2006 INFINITI M35 low oil pressure

PRECAUTIONS
EM-5
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Revision: 2006 January2006 M35/M45
[VQ35DE]PRECAUTIONSPFP:00001
Precautions for Procedures without Cowl Top CoverNBS004MF
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectNBS005RR
NOTE:
This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
Remove and install all control units after disconnecting both battery cables with the ignition knob in the
LOCK position.
Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the
ACC position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the
LOCK position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.
Precautions for Drain Engine Coolant and Engine OilNBS004MH
Drain engine coolant and engine oil when the engine is cooled.
Precautions for Disconnecting Fuel PipingNBS004MI
Before starting work, make sure no fire or spark producing items are in the work area.
Release fuel pressure before disconnecting and disassembly.
After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and DisassemblyNBS004MJ
When instructed to use SST, use specified tools. Always be careful to work safely, avoid forceful or unin-
structed operations.
Exercise maximum care to avoid damage to mating or sliding surfaces.
PIIB3706J

OIL PAN AND OIL STRAINER
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Revision: 2006 January2006 M35/M45
OIL PAN AND OIL STRAINERP F P : 1111 0
Components (2WD Models)NBS004N6
Removal and Installation (2WD Models)NBS004N7
REMOVAL
CAUTION:
To avoid the danger of being scalded, never drain engine oil when the engine is hot.
NOTE:
When removing oil pan (lower) only, steps 2 to 6 are not necessary. Perform step 22 after completing step 7.
1. Remove front and rear engine undercover with power tool.
2. Remove front tire.
1. Oil pan gasket (rear) 2. Oil pan (upper) 3. O-ring
4. Oil pan gasket (front) 5. Oil filter 6. Connector bolt
7. Oil cooler 8. O-ring 9. Relief valve
10. Oil pressure switch 11. Bracket 12. Oil strainer
13. Drain plug 14. Drain plug washer 15. Oil pan (lower)
16. Baffle plate 17. Rear plate cover 18. Crankshaft position sensor (POS)
19. Seal rubber 20. Rear cover plate
PBIC3877E

OIL PAN AND OIL STRAINER
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Revision: 2006 January2006 M35/M45
Components (AWD Models)NBS004N8
Refer to GI-11, "Components" for symbol marks in the figure.
1. Oil pressure switch 2. Oil filter bracket 3. Relief valve
4. O-ring 5. Oil cooler 6. Connector bolt
7. Oil filter 8. O-ring 9. Gasket
10. Oil pan gasket (front) 11. Oil strainer 12. Drain plug
13. Drain plug washer 14. Oil pan (lower) 15. Rear plate cover
16. O-ring (small) 17. Axle pipe 18 O-ring (large)
19. Crankshaft position sensor (POS) 20. Seal rubber 21. Oil pan (upper)
22. Oil pan gasket (rear)
A. Refer to LU-10
B. To oil pump C. Oil pan side
KBIA3553J

ROCKER COVER
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Revision: 2006 January2006 M35/M45
ROCKER COVERPFP:13264
ComponentsNBS004NG
Removal and InstallationNBS004NH
REMOVAL
1. Release the fuel pressure. Refer to EC-98, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
3. Separate engine harness removing their brackets from rocker covers.
4. Remove ignition coil. Refer to EM-42, "
IGNITION COIL" .
5. Remove PCV hoses from rocker covers.
6. Remove PCV valve and O-ring from rocker cover (right bank), if necessary.
7. Remove oil filler cap and oil catcher from rocker cover (left bank), if necessary.
1. PCV hose 2. Oil filler cap 3. Oil catcher
4. Rocker cover (right bank) 5. PCV control valve 6. O-ring
7. Rocker cover gasket 8. Rocker cover (left bank)
PBIC2303E

EM-54
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FRONT TIMING CHAIN CASE
Revision: 2006 January2006 M35/M45
FRONT TIMING CHAIN CASEPFP:13599
Removal and InstallationNBS004NI
NOTE:
This section describes removal/installation procedure of front timing chain case and timing chain related
parts without removing oil pan (upper) on the vehicle.
When oil pan (upper) needs to be removed or installed, or when rear timing chain case is removed or
installed, remove oil pans (upper and lower) first. Then remove front timing chain case, timing chain
related parts, and rear timing chain case in this order, and install in reverse order of removal. Refer to EM-
64, "TIMING CHAIN" .
Refer to EM-64, "TIMING CHAIN" for component parts location.
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Disconnect the battery cable from the negative terminal. Refer to SC-4, "
BATTERY" .
3. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
4. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT"
.
5. Remove front and rear engine undercover with power tool.
6. Release the fuel pressure. Refer to EC-98, "
FUEL PRESSURE RELEASE" .
7. Drain engine oil. Refer to LU-9, "
Changing Engine Oil" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine oil on drive belts.
8. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine coolant on drive belts.
9. Remove radiator hose (upper and lower) and A/T fluid cooler hose. Refer to CO-14, "
RADIATOR" .
10. Separate engine harnesses removing their brackets from front timing chain case.
11. Remove drive belts. Refer to EM-15, "
DRIVE BELTS" .
12. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
13. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside.
Refer to PS-29, "
POWER STEERING OIL PUMP" .
14. Remove power steering oil pump bracket. Refer to PS-29, "
POWER STEERING OIL PUMP" .
15. Remove alternator. Refer to SC-23, "
CHARGING SYSTEM" .
16. Remove water bypass hose, water hose clamp and idler pulley bracket from front timing chain case.
17. Remove intake valve timing control covers.
Loosen mounting bolts in reverse order as shown in the fig-
ure.
U s e t h 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
gasket for removal.
CAUTION:
Shaft is internally jointed with camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.
SEM728G

