ECU INFINITI QX4 2005 Factory Service Manual

OVER FENDER
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OVER FENDERPFP:63810
Removal and InstallationEIS004WI
REMOVAL
1. Remove screws from front and/or rear over fender.
CAUTION:
Never apply tack-paper adhesive remover to body panel surface finished with lacquer-based paints.

Original over fenders are affixed to body panel with double-faced adhesive tape.
2. Heat over fender to between 30° and 40°C (86° to 104°F) with a heat gun.
3. Raise end of over fender and cut away tape, release plastic clips and remove over fender. Remove all
traces of tape.
INSTALLATION

On vehicles coated with Hard Clear Coat, use double-faced 3M adhesive tape Product No, 4210 or equiv-
alent, after priming with 3M primer Product No. N200, C-100 or equivalent.

The repair parts are also affixed with double-faced adhesive tape.

To re-use existing over fender, clean all traces of double-faced tape from the over fender and apply new
double-faced tape to the over fender.
1. Clean the panel surface with isopropyl alcohol or equivalent to degrease the surface.
2. Heat the panel and double-faced tape surface to 30° to 40°C (86° to 104°F).
3. Remove the backing sheet from the tape surface.
4. Align the plastic clips on the back side of the front and/or rear over fender to the mounting grommets.
5. Press ends by hand and use a roller to apply 5 kg-f (11lbs-f) to press over fender surface to body panel.
CAUTION:
To secure contact, do not wash vehicle for 24 hours after installation.
1. Grommet 2. Front over fender 3. Plastic clip
4. Double-faced adhesive tape 5. Spring nut 6. Rear over fender
7. Double-faced adhesive tape
WIIA0268E

EI-22
OVER FENDER
Revision: October 20052005 QX56
6. Secure front and/or rear over fender with screws.

SIDE GUARD MOLDING
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2. Heat the panel and double-faced adhesive tape surface to 30° to 40°C (86° to 104°F).
3. Remove the backing sheet from the double-faced adhesive tape surface.

Align the plastic clips into the holes in the outer door.

Continue aligning the plastic clips into their corresponding holes in the outer door during installation.
4. Press ends by hand and use a roller to apply 5 kg-f (11 lbs-f) to press double-faced adhesive tape surface
on side guard molding to door surface.

Apply even pressure along double-faced adhesive tape surface on side guard molding to insure proper
wet out.
CAUTION:
To secure contact of double-faced adhesive tape, do not wash vehicle for 24 hours after installation.

DRIVE BELTS
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INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys.

Rotate the crankshaft pulley several turns clockwise to equalize belt tension between pulleys.

Make sure belt tension is within the allowable working range, using indicator notch on the auto tensioner.
Refer to EM-12, "
Checking Drive Belts" .
Drive Belt Auto Tensioner and Idler PulleyEBS00LLZ
REMOVAL
1. Remove the air duct and resonator assembly. Refer to EM-14 .
2. Remove the drive belt. Refer to EM-12, "
Checking Drive Belts" .
3. Remove the auto tensioner and idler pulley using power tool.
INSTALLATION
Installation is in the reverse order of removal.
WBIA0607E
1. Auto tensioner 2. Idler pulley

FUEL INJECTOR AND FUEL TUBE
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Handle O-ring with bare hands. Never wear gloves.

Lubricate new 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 tube. Do not angle or twist it.
3. Install the fuel injector to the fuel tube using the following steps.
a. Insert new clip into clip mounting groove on the fuel injector.

Insert clip so that lug “A” of fuel injector matches notch “A” of
the clip.
CAUTION:

Do not reuse clip. Replace it with a new one.

Do not allow the clip to interfere with the O-ring. If
interference occurs, replace the O-ring.
b. Insert the fuel injector into the fuel tube with the clip attached.

Insert it while matching it to the axial center.

Insert fuel injector so that lug “B” of fuel tube matches notch
“B” of the clip.

Make sure that the fuel tube flange is securely fixed in the
flange fixing groove on the clip.
c. Make sure that installation is complete by checking that the fuel
injector does not rotate or come off.

Make sure that the protrusions of the fuel injectors are aligned
with the cutouts of the clips after installation.
4. Install the fuel tube and fuel injector assembly to the intake manifold.
CAUTION:
Do not let the tip of the injector nozzle come in contact with other parts.

