INFINITI QX56 2011 Factory Service Manual

OIL PAN (UPPER)EM-59
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a. Use a scraper (A) to remove old liquid gasket from mating sur-
faces.
 Also remove the old liquid gasket from mating surface of cylin-der block.
 Remove old liquid gasket from the bolt holes and threads.
CAUTION:
Never scratch or damage th e mating surfaces when clean-
ing off old liquid gasket.
b. Install new O-rings on the bottom of cylinder block and oil pump.
c. Apply a continuous bead of liquid gasket with tube pre sser (commercial service tool) to the cylinder block
mating surfaces of oil pan (upper) to a limited portion as shown in the figure.
Use Genuine RTV silicone sealant or equivalent. Refer to GI-22, "
Recommended Chemical Prod-
ucts and Sealants".
CAUTION:
Attaching must be done with in 5 minutes after coating.
d. Tighten mounting bolts in numerical order as shown in the fig- ure.
CAUTION:
Install avoiding misal ignment of O-rings.
NOTE:
Tighten mounting bolts No. 1 and 2 in two steps. The numerical
order No. 9 and 16 shown second steps.
 There are four types of mounting bolts. Refer to the following for locating bolts.
e. Tighten transmission joint bolts.
f. Install rear plate cover.
2. Install oil strainer.
JPBIA3503ZZ
a. : 5.5 - 7.5 mm (0.217 - 0.295 in) b. : φ4.0 - 5.0 mm (0.157 - 0.197 in)
: Engine front
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: Engine front
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Order number for tightening 17, 18 2 (16), 3, 5, 6, 7, 8, 10,
11, 14, 15 1(9), 4 12, 13
Bolt size M6 M8
Bolt length 45 mm (1.77 in) 25 mm (0.98 in) 30.0 mm (1.18 in) 120 mm (4.72 in)
Tightening torque 9.0 N· (0.92 kg-m, 80
in-lb) 22.0 N·m (2.2 kg-m, 16 ft-lb)
Revision: 2010 May2011 QX56

EM-60
< REMOVAL AND INSTALLATION >
OIL PAN (UPPER)
3. Install oil pan (lower). Refer to EM-55, "Removal and Installation".
4. Install in the reverse order of removal. NOTE:
At least 30 minutes after oil pan is installed, pour engine oil.
InspectionINFOID:0000000006289564
INSPECTION AFTER DISASSEMBLY
Clean oil strainer if any object is attached.
INSPECTION AFTER ASSEMBLY
1. Check the engine oil level and adjust engine oil. Refer to LU-9, "Inspection".
2. Start engine, and check there is no leakage of engine oil.
3. Stop engine and wait for 15 minutes.
4. Check the engine oil level again. Refer to LU-9, "
Inspection".
Revision: 2010 May2011 QX56

TIMING CHAINEM-61
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TIMING CHAIN
Exploded ViewINFOID:0000000006289565
1. O-ring 2. O-ring 3. O-ring
4. Tension guide (bank 2) 5. High pressure fuel pump camshaft 6. Timing chain (bank 2)
7. Lifter 8. Intake camshaft sprocket (bank 2) 9. Exhaust camshaft sprocket (bank 2)
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EM-62
< REMOVAL AND INSTALLATION >
TIMING CHAIN
Removal and Installation
INFOID:0000000006289566
REMOVAL
1. Release fuel pressure. Refer to EC-153, "Work Procedure".
2. Drain engine coolant from radiator. Refer to CO-8, "
Draining".
3. Remove fan shroud (lower). Refer to CO-13, "
Exploded View".
4. Remove fan bracket. Refer to CO-16, "
Exploded View".
5. Remove drive belt auto-tensioner. Refer to EM-26, "
Exploded View".
6. Remove oil level gauge and oil level gauge guide. Refer to EM-57, "
Exploded View".
7. Move power steering oil pump to the posit ion without the hindrance for work. Refer to ST-48, "
Exploded
View".
8. Remove alternator, alternator bracket and alternator stay. Refer to CHG-25, "
Exploded View".
9. Move power steering reservoir tank to the position without the hindrance for work, and then remove Res- ervoir tank bracket. Refer to ST-54, "
Exploded View".
10. Remove camshaft position sensors.
CAUTION:
 Handle carefully to avoid dropping and shocks.
 Never disassemble.
 Never allow metal powder to adhere to magnetic part atsensor tip.
 Never place sensors in a lo cation where they are exposed
to magnetism.
11. Remove high pressure fuel pump and lifter. Refer to EM-43, "
Exploded View".
CAUTION:
After removing lifter, replace lifter with a new one.
12. Remove radiator hose (upper) and radiator hose (lower). Refer to CO-13, "
Exploded View".
13. Remove water suction pipe. Refer to CO-20, "
Exploded View".
14. Remove valve timing control cover as per the following:
a. Disconnect valve timing control solenoid valve harness connector.
10. Slack guide (bank 2) 11. Timing chain tensioner (bank 2) 12. Exhaust camshaft sprocket (bank 1)
13. Timing chain (bank 1) 14. Intake camshaft sprocket (bank 1) 15. Timing chain tensioner (bank 1)
16. Slack guide (bank 1) 17. Tension guide (bank 1) 18. Oil pump
19. Camshaft position sensor (bank 2) 20. O-ring 21. Seal ring
22. Valve timing control cover (bank 2) 23. Intake valve timing control solenoid
valve (bank 2)24. Crankshaft pulley
25. Front oil seal 26. Intake valve timing control solenoid
valve (bank 1)27. Valve timing control cover (bank 1)
28. Timing chain tensioner cover 29. Front cover 30. O-ring
31. Camshaft position sensor (bank 1) 32. Camshaft bracket 33. Oil filter (for valve timing control so-
lenoid valve)
34. Crankshaft sprocket 35. Oil pump drive spacer
A. Comply with the installation proce-
dure when tightening. Refer to
EM-
62, "Removal and Installation".
Refer to GI-4, "
Components" for symbol marks in the figure.
A : Keep free from magnetic materials
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Revision: 2010 May2011 QX56

