ECU INFINITI M35 2006 Factory Service Manual

EM-22
[VQ35DE]
INTAKE MANIFOLD COLLECTOR
Revision: 2006 January2006 M35/M45
INSTALLATION
Note the following, and install in the reverse order of removal.
Part Installation Direction
Referring to front marks, install parts shown in figure.
Intake Manifold Collector (Lower)
Tighten mounting bolts in numerical order as shown in the figure.
NOTE:
Tighten mounting bolts to secure gasket (lower), intake manifold col-
lector (lower), gasket (upper), and intake manifold collector cover.
Intake Manifold Collector (Upper)
If stud bolts were removed, install them and tighten to the specified torque below.
Shank length under bolt head varies with bolt location. Install
mounting bolts while referring to numbers shown below and in
the figure. (Bolt length does not include pilot portion.)
Tighten mounting bolts in numerical order as shown in the fig-
ure.
Water Hose
Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.
PBIC0776E
PBIC0774E
: 5.9 Nꞏm (0.6 kg-m, 52 in-lb)
Bolt
M6
25 mm (0.98 in) : 7, 8, 10, 11, 13, 14, 15, 16, 18
M6
45 mm (1.77 in) : 2, 4, 5
M6
60 mm (2.36 in) : 1, 3, 6, 9
M6 Nut : 12, 17
PBIC1094E

EM-48
[VQ35DE]
FUEL INJECTOR AND FUEL TUBE
Revision: 2006 January2006 M35/M45
Lubricate O-ring with new engine oil.
Do not clean O-ring with solvent.
Make sure that O-ring and its mating part are free of foreign material.
When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not
to twist or stretch O-ring. If O-ring was stretched while it was being attached, do not insert it
quickly into fuel tube.
Insert new O-ring straight into fuel tube. Do not decenter or twist it.
Insert fuel damper and fuel sub-tube straight into fuel tube.
Tighten mounting bolts evenly in turn.
After tightening mounting bolts, make sure that there is no gap between flange and fuel tube.
2. Install new O-rings to fuel injector, paying attention to the following.
CAUTION:
Upper and lower O-ring are different. Be careful not to confuse them.
Handle O-ring with bare hands. Do not wear gloves.
Lubricate O-ring with new engine oil.
Do not clean O-ring with solvent.
Make sure that O-ring and its mating part are free of foreign material.
When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring. If O-ring was stretched while it was being attached, do not insert it
quickly into fuel tube.
Insert O-ring straight into fuel injector. Do not decenter or twist it.
3. Install fuel injector to fuel tube as follows:
a. Insert clip into clip mounting groove on fuel injector.
Insert clip so that protrusion “A” of fuel injector matches cutout
“A” of clip.
CAUTION:
Do not reuse clip. Replace it with a new one.
Be careful to keep clip from interfering with O-ring. If
interference occurs, replace O-ring.
b. Insert fuel injector into fuel tube with clip attached.
Insert it while matching it to the axial center.
Insert fuel injector so that protrusion “B” of fuel tube matches
cutout “B” of clip.
Make sure that fuel tube flange is securely fixed in flange fix-
ing groove on clip.
c. Make sure that installation is complete by checking that fuel
injector does not rotate or come off.
Make sure that protrusions of fuel injectors are aligned with
cutouts of clips after installation.
4. Install spacers on intake manifold.
5. Install fuel tube and fuel injector assembly to intake manifold.
CAUTION:
Be careful not to let tip of injector nozzle come in contact with other parts. Fuel tube side : Black
Nozzle side : Green
PBIC2545E

EM-54
[VQ35DE]
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

TIMING CHAIN
EM-65
[VQ35DE]
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EM
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)

TIMING CHAIN
EM-69
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Revision: 2006 January2006 M35/M45
31. Remove internal chain guide, tension guide and slack guide.
NOTE:
Tension guide can be removed after removing timing chain (pri-
mary).
32. Remove timing chain (primary) and crankshaft sprocket.
CAUTION:
After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves
will strike the piston heads.
33. Remove timing chain (secondary) and camshaft sprockets as follows:
a. Attach suitable stopper pin to the right and left timing chain ten-
sioners (secondary).
NOTE:
Use approximately 0.5 mm (0.02 in) dia. hard metal pin as a
stopper pin.
For removal of timing chain tensioner (secondary), refer to
EM-84, "
CAMSHAFT" . [Removing camshaft bracket (No. 1)
is required.]
b. Remove camshaft sprocket (INT and EXH) mounting bolts.
Secure the hexagonal portion of camshaft using a wrench to
loosen mounting bolts.
CAUTION:
Do not loosen the mounting bolts with securing anything
other than the camshaft hexagonal portion or with ten-
sioning the timing chain.
c. Remove timing chain (secondary) together with camshaft sprockets.
Turn camshaft slightly to secure slackness of timing chain on timing chain tensioner (secondary) side.
PBIC2266E
PBIC2047E
KBIA1698J

