2006 INFINITI QX56 check oil

INTAKE MANIFOLDEM-19
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Revision: November 2009 2006 QX56
INSTALLATION
Installation is in the reverse order of removal.

Tighten the intake manifold bolts in numerical order as shown.

Install the EVAP canister purge control solenoid valve connector with it facing front of engine.

Tighten the electronic throttle control actuator bolts of the electric throttle control actuator equally and
diagonally in several steps.

After installation perform procedure in EM-20, "INSPECTION AFTER INSTALLATION" .

Install the water hose so that its overlap width for connection is between 27 mm (1.06 in) and 32 mm (1.26
in) (target: 27 mm 1.06 in).
Connecting Quick Connector of Fuel Tube
Install quick connector as follows (the steps are the same for quick connectors on both engine side and vehi-
cle side except for the quick connector cap).
1. Make sure no foreign substances are deposited in and around tube and quick connector, and they are not
damaged.
2. Thinly apply new engine oil around the fuel tube from tip end to the spool end.
3. Align center to insert quick connector straight into fuel tube.

Insert until the paint mark for engagement identification
(white) goes completely inside quick connector so that you
cannot see it from the straight side of the connected part. Use
a mirror to check this where it is not possible to view directly
from the straight side, such as quick connector on vehicle
side.

Insert fuel tube into quick connector until top spool is com-
pletely inside quick connector, and 2nd level spool exposes
right below quick connector on engine side.
CAUTION:

Hold "A" position in illustration when inserting fuel
tube into quick connector.

Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.

Insert until you hear a "click" sound and actually feel
the engagement.

To avoid misidentification of engagement with a similar
sound, be sure to perform the next step.
4. Pull quick connector by hand holding "A" position. Make sure it is completely engaged (connected) so that it does not come out from fuel tube.
NOTE:
Recommended pulling force is 50 N (5.1 kg, 11.2 lb).
KBIA2462E
PBIC0017E
KBIA0272E

EM-22Revision: November 2009
EXHAUST MANIFOLD AND THREE WAY CATALYST
2006 QX56
b. Remove the air fuel ratio A/F sensors from both left and rightexhaust manifolds using Tool.
CAUTION:

Do not damage the air fuel ratio A/F sensors

Discard any air fuel ratio A/F sensor which has been
dropped from a height of more than 0.5m (19.7 in) onto a
hard surface such as a concrete floor. Replace it with a
new one.
8. Support engine using a suitable tool.
9. Remove the exhaust manifold (LH) following the steps below.
a. Remove the engine mounting insulator. Refer to EM-74
.
b. Remove the exhaust manifold cover.
c. Remove the engine mounting bracket. Refer to EM-74
.
d. Loosen the nuts in reverse order as shown using power tool.
e. Remove the exhaust manifold (LH) (A).
10. Remove the exhaust manifold (RH) following the steps below.
a. Remove the engine mounting insulator. Refer to EM-74
.
b. Remove the exhaust manifold cover.
c. Remove the engine mounting bracket. Refer to EM-74
.
d. Remove the oil level gauge guide. Refer to EM-24
.
e. Loosen the nuts in reverse order as shown using power tool.
f. Remove the exhaust manifold (RH) (B).
INSPECTION AFTER REMOVAL
Surface Distortion

Check the flatness of each exhaust manifold flange surface
using suitable tools.

If measurement exceeds the limit, replace the exhaust manifold.
INSTALLATION
Installation is in the reverse order of removal. Tool number : — (J-44626)
WBIA0630E
WBIA0696E
WBIA0696E
Flatness limit : 0.3 mm (0.012 in)
KBIA2504E

OIL PAN AND OIL STRAINEREM-27
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Revision: November 2009 2006 QX56
b. Tighten the oil pan (lower) bolts in numerical order as shown.
4. Install the oil pan drain plug.
5. Install engine assembly. Refer to EM-76, "
INSTALLATION" .

Do not fill the engine oil for at least 30 minutes after oil pan is installed.
INSPECTION AFTER INSTALLATION
1. Check engine oil level and add engine oil if necessary. Refer to LU-7, "OIL LEVEL" .
2. Start the engine, and check for leaks of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check engine oil level again.
PBIC2595E

FUEL INJECTOR AND FUEL TUBEEM-33
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Revision: November 2009 2006 QX56

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 seated 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.

Lubricate O-ring with new engine oil.