TIMING CHAINEM-63
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b. Loosen mounting bolts in the reverse order as shown in the fig-
ure.
CAUTION:
 Exercise care not to damage mating surfaces.
 Shaft is internally jointed with camshaft sprocket center
hole. When removing, keep it horizontal until it is com-
pletely disconnected.
15. Remove intake valve timing control solenoid valve (bank 1 and bank 2), if necessary. CAUTION:
Valve timing control solenoid valve is no t reusable. Never remove it unless required.
16. Remove O-rings (1) from front cover.
17. Remove rocker cover. Refer to EM-33, "
Exploded View".
18. Obtain No. 1 cylinder at TDC of its compression stroke. Refer to EM-12, "
Inspection".
19. Remove crankshaft pulley. Refer to EM-96, "
FRONT OIL SEAL : Removal and Installation".
20. Remove water pump pulley. Refer to CO-18, "
Exploded View".
21. Remove oil pan (lower) and oil strainer. Refer to EM-54, "
Exploded View".
22. Remove oil pan (upper). Refer to EM-57, "
Exploded View".
23. Remove front cover as per the following:
a. Loosen mounting bolts (A), and then remove camshaft bracket (1).
b. Loosen mounting bolts in reverse order as shown in the figure.
c. Insert a suitable tool into the notch at front cover.  Pry off case by moving a suitable tool.
CAUTION:
 Exercise care not to damage mating surfaces.
 After removal, handle front cover carefully so it does not
tilt, cant, or warp under a load.
A: Bank 2
B: Bank 1
C : Dowel pin hole
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Revision: 2010 May2011 QX56

EM-64
< REMOVAL AND INSTALLATION >
TIMING CHAIN
24. Remove oil pump and oil pump drive spacer.
25. Remove front oil seal from front cover using suitable tool. Use screwdriver for removal.
CAUTION:
Be careful not to damage front cover.
26. Remove O-rings (1), (2), (3) from cylinder heads and cylinder block.
27. Remove oil filter (for valve timing control solenoid valve), if necessary.
28. Remove timing chain tensioner cover from front cover, if necessary.  Use seal cutter [SST: KV10111100 (J-37228)] to cut liquid gasket for removal.
29. Remove timing chain tensioner (bank 1) as per the following: NOTE:
To remove timing chain and related parts, start with those on bank 1. The procedure for removing parts on
bank 2 is omitted because it is the same as that for bank 1.
a. Push both sides of spring (A) against spring tension, and then press in plunger with a slack guide (2).
b. Insert a stopper pin (A) into the body hole, and then fix it with the
plunger pushed in.
30. Remove high pressure fuel pump camshaft.
31. Remove tension guide and slack guide.
32. Remove exhaust camshaft sprocket as per the following:  Secure the hexagonal portion of exhaust camshaf t using a wrench to loosen mounting bolt.
33. Remove timing chain and crankshaft sprocket. CAUTION:
After removing timing chain, never turn cranksh aft and camshaft separately, or valves will strike
the piston head.
34. Remove intake camshaft sprocket as per the following:
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1 : Timing chain tensioner (bank 1)
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Revision: 2010 May2011 QX56