EM-76
[VQ35DE]
TIMING CHAIN
Revision: 2006 January2006 M35/M45
b. Install timing chains (secondary) and camshaft sprockets.
Align the mating marks on timing chain (secondary) (gold link)
with the ones on intake and exhaust camshaft sprockets
(punched), and install them.
NOTE:
Mating marks for intake camshaft sprocket are on the back
side of camshaft sprocket (secondary).
There are two types of mating marks, circle and oval types.
They should be used for the right and left banks, respec-
tively.
Align dowel pin and pin hole on camshafts with the groove
and dowel pin on sprockets, and install them.
On the intake side, align pin hole on the small diameter side of
the camshaft front end with dowel pin on the back side of
camshaft sprocket, and install them.
On the exhaust side, align dowel pin on camshaft front end
with pin groove on camshaft sprocket, and install them.
In case that positions of each mating mark and each dowel
pin are not fit on mating parts, make fine adjustment to the
position holding the hexagonal portion on camshaft with wrench or equivalent.
Mounting bolts for camshaft sprockets must be tightened in the next step. Tightening them by hand is
enough to prevent the dislocation of dowel pins.
It may be difficult to visually check the dislocation of mating
marks during and after installation. To make the matching
easier, make a mating mark on the top of sprocket teeth and
its extended line in advance with paint.
c. After confirming the mating marks are aligned, tighten camshaft
sprocket mounting bolts.
Secure camshaft using a wrench at the hexagonal portion to
tighten mounting bolts.Right bank : Use circle type.
Left bank : Use oval type.
PBIC2981E
PBIC0891E
KBIA1698J

EM-78
[VQ35DE]
TIMING CHAIN
Revision: 2006 January2006 M35/M45
8. Install internal chain guide, slack guide and timing chain ten-
sioner (primary).
CAUTION:
Do not overtighten slack guide mounting bolts. It is normal
for a gap to exist under the bolt seats when mounting bolts
are tightened to the specification.
9. Install the timing chain tensioner (primary) with the following procedure:
a. Pull plunger stopper tab up (or turn lever downward) so as to
remove plunger stopper tab from the ratchet of plunger.
NOTE:
Plunger stopper tab and lever are synchronized.
b. Push plunger into the inside of tensioner body.
c. Hold plunger in the fully compressed position by engaging
plunger stopper tab with the tip of ratchet.
d. To secure lever, insert stopper pin through hole of lever into ten-
sioner body hole.
The lever parts and the tab are synchronized. Therefore, the
plunger will be secured under this condition.
NOTE:
Figure shows the example of 1.2 mm (0.047 in) diameter thin screwdriver being used as the stopper pin.
PBIC2109E
PBIC2633E
PBIC3568E

EM-114
[VQ35DE]
ENGINE ASSEMBLY
Revision: 2006 January2006 M35/M45
REMOVAL
Outline
At first, remove the engine and the transmission assembly with front suspension member from vehicle down-
ward. Then separate the engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-98, "FUEL PRESSURE RELEASE" .
2. Drain engine coolant from radiator. Refer to CO-11, "
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 the following parts:
Engine room cover (RH and LH); Refer toEM-14, "ENGINE ROOM COVER" .
Engine cover; Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" .
Front road wheel and tires (power tool)
Front and rear engine undercover (power tool)
Cowl top cover (RH); Refer to EI-18, "COWL TOP" .
Air duct and air cleaner case assembly; EM-17, "AIR CLEANER AND AIR DUCT" .
5. Discharge refrigerant from A/C circuit. Refer to ATC-151, "
REFRIGERANT LINES" .
6. Remove radiator hoses (upper and lower). Refer to CO-14, "
RADIATOR" .
Engine Room LH
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect wire bonding (between vehicle to left bank cylinder head).
3. Disconnect A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to
AT C - 1 5 1 , "
REFRIGERANT LINES" .
4. Disconnect brake booster vacuum hose.
Engine Room RH
1. Disconnect battery positive cable at vehicle side and temporarily fasten it on engine.
2. Disconnect grounding cable.
3. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
FUEL INJECTOR AND FUEL
TUBE" .
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
4. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-29, "
POWER STEERING OIL PUMP" .
CAUTION:
When temporarily securing, keep the reservoir tank upright to avoid a fluid leak.
Vehicle inside
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.
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.

