lock INFINITI QX56 2011 Factory Service Manual

EM-58
< REMOVAL AND INSTALLATION >
OIL PAN (UPPER)
Removal and Installation
INFOID:0000000006289563
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain engine oil when engine is hot.
1. Remove oil filter. Refer to LU-9, "
Removal and Installation".
2. Remove oil cooler. Refer to LU-11, "
Exploded View".
3. Move A/C compressor to the position without the hindrance for work. Refer to HA-30, "
Exploded View".
4. Remove oil level gauge and oil level gauge guide.
5. Remove oil pressure switch and oil temperature sensor if necessary.
6. Remove rear plate cover.
7. Remove protector A and protector B. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded View".
8. Remove front suspension rear cross member. Refer to TM-205, "
2WD : Exploded View" (2WD models) or
TM-208, "
4WD : Exploded View" (4WD models).
9. Remove steering gear assembly. Refer to ST-41, "
Exploded View".
10. Remove front final drive assembly. Refer to DLN-162, "
Exploded View".
11. Remove oil pan (lower). Refer to EM-54, "
Exploded View".
12. Remove oil strainer. Refer to EM-54, "
Exploded View".
13. Remove bolts fixing oil pan (upper) to transmission assembly.
14. Remove oil pan (upper) as per the following:
a. Loosen mounting bolts in the reverse order as shown in the fig- ure with power tool to remove.
NOTE:
Disregard No. 9, 16 when loosening.
b. Insert a suitable tool into the notch at oil pan (upper) (1) as shown.
 Pry off case by moving a suitable tool.
CAUTION:
Be careful not to damage the mating surfaces.
15. Remove O-ring from bottom of cylinder block and oil pump.
16. Remove oil pressure switch and oil temperature sensor, if necessary.
INSTALLATION
1. Install oil pan (upper) as per the following:
: Engine front
JPBIA3502ZZ
: Engine front
JPBIA2299ZZ
Revision: 2010 May2011 QX56

OIL PAN (UPPER)EM-59
< REMOVAL AND INSTALLATION >
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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
JPBIA3504ZZ
: Engine front
JPBIA3502ZZ
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-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:
JPBIA3473ZZ
1 : Timing chain tensioner (bank 1)
JPBIA2369ZZ
JPBIA2370ZZ
Revision: 2010 May2011 QX56

EM-68
< REMOVAL AND INSTALLATION >
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:
JPBIA3508ZZ
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

TIMING CHAINEM-69
< REMOVAL AND INSTALLATION >
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a. Fix the plunger at the most compressed position using a stopper
pin (A).
 Remove any dirt and foreign materials completely from theback and the mounting surfaces of timing chain tensioner.
b. Pull out stopper pin after installing, and then release plunger.
7. Check again that the matching marks on sprockets and timing chain have not slipped out of alignment.
8. Install oil pump and oil pump drive spacer. Refer to LU-13, "
Exploded View".
9. Install front oil seal on front cover. Refer to EM-96, "
FRONT OIL SEAL : Removal and Installation".
10. Install timing chain tensioner cover (2) to front cover (1).
 Apply a continuous bead of liquid gasket with tube presser(commercial service tool) to front cover as shown in the figure.
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
11. Install oil filter (for valve timing control solenoid valve) (1) in the direction shown in the figure, if removed.
 Check that the oil filter does not protrude from the upper sur-
face of front cover (2) after installation.
12. Install front cover as per the following:
a. Install new O-ring (1), (2), (3) onto cylinder heads and cylinder block.
JPBIA2370ZZ
a: φ3.4 - 4.4 mm (0.134 - 0.173 in)
JPBIA2113ZZ
PBIC3260J
JPBIA3473ZZ
Revision: 2010 May2011 QX56

EM-70
< REMOVAL AND INSTALLATION >
TIMING CHAIN
b. Apply a continuous bead of liquid gasket with tube presser(commercial service tool) to front cover as shown in the figure.
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
c. Check again that the matching marks on timing chain and that on each sprocket are aligned. Then, install front cover.
CAUTION:
Be careful not to damage front oil seal by interference with
front end of crankshaft.
d. Tighten mounting bolts in numerical order as shown in the fig- ure.
 There are three types of mounting bolts.
e. After all mounting bolts are tightened, retighten t hem in numerical order as shown in the figure.
CAUTION:
Be sure to wipe out any excessive liquid gasket leaking onto surface mating with oil pan.
13. Install valve timing control cover as per the following:
A : Junction between cylinder block and cylinder head
B : Protrusion
c : 4.3 - 5.3 mm (0.169 - 0.209 in)
d: φ3.4 - 4.4 mm (0.134 - 0.173 in)
e: φ4.0 - 5.6 mm (0.157 - 0.220 in)
f: φ4.8 - 5.8 mm (0.189 - 0.228 in)
JPBIA3510ZZ
JPBIA3478ZZ
A : 0.79 in (0.79 in)
B : 1.77 in (1.77 in)
C : 3.15 in (3.15 in)
JPBIA3474ZZ
Revision: 2010 May2011 QX56

