ECU INFINITI FX35 2008 Service Manual

EM-76
< SERVICE INFORMATION >[VQ35DE]
TIMING CHAIN
 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 eas-
ier, 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 totighten mounting bolts.
d. Pull stopper pins out from timing chain tensioners (secondary).
6. Install tension guide.
7. Install timing chain (primary) as follows:
a. Install crankshaft sprocket.  Make sure the mating marks on crankshaft sprocket face thefront of the engine.
b. Install timing chain (primary).
PBIC0891E
KBIA1698J
PBIC2110E
SEM929E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-78
< SERVICE INFORMATION >[VQ35DE]
TIMING CHAIN
Do not overtighten slack guide
mounting bolts. It is normal
for a gap to exist under the bo lt 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 rachet 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, theplunger will be secured under this condition.
NOTE:
Figure shows the example of 1.2 mm (0.047 in) diamet er thin screwdriver being used as the stopper pin.
e. Install timing chain tensioner (primary).  Remove any dirt and foreign materials completely from theback and the mounting surfaces of timing chain tensioner (pri-
mary).
f. Pull out stopper pin after installing, and then release plunger.
10. Make sure again that the mating marks on sprockets and timing chain have not slipped out of alignment.
11. Install new O-rings on rear timing chain case.
12. Install new front oil seal on front timing chain case.  Apply new engine oil to both oil seal lip and dust seal lip.
PBIC2633E
PBIC3568E
PBIC3569E
PBIC2548E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

ENGINE ASSEMBLYEM-113
< SERVICE INFORMATION > [VQ35DE]
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At first, remove the engine and the transmission asse
mbly with front suspension member downward. Then
separate the engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-87, "Fuel Pressure Check".
2. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
3. Disconnect both battery terminals. Refer to SC-4, "
How to Handle Battery".
4. Remove the following parts:  Engine cover: Refer to EM-19, "
Component".
 Front road wheel and tires
 Front and rear engine undercover
 Front cross bar: Refer to FSU-16, "
Removal and Installation".
 Cowl top cover (right): Refer to EI-23, "
Component Parts Location".
 Air duct and air cleaner case assembly: EM-17, "
Component".
5. Discharge refrigerant from A/C circuit. Refer to ATC-120, "
HFC-134a (R-134a) Service Procedure".
6. Remove radiator hoses (upper and lower). Refer to CO-13, "
Component".
Engine Room
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect grounding cable (between vehicle to left bank cylinder head).
3. Disconnect battery positive cable harness at v ehicle side and temporarily fasten it on engine.
4. Disconnect A/C piping from A/C compressor, and tem porarily fasten it on vehicle with a rope. Refer to
ATC-120, "
HFC-134a (R-134a) Service Procedure".
5. Disconnect engine room harness connectors shown in the fig- ure.
6. Disconnect two body ground cables.
7. Disconnect brake booster vacuum hose.
8. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
Component".
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
9. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-27, "
On-Vehicle Inspection and Service".
CAUTION:
When temporarily securing, keep the reservo ir tank upright to avoid a fluid leak.
Passenger Room Side
Follow procedure below to disconnect engine room harne ss 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-38, "
Component
Parts Location" and IP-10, "Component Parts Location".
SBIA0472E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-114
< SERVICE INFORMATION >[VQ35DE]
ENGINE ASSEMBLY
2. Disconnect engine room harness connectors at unit sides TCM,
ECM and other.
3. Disengage intermediate fixing point. Pull out engine r oom 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 vi nyl 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. Remove exhaust front tube and center muffler. Refer to EX-3, "
Checking Exhaust System".
3. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft. Refer to PS-12, "
Removal and Installation".
4. Remove tunnel stay. Refer to RSU-5, "
On-Vehicle Inspection and Service".
5. Remove rear propeller shaft. Refer to PR-7, "
On-Vehicle Inspection".
 After disconnection, plug the openi ng on transmission assembly side.
6. Disengage A/T control rod at contro l device assembly side. Then, temporarily secure it on the transmis-
sion assembly, so that it does not sag. Refer to AT-205, "
Control Device Removal and Installation".