Tighten fuel tube assembly bolts “a” to “b” in illustration in two
steps.
5. Install the fuel hose assembly.

Insert connectors straight, making sure that the axis is lined up with fuel tube side to prevent O-ring
from being damaged.

Tighten bolts evenly in several steps.

Make sure that there is no gap between the flange and fuel tube after tightening the bolts.
CAUTION:

Handle O-ring with bare hands. Do not wear gloves.Fuel tube side : Blue
Nozzle side : Brown
KBIA2507E
1st step : 12.8 N·m (1.3 kg-m, 9 ft-lb)
2nd step : 24.5 N·m (2.5 kg-m, 18 ft-lb)
KBIA2474E

TIMING CHAIN
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b. At this time, make sure both intake and exhaust cam lobes of
No. 1 cylinder (top front on left bank) point outside.

If they do not point outside, turn crankshaft pulley once more.
5. Remove the crankshaft pulley.
a. Secure crankshaft using suitable tool, remove crankshaft bolt.
b. Remove the crankshaft pulley from the crankshaft.

Remove the crankshaft pulley using suitable tool. Set the
bolts in the two bolt holes [M6 x 1.0 mm (0.04 in)] on the front
surface.
NOTE:
The dimension between the centers of the two bolt holes is 61
mm (2.40 in).
6. Remove the front cover.
a. Loosen and remove the bolts in the reverse of order shown.
b. Cut the liquid gasket and remove the covers using Tool.
CAUTION:
Do not damage mating surfaces.
7. Remove the front oil seal using suitable tool.
CAUTION:
Do not damage front cover.
8. Remove the oil pump drive spacer.

Hold and remove the flat space of the oil pump drive spacer
by pulling it forward.
KBIA0400J
PBIC0053E
KBIA2477E
Tool number : KV10111100 (J-37228)
KBIA2478E
KBIA2512E

EM-38Revision: October 2005
TIMING CHAIN
2005 QX56
9. Remove the oil pump. Refer to LU-13, "Removal and Installation" .
10. Remove the chain tensioner on the left bank using the following steps.
NOTE:
To remove the timing chain and associated parts, start with those on the left bank. The procedure for
removing parts on the right bank is omitted because it is the same as that for the left bank.
a. Squeeze the return-proof clip ends using suitable tool and push
the plunger into the tensioner body.
b. Secure the plunger using stopper pin.

Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter.
c. Remove the bolts and chain tensioner.
WAR NIN G:
Plunger, spring, and spring seat pop out when (squeezing)
return-proof clip without holding plunger head. It may
cause serious injuries. Always hold plunger head when
removing.
NOTE:

Stop the plunger in the fully extended position by using the
return-proof clip 1 if the stopper pin is removed.

Push the plunger 2 into the tensioner body while squeezing
the return-proof clip 1. Secure it using stopper pin 3.
11. Remove the chain tension guide and slack guide.
12. Remove the timing chain and crankshaft sprocket.
13. Loosen the camshaft sprocket bolts as shown and remove the
camshaft sprocket.
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft when timing chain is discon-
nected.
14. Repeat the same procedure to remove the right timing chain and
associated parts.
INSPECTION AFTER REMOVAL
Check for cracks and any excessive wear at link plates. Replace
chain if necessary.

In the same way as for the left bank, inspect the timing chain
and associated parts on the right bank.
KBIA2479E
KBIA2483E
KBIA2513E
PBIC0282E

EM-44Revision: October 2005
CAMSHAFT
2005 QX56
5. Remove the chain tensioner on the left bank using the following steps.
WAR NIN G:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.
b. Secure plunger using stopper pin.

Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter.
c. Remove the bolts and the chain tensioner.
NOTE:

Stop plunger in the fully extended position using return-proof clip
1 if stopper pin is removed.

Push the plunger 2 into the tensioner body while squeezing the
return-proof clip 1. Secure it using stopper pin 3.
6. Remove the right chain tensioner cover from the front cover
using Tool.
CAUTION:
Do not damage mating surfaces.
7. Remove chain tensioner on right bank using the following steps.
WAR NIN G:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.
b. Secure plunger using stopper pin.

Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter.
KBIA2479E
KBIA2483E
Tool number : KV10111100 (J-37228)
KBIA2521E
KBIA2479E

EM-70Revision: October 2005
ENGINE ASSEMBLY
2005 QX56
5. Remove the cowl extension. Refer to EI-18, "Removal and Installation" .
6. Remove the engine room cover using power tools.
7. Remove the air duct and air cleaner case assembly EM-14, "
REMOVAL" .
8. Disconnect the vacuum hose between the vehicle and engine and set it aside.
9. Remove the radiator assembly and hoses. Refer to CO-12, "
REMOVAL" .
10. Remove the drive belts. Refer to EM-12, "
Removal" .
11. Remove the fan blade. Refer to CO-15, "
REMOVAL" .
12. Disconnect the engine room harness from the fuse box and set it aside.
13. Disconnect the ECM.
14. Disconnect the engine room harness from the engine side and set it aside.
15. Disconnect the engine harness grounds.
16. Disconnect the power steering reservoir tank from the engine and move it aside.
17. Disconnect the power steering oil pump from the engine. Move it aside and secure it using suitable wire or
rope. Refer to PS-26, "
REMOVAL" .
18. Remove the A/C compressor bolts and set the compressor aside. Refer to ATC-179, "
REMOVAL" .
19. Disconnect the brake booster vacuum line.
20. Disconnect the EVAP line.
21. Disconnect the fuel hose at the engine side connection. Refer to EM-29, "
REMOVAL" .
22. Disconnect the heater hoses at cowl, and install plugs to avoid leakage of engine coolant.
23. Remove the A/T oil level indicator and indicator tube upper bolts.
24. Remove the front final drive assembly (4x4 only). Refer to FFD-11, "
REMOVAL" .
25. Remove the exhaust manifolds. Refer to EM-19, "
Removal and Installation" .
26. Install the engine slingers into the left bank cylinder head and
right bank cylinder head.
27. Remove the A/T. Refer to AT-244, "
Removal and Installation
(4x2)" or AT-247, "Removal and Installation (4x4)" .
28. Lift using hoist and secure the engine in position.
29. Remove the engine assembly from the vehicle, avoid interfer-
ence with the vehicle body.
CAUTION:

Before and during lifting, always check if any harnesses
are left connected.
30. Remove the parts that may restrict installation of the engine to the engine stand.
NOTE:
This procedure is described assuming that you use an engine stand mounting to the surface to which the
transmission mounts.
a. Remove the drive plate.

Holding the crankshaft pulley bolt, lock the crankshaft to remove the drive plate bolts.

Loosen the bolts diagonally.
WBIA0464E
Engine slinger torque: 45.0 N·m (4.6 kg-m, 33 ft-lb)
PBIC1556E

EM-82Revision: October 2005
CYLINDER BLOCK
2005 QX56
CAUTION:

Ensure the dowel pin is installed in the crankshaft.

When installing the drive plate to crankshaft, be sure to
correctly align crankshaft side dowel pin and drive plate
side dowel pin hole.

Tighten drive plate bolts crosswise several times.
NOTE:

Install the drive plate and reinforcement plate in the direction
shown.

Secure the drive plate using suitable tool.

Tighten the drive plate bolts crosswise several times.

Unlock drive plate, remove tool.
20. Installation of the remaining components is in the reverse order of removal.
How to Select Piston and Bearing EBS00LMK
DESCRIPTION
*For the service parts, the grade for fitting cannot be selected between a piston pin and a connecting rod.
(Only 0 grade is available.) The information at the shipment from the plant is described as a reference.

The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.

For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.

For details of the measurement method of each part, the reuse standards, and the selection method of the
selective fitting parts, refer to the text.Drive plate bolts : 88.2 N·m (9.0 kg-m, 65 ft-lb)
KBIA2494E
Connecting points Connecting parts Selection items Selection methods
Between cylinder block to
crankshaftMain bearingMain bearing grade (bearing
thickness)Determined by match of cylin-
der block bearing housing
grade (Housing inside diame-
ter) and crankshaft journal
grade (journal outside diame-
ter)
Between crankshaft to connect-
ing rodConnecting rod bearingConnecting rod bearing grade
(bearing thickness)Connecting rod bearing grade
= crankshaft pin grade (pin
diameter). No grade exists for
inside diameter of connecting
rod large end.
Between cylinder block to pis-
tonPiston and piston pin assembly.
The piston is available together
with piston pin as an assembly.Piston grade (piston diameter)Piston grade = cylinder bore
grade (diameter of bore)
*Between piston to connecting
rod———