INFINITI QX56 2006 Factory Service Manual

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
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Revision: November 2009 2006 QX56
INSTALLATION
NOTE:

The above figure shows the relationship between the mating mark on each timing chain and that of the
corresponding sprocket, with the components installed.

To install the timing chain and associated parts, start with those on the RH bank. The procedure for install-
ing parts on the LH bank is omitted because it is the same as that for installation on the RH bank.
WBIA0699E
1. RH bank Camshaft sprocket (Intake) 2.RH bank Camshaft sprocket
(Exhaust)3. RH bank camshaft dowel pin
4. Timing chain 5. RH bank Timing chain slack guide 6. Primary timing chain tensioner
7. Crankshaft sprocket 8. Crankshaft key9. LH Timing chain tension guide
10. Timing chain 11. LH Camshaft dowel pin 12. LH Camshaft sprocket (Exhaust)
13. LH Camshaft sprocket (Intake) 14. Secondary timing chain tensioner 15. RH bank timing chain tension guide
16. LH timing chain slack guide A. LH bank B. RH bank
C. Alignment mark (Link color: copper) D. Alignment mark (Link color: copper) E. Alignment mark (Identification mark)
F. Alignment mark for LH bank (Notch) G. Alignment mark for LH bank (Link
color: Yellow or Gold)H. Alignment mark for RH bank (Notch)
J. Alignment mark (Link color: copper) K. Alignment mark (Identification mark) L. Alignment mark (Identification mark)
M Alignment mark (Link color: copper) N. Alignment mark (Identification mark)

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.
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Revision: November 2009 2006 QX56
7. Install the oil pump drive spacer as follows:

Install so that the front mark on the front edge of the oil pump
drive spacer faces the front of the engine.

Insert the oil pump drive spacer according to the directions of
the crankshaft key and the two flat surfaces of the oil pump
inner rotor.

If the positional relationship does not allow the insertion,
rotate the oil pump inner rotor to allow the oil pump drive
spacer to be inserted.
8. Install the front oil seal using suitable tool. CAUTION:
Do not scratch or make burrs on the circumference of the
oil seal.
9. Install the chain tensioner cover.

Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants"
.
10. Install the front cover as follows:
a. Install a new O-ring on the cylinder block.
KBIA2490E
PBIC0059E
KBIA2547E
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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
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D : 2.6 - 3.6 mm (0.102 - 0.142 in) dia.
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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

EM-46Revision: November 2009
CAMSHAFT
2006 QX56
CAMSHAFTPFP:13001
Removal and InstallationEBS00RF8
* Refer to GI-46, "Recommended Chemical Products and Sealants" .
REMOVAL
1. Remove the RH bank and LH bank rocker covers. Refer to EM-35, "Removal and Installation" .
2. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica- tion notch (without paint mark) with the timing indicator on the
front cover.
1. Cylinder head (RH bank) 2. Camshaft bracket (No. 2, 3, 4, 5) 3. Valve lifter
4. Camshaft bracket (No. 1) 5. Seal washer6. Camshaft (RH bank EXH)
7. Camshaft (RH bank INT) 8. Camshaft (LH bank INT)9. Camshaft (LH bank EXH)
10. Camshaft sprocket (RH bank EXH) 11. Camshaft sprocket (RH bank INT) 12. Camshaft sprocket (LH bank INT)
13. Camshaft sprocket (LH bank EXH) 14. Camshaft position sensor (PHASE) 15. O-ring
16. Cylinder head (LH bank)
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CAMSHAFTEM-47
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b. At this time, make sure both intake and exhaust cam lobes of
No. 1 cylinder (top front on LH bank) point outside.

If they do not point outside, turn crankshaft pulley once more.
3. Remove the chain case cover RH bank (A) and chain case cover LH bank (B) as follows:
a. Loosen and remove the bolts as shown.
b. Cut the liquid gasket and remove the covers using Tool.
CAUTION:
Do not damage mating surfaces.
4. Paint alignment marks on the RH bank (A) timing chain links (C) LH (B) timing chain links (D) and aligning with the camshaft
sprocket alignment marks (E) and (F).
5. Remove the LH bank timing chain tensioner using the following steps. 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.
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 timing chain tensioner.
KBIA0400J
Tool number : KV10111100 (J-37228)
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KBIA2479E

EM-48Revision: November 2009
CAMSHAFT
2006 QX56
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 RH bank timing chain tensioner cover from the front cover using Tool.
CAUTION:
Do not damage mating surfaces.
7. Remove the RH bank timing chain tensioner using the following steps. 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.
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 RH bank timing chain tensioner (A). NOTE:
If it is difficult to push plunger on RH bank timing chain tensioner
(A), remove the plunger under extended condition.
KBIA2483E
Tool number : KV10111100 (J-37228)
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CAMSHAFTEM-49
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Revision: November 2009 2006 QX56
8. Loosen camshaft sprocket bolts as shown and remove camshaft
sprockets.
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft with timing chain discon-
nected.
9. Remove the RH front cover bolts (A) and LH front cover bolts (B).
10. Remove RH (A) camshaft bracket bolts and LH (C) camshaft bracket bolts in the reverse of order shown to remove camshaft
brackets.

Remove No. 1 camshaft bracket.
NOTE:
The bottom and front surface of bracket will be stuck because
of liquid gasket.

⇐: Engine front

B: Exhaust

D: Intake
11. Remove the camshaft.
12. Remove the valve lifters if necessary.

Correctly identify location where each part is removed from.
Keep parts organized to avoid mixing them up.
KBIA2485E
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