7. Remove rear plate from oil pan (upper). Then remove bolts fixing drive plate to torque converter. Refer to
EM-30, "
Component (2WD Models)" and AT-241, "Removal and Installation (2WD Models)".
8. Remove transmission joint bolts which pierce at oil pan (upper) lower rear side. Refer to AT-241,
"Removal and Installation (2WD Models)".
9. Remove front stabilizer. Refer to FSU-15, "
Removal and Installation".
10. Separate steering outer sockets from steering knuckle. Refer to PS-17, "
Removal and Installation".
11. Separate transverse links from suspension member and vehicle body. Refer to FSU-13, "
Removal and
Installation" .
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 someth ing similar as the supporting
surface, secure a completely stable condition.
2. Remove rear engine mounting member bolts.
3. Remove front suspension member mounting nuts. Refer to FSU-5, "
On-Vehicle Inspection and Service".
4. Carefully lower jack, or raise lift to remove t he engine, the transmission assembly and front suspension
member. When performing work, observe the following caution:
CAUTION:
 Confirm there is no interference with the vehicle.
SBIA0473E
PBIC0804E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

ENGINE ASSEMBLYEM-115
< SERVICE INFORMATION > [VQ35DE]
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 Make sure that all connection
points have been disconnected.
 Keep in mind the center of vehicle gravity cha nges. If necessary, use jack(s) to support the vehi-
cle at rear jacking point(s) to preven t 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).
 To protect rocker cover against damage caused by tilting ofengine 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-27, "
On-Vehicle Inspection and Service".
3. Remove engine mounting insulators (RH and LH) under side nuts with power tool.
4. Lift with hoist and separate the engine and the trans mission 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-19, "
System Description".
6. Remove starter motor. Refer to SC-8, "
System Description".
7. Separate the engine from the transmission assembly. Refer to AT-241, "
Removal and Installation (2WD
Models)".
8. Remove each engine mounting insulator and each engine mounting bracket from the engine with power tool.
9. Remove rear engine mounting member and engine mounting insulator (rear) from the transmission assembly.
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-112, "
Component (2WD
Models)".
Slinger bolts:
: 28.0 N·m (2.9 kg-m, 21 ft-lb)
PBIC2061E
KBIA1017E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-118
< SERVICE INFORMATION >[VQ35DE]
ENGINE ASSEMBLY
At first, remove the engine, the transmission assembly
, the transfer assembly and the front final drive assem-
bly with front suspension member downward. Then separa te the engine, the transmission assembly, the trans-
fer and the front final drive assembly.
Preparation
1. Release fuel pressure. Refer to EC-87, "Fuel Pressure Check".
2. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
3. Disconnect both battery terminals. Refer to SC-4, "
How to Handle Battery".
4. Remove the following parts:  Engine cover: Refer to EM-19, "
Component".
 Front road wheel and tires
 Front and rear engine undercover
 Front cross bar: Refer to FSU-16, "
Removal and Installation".
 Cowl top cover (right): Refer to EI-23, "
Component Parts Location".
 Air duct and air cleaner case assembly: EM-17, "
Component".
5. Discharge refrigerant from A/C circuit. Refer to ATC-120, "
HFC-134a (R-134a) Service Procedure".
6. Remove radiator hoses (upper and lower). Refer to CO-13, "
Component".
Engine Room
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect grounding cable (between vehicle to left bank cylinder head).
3. Disconnect battery positive cable harness at v ehicle side and temporarily fasten it on engine.
4. Disconnect A/C piping from A/C compressor, and tem porarily fasten it on vehicle with a rope. Refer to
ATC-120, "
HFC-134a (R-134a) Service Procedure".
5. Disconnect engine room harness connectors shown in the fig- ure.
6. Disconnect two body ground cables.
7. Disconnect brake booster vacuum hose.
8. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
Component"
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
9. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-27, "
On-Vehicle Inspection and Service".