ENGINE ASSEMBLY
EM-115
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Revision: 2006 January2006 M35/M45
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.
3. Remove three way catalyst and exhaust front tube. 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. Remove rear propeller shaft. Refer to PR-6, "
REAR PROPELLER SHAFT" .
6. Disengage A/T control rod at control device assembly side. Then, temporarily secure it on the transmis-
sion assembly, so that it does not sag. Refer to AT- 2 2 2 , "
SHIFT CONTROL SYSTEM" .
7. Remove rear plate cover from oil pan (upper). Then remove bolts fixing drive plate to torque converter.
Refer to EM-29, "
OIL PAN AND OIL STRAINER" and AT- 2 7 1 , "TRANSMISSION ASSEMBLY" .
8. Remove transmission joint bolts which pierce at oil pan (upper) lower rear side. Refer to AT- 2 7 1 , "
TRANS-
MISSION ASSEMBLY" .
9. Remove front stabilizer at transverse link side. Refer to FSU-18, "
STABILIZER BAR" .
10. Remove lower ends of left and right strut from transverse link. Refer to FSU-6, "
FRONT SUSPENSION
ASSEMBLY" .
11. Separate steering outer sockets from steering knuckle. Refer to PS-18, "
POWER STEERING GEAR" .
12. Remove transverse links mounting bolts at knuckle side. Refer to FSU-14, "
TRANSVERSE LINK" .
Removal Work
1. Use a manual lift table caddy (commercial service tool) or equiv-
alently rigid tool such as a transmission jack. Securely support
bottom of suspension member and the transmission assembly.
CAUTION:
Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.
2. Remove rear engine mounting member bolts.
3. Remove front suspension member mounting bolts and nuts. Refer to FSU-6, "
FRONT SUSPENSION
ASSEMBLY" .
4. Carefully lower jack, or raise lift to remove the engine, the transmission assembly and front suspension
member. When performing work, observe the following caution:
CAUTION:
Confirm there is no interference with the 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 the vehi-
cle at rear jacking point(s) to prevent it from falling it off the lift.
Separation Work
1. Install engine slingers into front of cylinder head (right bank) and
rear of cylinder head (left bank).
PBIC0804E
Slinger bolts:
: 28.0 Nꞏm (2.9 kg-m, 21 ft-lb)
PBIC2061E

EM-116
[VQ35DE]
ENGINE ASSEMBLY
Revision: 2006 January2006 M35/M45
To protect rocker cover against damage caused by tilting of
engine slinger, insert spacer between cylinder head and
engine rear lower slinger, in direction shown in the figure.
NOTE:
Spacer is a component part of engine rear upper slinger
assembly.
2. Remove power steering oil pump from engine side. Refer to PS-29, "
POWER STEERING OIL PUMP" .
3. Remove engine mounting insulators (RH and LH) under side nuts with power tool.
4. Lift with hoist and separate the engine and the transmission assembly from front suspension member.
CAUTION:
Before and during this lifting, always make sure that any harnesses are left connected.
Avoid damage to and oil/grease smearing or spills onto engine mounting insulator.
5. Remove alternator. Refer to SC-23, "
CHARGING SYSTEM" .
6. Remove starter motor. Refer to SC-10, "
STARTING SYSTEM" .
7. Separate the engine from the transmission assembly. Refer to AT- 2 7 1 , "
TRANSMISSION ASSEMBLY" .
8. Remove each engine mounting insulator and each engine mounting bracket from the engine with power
tool.
INSTALLATION
Note the following, and install in the reverse order of removal.
Do not allow engine mounting insulator to be damage and careful no oil gets on it.
For a location with a positioning pin, insert it securely into hole of mating part.
For a part with a specified installation orientation, refer to component figure in EM-29, "Components (2WD
Models)" .
When installing engine mounting bracket (RH and LH) on cylin-
der block, tighten two upper bolts (shown as “A” in the figure)
first. Then tighten two lower bolts (shown as “B” in the figure).
Make sure all engine mounting insulators are seated properly, then tighten mounting nuts.
Tighten rear engine mounting member bolts in numerical order
as shown in the figure.
KBIA1017E
PBIC2062E
Vehicle front
KBIA3557J