FRONT TIMING CHAIN CASE
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Revision: 2006 January2006 M35/M45
10. Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns
smoothly.
11. For the following operations, perform steps in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates 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 chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the 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, 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. 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

TIMING CHAIN
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Revision: 2006 January2006 M35/M45
Removal and InstallationNBS004NK
NOTE:
This section describes procedures for removing/installing front timing chain case and timing chain related
parts, and rear timing chain case, when oil pan (upper) needs to be removed/installed for engine overhaul,
etc.
To remove/install front timing chain case, timing chain, and its related parts without removing oil pan
(upper), refer to EM-54, "
FRONT TIMING CHAIN CASE" .
REMOVAL
1. Remove engine room cover (RH and LH) Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove front tire.
3. Disconnect the battery cable from the negative terminal.
4. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
5. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT"
.
6. Remove front and rear engine undercover with power tool.
7. Release the fuel pressure. Refer to EC-98, "
FUEL PRESSURE RELEASE" .
8. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine coolant on drive belts.
9. Remove radiator hose (upper and lower) and A/T fluid cooler hose. Refer to CO-14, "
RADIATOR" .
10. Drain engine oil. Refer to LU-9, "
Changing Engine Oil" .
CAUTION:
Perform this step when the engine is cold.
Do not spill engine oil on drive belts.
11. Separate engine harnesses removing their brackets from front timing chain case.
12. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
13. Remove radiator cooling fan assembly. Refer to CO-22, "
COOLING FAN" .
14. Remove drive belts. Refer to EM-15, "
DRIVE BELTS" .
15. Remove A/C compressor from bracket with piping connected, and temporarily secure it aside. Refer to
ATC-155, "
Removal and Installation of Compressor" .
16. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside.
Refer to PS-29, "
POWER STEERING OIL PUMP" .
17. Remove power steering oil pump bracket. Refer to PS-29, "
POWER STEERING OIL PUMP" .
18. Remove alternator. Refer to SC-23, "
CHARGING SYSTEM" .
19. Remove water bypass hose, water hose clamp and idler pulley bracket from front timing chain case.
20. Remove intake valve timing control covers.
1. Timing chain tensioner (secondary) 2. Internal chain guide 3. Timing chain tensioner (secondary)
4. Camshaft sprocket (EXH) 5. Timing chain (secondary) 6. Timing chain (primary)
7. Camshaft sprocket (INT) 8. Camshaft sprocket (EXH) 9. Timing chain (secondary)
10. Camshaft sprocket (INT) 11. Slack guide 12. Crankshaft sprocket
13. Timing chain tensioner (primary) 14. Intake valve timing control cover 15. Collared O-ring
16. O-ring 17. Chain tensioner cover 18. Intake valve timing control cover
19. Water hose clamp 20. Idler pulley bracket 21. Idler pulley
22. Crankshaft pulley 23. Front oil seal 24. Idler pulley
25. A/C compressor bracket 26. Water pump cover 27. Bracket
28. Front timing chain case 29. Bracket 30. Rear timing chain case
31. O-ring 32. Tension guide 33. Water drain plug (front side)

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TIMING CHAIN
Revision: 2006 January2006 M35/M45
c. Tighten crankshaft pulley bolt.
d. Place a matching mark (A) on crank pulley (1) aligning with the
matching (B) of crank pulley mounting bolt (2). Tighten the bolts
90 degrees (one marks).
NOTE:
The figure shows crankshaft pulley bolt with four marks.
Use an angle wrench (SST) for a crankshaft pulley bolt with
six–marks.
e. Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns
smoothly.
19. For the following operations, perform steps in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates 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 chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the 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, 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.: 44.1 Nꞏm (4.5 kg-m, 33 ft-lb)
PBIC4627J
PBIC3821E