CAUTION:
When temporarily securing, keep the reservo ir tank upright to avoid a fluid leak.
Passenger Room Side
Follow procedure below to disconnect engine room har ness connectors at passenger room side, and tempo-
rarily secure them on engine.
1. Remove passenger-side kicking plate, das h side finisher, and glove box. Refer to EI-38, "
Component
Parts Location" and IP-10, "Component Parts Location".
SBIA0472E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

ENGINE ASSEMBLYEM-119
< SERVICE INFORMATION > [VQ35DE]
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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 no t to damage harnesses and connectors.
 After temporarily securing, cover connectors with vi nyl or similar material to protect against for-
eign material adhesion.
Vehicle Underbody
1. Remove A/T fluid cooler hoses and pow er steering oil pump oil cooler hoses.
 Install plug to avoid leakage of A/T fluid and power steering fluid.
2. Remove exhaust front tube and center muffler. Refer to EX-3, "
Checking Exhaust System".
3. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to PS-12, "
Removal and Installation".
4. Remove tunnel stay. Refer to RSU-5, "
On-Vehicle Inspection and Service".
5. Remove rear propeller shaft. Refer to PR-7, "
On-Vehicle Inspection".
6. Remove front drive shaft (both side). Refer to FAX-13, "
On-Vehicle Inspection".
7. Disconnect harness connector from transmission assembly and transfer assembly.
8. 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-205, "
Control Device Removal and Installation".
9. Remove rear plate from oil pan (upper). Then remove bolts fixing drive plate to torque converter. Refer to
EM-30, "
Component (2WD Models)" and AT-241, "Removal and Installation (2WD Models)".
10. Remove bolts fixing the transmission assembly to lower rear side of oil pan (upper). Refer to AT-241,
"Removal and Installation (2WD Models)".
11. Remove front stabilizer. Refer to FSU-15
.
12. Separate steering outer sockets from steering knuckle. Refer to PS-17, "
Removal and Installation".
13. Separate transverse links from suspension member and vehicle body. Refer to FSU-13, "
Removal and
Installation".
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 transmission.
CAUTION:
Put a piece of wood or someth ing similar as the supporting
surface, secure a completely stable condition.
2. Remove rear engine mounting member bolts.
3. Remove front suspension member mounting nuts. Refer to FSU-5, "
On-Vehicle Inspection and Service".
4. Carefully lower jack, or raise lift to remove the engi ne, transmission assembly, transfer, front final drive
assembly and front suspension member. When per forming work, observe the following caution:
SBIA0473E
PBIC0804E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-120
< SERVICE INFORMATION >[VQ35DE]
ENGINE ASSEMBLY
CAUTION:
 Confirm there is no interference with the vehicle.
 Make sure that all connection
points have been disconnected.
 Keep in mind the center of the vehicle gravity changes. If necessary, use jack(s) to support the
vehicle at rear jacking point(s) to pr event 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).
 To protect rocker cover against damage caused by tilting ofengine 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-27, "
On-Vehicle Inspection and Service".
3. Remove engine mounting insulators (RH and LH) under side nuts with power tool.
4. Lift with hoist and separate the engine, the transmi ssion assembly, the transfer assembly and the front
final drive assembly from front suspension member.
CAUTION:
 Before and during this lifting, always check if any harnesses are left connected.
 Avoid damage to and oil/grease smearing or spills onto engine mounting insulator.
5. Remove alternator. Refer to SC-19, "
System Description".
6. Remove starter motor. Refer to SC-8
.
7. Remove front propeller shaft from the front final drive assembly side. Refer to PR-4, "
On-Vehicle Inspec-
tion".
8. Separate the engine from the transmission assembly. Refer to AT-241, "
Removal and Installation (2WD
Models)".
9. Remove the front final drive assembly from oil pan (upper). Refer to FFD-14, "
Removal and Installation
(VQ35DE Models)".
10. Remove each engine mounting insulator and each engine mounting bracket from the engine with power
tool.
11. Remove rear engine mounting member and engine m ounting insulator (rear) from the transmission
assembly.