Do not clean O-ring with solvent.
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

EM-40Revision: November 2009
TIMING CHAIN
2006 QX56
9. Remove the oil pump. Refer to LU-13, "REMOVAL" .
10. Remove the chain tensioner on the LH bank using the following steps.
NOTE:
To remove the timing chain and associated parts, start with those on the LH bank. The procedure for
removing parts on the RH bank is omitted because it is the same as that for the LH 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. WARNING:
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 timing chain tension guide and timing chain 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 RH 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 LH bank, inspect the timing chain
and associated parts on the RH bank.
KBIA2479E
KBIA2483E
KBIA2513E
PBIC0282E

EM-42Revision: November 2009
TIMING CHAIN
2006 QX56
1. Make sure the crankshaft key and RH bank camshaft dowel pinand LH bank camshaft dowel pin are facing in the direction
shown.
2. Install the camshaft sprockets.

Install the intake camshaft sprocket and exhaust camshaft
sprockets by selectively using the groove of the dowel pin
according to the bank. (Common part used for both banks.)

Lock the hexagonal part of the camshaft in the same way as
for removal, and tighten the bolts.

A = I: Intake

B = E: Exhaust
3. Install the crankshaft sprockets for both banks.

Install LH bank crankshaft sprocket (B) and RH bank crank-
shaft sprocket (C) so that their flange side (A) (the larger
diameter side without teeth) faces in the direction shown.
NOTE:
The same parts are used but facing directions are different.
4. Install the timing chains and associated parts.

Align the alignment mark on each sprocket and the timing chain for installation.
CAUTION:

Before installing timing chain tensioner, it is possible to change the position of alignment
mark on timing chain and each sprocket. After the alignment marks are aligned, keep them
aligned by holding them by hand.

Install the slack guides and tension guides onto the correct side by checking the identification mark on
the surface.

Install the timing chain tensioner with the plunger locked in with the stopper pin.
CAUTION:

Before and after the installation of the timing chain tensioner, make sure that the alignment
mark on the timing chain is not out of alignment.

After installing the timing chain tensioner, remove the stopper pin to release the tensioner.
Make sure the tensioner is released.

To avoid chain-link skipping of the timing chain, do not move crankshaft or camshafts until
the front cover is installed.
5. In the same way as for the RH bank, install the timing chain and associated parts on the LH bank.
6. Install the oil pump.
SBIA0356E
WBIA0700E
WBIA0701E

EM-44Revision: November 2009
TIMING CHAIN
2006 QX56
b. Apply liquid gasket as shown.Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants".
c. Check again that the timing alignment marks on the timing chain and on each sprocket are aligned. Then install the front cover.
d. Install the bolts in the numerical order shown.
e. After tightening, re-tighten to the specified torque. CAUTION:
Be sure to wipe off any excessive liquid gasket leaking onto
surface mating with oil pan.
11. Install the timing chain case cover RH bank (A) and timing chain case cover LH bank (B) as follows:

*: Cross mark (c) that can not be seen after assembly
a. Apply liquid gasket (a) as shown. Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants".
CAUTION:
The start and end of the application of the liquid gasket
should be crossed at a position that cannot be seen after
attaching the chain case cover.
b. Install the bolts in the numerical order shown.
12. Install the crankshaft pulley.

Install the key of the crankshaft.

Insert the pulley by lightly tapping it.
CAUTION:
Do not tap pulley on the side surface where the belt is installed (outer circumference).
13. Tighten the crankshaft pulley bolt.

Lock the crankshaft using suitable tool, then tighten the bolt.

Perform the following steps for angular tightening:
KBIA2517E
M6 × 50 mm (1.97 in) : No. 1, 20, 25, 26, 27
M6 × 80 mm (3.15 in) : No. 4, 5, 7
M6 × 20 mm (0.79 in) : Except the above
KBIA2478E
D : 2.6 - 3.6 mm (0.102 - 0.142 in) dia.
WBIA0702E
WBIA0703E

TIMING CHAINEM-45
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Revision: November 2009 2006 QX56
a. Apply engine oil onto the threaded parts of the bolt and seating area.
b. Select the one most visible notch of the four on the bolt flange.
Corresponding to the selected notch, put a alignment mark
(such as paint) on the crankshaft pulley.
14. Rotate the crankshaft pulley in normal direction (clockwise when viewed from engine front) to check for parts interference.
15. Installation of the remaining components is in the reverse of order of removal.Crankshaft pulley bolt torque
Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90
° (angle tightening)
KBIA2519E