pan. Then remove bolts fixing drive plate to torque converter. Refer to
EM-187, "
OIL PAN AND OIL STRAINER" and AT-271, "TRANSMISSION ASSEMBLY" .
8. Remove transmission joint bolts which pierce at oil pan lower rear side. Refer to AT- 2 7 1 , "
TRANSMIS-
SION ASSEMBLY" .
9. Remove lower ends of left and right strut from transverse link. Refer to FSU-6, "
FRONT SUSPENSION
ASSEMBLY" .
10. Remove transverse link mounting bolts at knuckle side. Refer to FSU-14, "
TRANSVERSE LINK" .
11. Remove front stabilizer at transverse link side. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
12. Remove rear propeller shaft. Refer to PR-6, "
REAR PROPELLER SHAFT" .
Removal Work
1. Use manual lift table caddy (commercial service tool) or equiva-
lently rigid tool such as transmission jack. Securely support bot-
tom of suspension member and transmission assembly.
CAUTION:
Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.
2. Remove engine rear member mounting bolts.
3. Remove front suspension member mounting nuts and bolts with power tool. Refer to FSU-6, "
FRONT
SUSPENSION ASSEMBLY" .
4. Carefully lower jack, or raise lift to remove engine, transmission and front suspension member assembly.
When performing work, observe the following caution:
CAUTION:
Confirm there is no interference with vehicle.
Make sure that all connection points have been disconnected.
Keep in mind the center of vehicle gravity changes. If necessary, use jack(s) to support vehicle
at rear jacking point(s) to prevent it from falling it off the lift.
PBIC0804E

EM-248
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ENGINE ASSEMBLY
Revision: 2006 January2006 M35/M45
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc. Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

FAX-4
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: 2006 January2006 M35/M45
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartNDS000FE
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
: ApplicableReference page
—
FA X - 1 4—
FAX-5—
FAX-5
NVH in FAX and FSU sections
Refer to Front axle in this chart.
NVH in WT section
NVH in WT section
Refer to DRIVE SHAFT in this chart.
NVH in BR section
NVH in PS section
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
Wheel bearing damage
FRONT AXLE AND FRONT SUSPENSION
FRONT AXLE
TIRES
ROAD WHEELS
DRIVE SHAFT
BRAKES
STEERING
SymptomDRIVE
SHAFTNoise
Shake
FRONT
AXLENoise
Shake
Vibration
Shimmy
Judder
Poor quality ride or handling

FRONT WHEEL HUB AND KNUCKLE
FAX-5
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FA X
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FRONT WHEEL HUB AND KNUCKLEPFP:40202
On-Vehicle Inspection and ServiceNDS000FF
Make sure that the mounting conditions (looseness, backlash) of each component and component conditions
(wear, damage) are normal.
WHEEL BEARING INSPECTION
Move wheel hub and bearing assembly in the axial direction by hand. Make sure there is no looseness of
wheel bearing.
Rotate wheel hub and make sure that is no unusual noise or other irregular conditions. If there is any of
irregular conditions, replace wheel hub and bearing assembly
Removal and InstallationNDS000FG
COMPONENT
Refer to GI section for symbol marks in the figure. Refer to GI-9, "HOW TO USE THIS MANUAL" .
REMOVAL
Wheel Hub and Bearing Assembly
1. Remove tires from vehicle with a power tool.
2. Remove wheel sensor from steering knuckle. Refer to BRC-57, "
WHEEL SENSOR" .
CAUTION:
Do not pull on wheel sensor harness.
3. Remove brake hose bracket. Refer to BR-12, "
BRAKE TUBE AND HOSE" .
4. Remove torque member fixing bolts with a power tool. Hang torque member in a place where it will not
interfere with work. Refer to BR-23, "
FRONT DISC BRAKE" .
CAUTION:
Do not depress brake pedal while brake caliper is removed.Axial end play : 0.05 mm (0.002 in) or less
1. Steering knuckle 2. Cotter pin 3. Splash guard
4. Wheel hub and bearing assembly 5. Washer A. AWD models
SDIA3256E

FAX-6
FRONT WHEEL HUB AND KNUCKLE
Revision: 2006 January2006 M35/M45
5. Put matching mark on disc rotor and wheel hub and bearing
assembly, then remove disc rotor.
6. Remove cotter pin, then loosen hub lock nut with a power tool.
(AWD)
7. Separate wheel hub and bearing assembly from drive shaft by
lightly tapping the end with a hammer (suitable tool) and a wood
block, and then remove hub lock nut. (AWD)
CAUTION:
Do not place drive shaft joint at an extreme angle. Also be
careful not to overextend slide joint.
Do not allow drive shaft to hang down without support for
housing (or joint sub-assembly), shaft and the other
parts.
NOTE:
Use a puller (suitable tool) if wheel hub and bearing assembly
and drive shaft cannot be separated even after performing the
above procedure.
8. Remove wheel hub and bearing assembly mounting bolts, and then remove splash guard and wheel hub
and bearing assembly from steering knuckle.
Steering knuckle
1. Refer to the procedure from 1 to 7 in “Wheel Hub and Bearing Assembly” FA X - 5 , "REMOVAL" .
2. Remove cotter pin (1), and then loosen the nut.
3. Remove steering outer socket (2) from steering knuckle (3) so
as not to damage ball joint boot (4) using the ball joint remover
(suitable tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover (suitable tool) from
suddenly coming off.
4. Remove cotter pin of transverse link and steering knuckle, and
then loosen nut.
5. Remove transverse link from steering knuckle so as not to dam-
age ball joint boot using the ball joint remover (suitable tool).
CAUTION:
Temporarily tighten the nut to prevent damage to threads and to prevent ball joint remover (suit-
able tool) from suddenly coming off.
6. Remove fixing nut and bolt with a power tool, and then remove steering knuckle from upper link. Refer to
FSU-8, "
Components" .
7. Remove wheel hub and bearing assembly mounting bolts, and then remove splash guard and wheel hub
and bearing assembly from steering knuckle.
INSPECTION AFTER REMOVAL
Check components for deformation, cracks, and other damage. Replace if there are.
Ball Joint Inspection
Check boots of transverse link and steering outer socket ball joint for breakage, axial play, and torque. Refer to
FSU-14, "
INSPECTION AFTER REMOVAL" , “TRANSVERSE LINK”, PS-22, "INSPECTION AFTER DISAS-
SEMBLY" , “POWER STEERING GEAR”.
SDIA2608E
SDIA1821E
SGIA1183E