12. Remove dynamic damper from the transfer assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.
 Do not allow engine mounting insulator to be damage and careful no engine 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-117, "
Component (AWD
Models)".
Slinger bolts:
: 28.0 N·m (2.9 kg-m, 21 ft-lb)
PBIC2061E
KBIA1017E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-170
< SERVICE INFORMATION >[VK45DE]
DRIVE BELTS
DRIVE BELTS
ComponentINFOID:0000000001325765
Checking Drive BeltsINFOID:0000000001325766
WARNING:
Be sure to perform when engine is stopped.
 Remove air duct (inlet) when inspecting drive belt for alternator, water pump and A/C compressor.
 Remove front engine undercover with power tool when inspecting power steering oil pump belt.
 Make sure that indicator (single line notch) of eac
h auto tensioner is within the allowable working range
(between three line notches).
NOTE:
 Check auto tensioner indication when engine is cold.
 When new drive belt is installed, the range should be “A”.
 The indicator notch is located on the moving side of auto tensioner for alternator, water pump and A/C
compressor belt, while it is found on the fixed side for power steering oil pump belt.
 Visually check entire belt for wear, damage or cracks.
 If the indicator is out of allowable wo rking range or belt is damaged, replace belt.
Tension AdjustmentINFOID:0000000001325767
Belt tensioning is not necessary, as it is automatically adjusted by auto tensioner.
Removal and InstallationINFOID:0000000001325768
REMOVAL
Alternator, Water Pump and A/C Compressor Belt
1. Remove air duct (inlet). Refer to EM-173, "Component".
2. With box wrench, and while securely holding the hexagonal part in pulley center of auto tensioner, move wrench handle in the
direction of arrow (loosening direction of tensioner).
CAUTION:
 Avoid placing hand in a location where pinching may
occur if the holding tool accidentally comes off.
 Do not loosen the hexagonal part in center of drive belt auto-tensioner pulley (Do not tu rn it clockwise). If turned
clockwise, the complete dri ve belt auto-tensioner must be
replaced as a unit, including the pulley.
PBIC2331E
PBIC2976E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DRIVE BELTSEM-171
< SERVICE INFORMATION > [VK45DE]
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3. Under the above condition, insert a metallic bar of
approximately 6 mm (0.24 in) in diameter (hexagonal
bar wrench shown as example in the figure) through the holding boss to lock auto tensioner pulley arm.
 Leave auto tensioner pulley arm locked until belt is installed again.
4. Remove alternator, water pump and A/C compressor belt.
Power Steering Oil Pump Belt
1. Remove air duct (inlet). Refer to EM-173, "Component".
2. Remove front engine undercover with power tool.
3. Remove alternator, water pump and A/C compressor belt. Refer to "Alternator, Water Pump and A/C Compressor Belt".
4. While securely holding the hexagonal protrusion part of auto tensioner pulley with box wrench, move wrench handle in the
direction of arrow (loosening direction of tensioner).
CAUTION:
Avoid placing hand in a locat ion where pinching may occur
if holding tool accidentally comes off.
5. Under the above condition, insert a metallic bar of approximately 6 mm (0.24 in) in diameter (hexagonal bar wrench shown as
example in the figure) through the holding boss to lock auto ten-
sioner pulley arm.
 Leave auto tensioner pulley arm locked until belt is installed
again.
6. Remove power steering oil pump belt.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Make sure belt is securely installed around all pulleys.
 Make sure belt is correctly engaged with the pulley groove.
 Check for engine oil and engine coolan t are not adhered belt and pulley groove.
 Check that belt tension is within the allowable working range, using indicator notch on auto ten-
sioner. Refer to EM-170, "
Checking Drive Belts".
ComponentINFOID:0000000001325769
CAUTION:
The complete drive belt auto-tensioner must be replaced as a unit, including the pulley.
PBIC1543E
1.Auto tensioner ( Us
ed for alternator,
water pump and A/C compressor) 2. Idler pulley 3. Auto tensioner (Use
d for power steer-
ing oil pump belt)
PBIC2788E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C