TIMING CHAINEM-65
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 Secure the hexagonal portion (located in between journal No.1
and journal No. 2) of drive shaft (A) using a wrench (B) to
loosen mounting bolt.
NOTE:
The figure shows an example of bank 2.
CAUTION:
 Never loosen the mounting bolt by securing anyt hing other than the camshaft (drive shaft) hexago-
nal portion or with tensioning the timing chain.
 When holding the hexagonal part of camshaft (drive shaft) with a wrench, be careful not to allow the
wrench to cause interference with other parts.
 Never disassemble camshaft sprocket. [Never loosen bolts (B) as shown in the figure.]
35. Use scraper to remove all traces of old liquid gasket from front cover and opposite mating surfaces.  Remove old liquid gasket from bolt hole and thread.
INSTALLATION
: Engine front
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A: Intake
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A : Remove old liquid gasket that is stuck
B : Bolt hole
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EM-66
< REMOVAL AND INSTALLATION >
TIMING CHAIN
NOTE:
 The above figure shows the relationship between the matching mark on each timing chain and that on the
corresponding sprocket, with the components installed.
 Parts with an identification mark (R or L) should be installed on the corresponding bank according to the
mark.
- Intake camshaft sprocket, exhaust camshaft sprocket
- Tension guide
- Slack guide
 To install timing chain and related parts, start with those on bank 2. The procedure for installing parts on
bank 1 is omitted because it is the same as that for installation on bank 2.
1. High pressure fuel pump camshaft 2. Intake camshaft sprocket (bank 2) 3. Exhaust camshaft sprocket (bank 2)
4. Timing chain (bank 2) 5. Slack guide (bank 2) 6. Chain oil jet (bank 2)
7. Timing chain tensioner (bank 2) 8. Crankshaft sprocket (bank 2 side) 9. Crankshaft sprocket (bank 1 side)
10. Chain oil jet (bank 1) 11. Tension guide (bank 1) 12. Timing chain (bank 1)
13. Exhaust camshaft sprocket (bank 1) 14. Intake camshaft sprocket (bank 1) 15. Timing chain tensioner (bank 1)
16. Slack guide (bank 1) 17. Tension guide (bank 2) 18. Dowel pin
A: Matching mark (copper link) B: Matching mark (punched) C: Matching mark (outer groove)
D: Matching mark (white link) E. Matching mark (notched) F. Matching mark (yellow link)
G. Crankshaft key
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Revision: 2010 May2011 QX56

TIMING CHAINEM-67
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1. Check that crankshaft key (1) and dowel pin (A) of each cam-
shaft are located as shown in the figure.
NOTE:
Though camshaft does not stop at the position as shown in the
figure, for the placement of cam nose, it is generally accepted
camshaft is placed for the same direction of the figure.
2. Install camshaft sprockets (INT and EXH).  Install onto correct side by checking with identification mark(A) on surface.
Exhaust side: Secure the hexagonal portion of exhaust camshaft using a wrench to tighten mounting bolt. Refer toEM-74, "
Exploded View".
Intake side:
 Secure the hexagonal portion (located in between journal No.1and journal No. 2) of drive shaft (A) using a wrench (B) to
tighten mounting bolt. Refer to EM-74, "
Exploded View".
NOTE:
The figure shows an example of bank 2.
3. Install high pressure fuel pump camshaft.
4. Install timing chains as per the following:
a. Install crankshaft sprockets for both banks.  Install each crankshaft sprocket so that its flange side (thelarger diameter side without teeth) (A) faces in the direction
shown in the figure.
NOTE:
The same parts are used but facing directions are different.Camshaft dowel pin
: At cylinder head upper face side in each bank
Crankshaft key : Straight up
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JPBIA2110ZZ
: Engine front
JPBIA2302ZZ
1 : Crankshaft sprocket (bank 1 side)
2 : Crankshaft sprocket (bank 2 side)
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Revision: 2010 May2011 QX56

EM-68
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TIMING CHAIN
b. Install timing chains.
Bank 2 (F): Install timing chain so that the matching mark (punched) (B)and the matching mark (outer groove) (C) on camshaft
sprocket is aligned with the copper link (A) on timing chain,
while the matching mark (punched) (B) on crankshaft sprocket
is aligned with the yellow link (D) one on timing chain, as
shown in the figure.
Bank 1 (G): Install timing chain so that the matching mark (punched) (B)and the matching mark (outer groove) (C) on camshaft
sprocket is aligned with the copper link (A) on timing chain,
while the matching mark (notched) (E) on crankshaft sprocket
is aligned with the yellow link (D) one on timing chain, as
shown in the figure.
5. Install slack guides and tension guides onto correct side by checking with identification mark (A) on surface.
CAUTION:
Never overtighten slack guide mounting bolt (2). It is nor-
mal for a gap (A) to exist und er the bolt seats when mount-
ing bolt are tightened to the specification.
6. Install timing chain tensioner as per the following:
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1 : Slack guide (bank 2)
2 : Tension guide (bank 2)
3 : Slack guide (bank 1)
4 : Tension guide (bank 1)
JPBIA3509ZZ
1 : Slack guide
3 : Cylinder block
JPBIA0117ZZ
Revision: 2010 May2011 QX56