EM-72
< REMOVAL AND INSTALLATION >
TIMING CHAIN
d. Being careful not to move seal ring from the installation groove,align dowel pins on front cover with dowel pin holes (C) to install
valve timing control covers.
e. Tighten mounting bolts in numerical order as shown in the fig- ure.
14. Install camshaft position sensor and valve timing c ontrol solenoid valve (RH and LH) to valve timing con-
trol cover, if removed.
 Be sure to tighten mounting bolts with flanges completely seated.
15. Install oil pan (upper). Refer to EM-57, "
Exploded View".
16. Install oil pan (lower) and oil strainer. Refer to EM-54, "
Exploded View".
17. Install water pump pulley. Refer to CO-18, "
Exploded View".
18. Install crankshaft pulley.  Fix the crankshaft as instructed in the removal procedure. Refer to EM-96, "
FRONT OIL SEAL :
Removal and Installation".
a. Install crankshaft pulley, taking care not to damage front oil seal.
b. Apply engine oil onto threaded parts of crankshaft pulley bolt and seating area.  Lightly tapping its center with plastic hammer, insert crankshaft pulley.
CAUTION:
Never tap crankshaft pulley on the side surface wh ere belt is installed (outer circumference).
c. Tighten crankshaft pulley bolt.
d. Put a paint mark (A) on crankshaft pulley (1) aligning with angle mark (B) on crankshaft pulley bolt.
e. Tighten crankshaft pulley bolt (clockwise).
 Check the tightening angle by referencing to the notches. Theangle between two notches is 90 degrees.
19. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns smoothly.
20. Install in the reverse order of removal.
InspectionINFOID:0000000006289567
INSPECTION AFTER DISASSEMBLY
Timing Chain
A: Bank 2
B: Bank 1
JPBIA3476ZZ
: 205 N·m (21 kg-m, 151 ft-lb)
Angle tightening: 90 degrees (c)
JPBIA2066ZZ
Revision: 2010 May2011 QX56

CAMSHAFTEM-79
< REMOVAL AND INSTALLATION >
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1. Put V-block on precise flat table, and support No. 2 and 5 jour-
nals of camshaft.
CAUTION:
Never support No. 1 journal (on the side of camshaft
sprocket) because it has a different diameter from the other
four locations.
2. Set a dial indicator vertically to No. 3 journal.
3. Turn exhaust camshaft to one direction with hands, and mea- sure the camshaft runout on a dial indicator. (Total indicator
reading)
4. If it exceeds the limit, replace exhaust camshaft.
Exhaust Camshaft Cam Height
 Measure the exhaust camshaft cam height with a micrometer.
 If wear exceeds the limit, replace exhaust camshaft.
Exhaust Camshaft Journal Oil Clearance
EXHAUST CAMSHAFT JOURNAL DIAMETER
 Measure the outer diameter of exhaust camshaft journal with a micrometer (A).
VVEL LADDER ASSEMBLY (EXH SIDE) INNER DIAMETER Tighten VVEL ladder assembly bolts to the specifi ed torque. Refer to “ASSEMBLY” for the tightening proce-
dure.
 Measure inner diameter (A) of VVEL ladder assembly (exhaust side) with a bore gauge.
EXHAUST CAMSHAFT JOURNAL OIL CLEARANCE
Standard and limit
: Refer to EM-133, "
Camshaft".
PBIC0929E
Standard and limit
: Refer to EM-133, "
Camshaft".
EMQ0072D
Standard : Refer to EM-133, "Camshaft".
JPBIA0122ZZ
Standard : Refer to EM-133, "Camshaft".
PBIC1645E
Revision: 2010 May2011 QX56

EM-80
< REMOVAL AND INSTALLATION >
CAMSHAFT
 (Oil clearance) = [VVEL ladder assembly (exhaust side) inner diameter] – [Exhaust camshaft journal diame-
ter].
 If the calculated value exceeds the limit, replace either or both exhaust camshaft and VVEL ladder assembly
& cylinder head assembly.
NOTE:
VVEL ladder assembly cannot be replaced as a singl e part, because it is machined together with cylinder
head assembly.
Exhaust Camshaft End Play
 Install a dial indicator in thrust direction on front end of camshaft. Measure the end play of a dial indicator when exhaust camshaft is
moved forward/backward (in direction of axis).
 Measure the following parts if out of the limit.
- Dimension “A” for exhaust camshaft No. 1 journal
- Dimension “B” for cylinder head No. 1 journal bearing
 Refer to the standards above, and then replace exhaust camshaft
and/or VVEL ladder assembly & cylinder head assembly.
NOTE:
Cylinder head assembly cannot be replaced as a single part,
because it is machined together with VVEL ladder assembly.
Exhaust Camshaft Sprocket Runout
1. Put V-block on precise flat table, and support No. 2 and 5 journals of exhaust camshaft.
CAUTION:
Never support No. 1 journal (on the side of cam shaft sprocket) because it has a different diameter
from the other four locations.
2. Measure the exhaust camshaft sprocket runout with a dial indi- cator. (Total indicator reading)
3. If it exceeds the limit, replace exhaust camshaft sprocket.
Valve Lifter (EXH)
Standard and limit : Refer to EM-133, "Camshaft".
Standard and limit : Refer to EM-133, "
Camshaft".
SEM864E
Standard : 30.500 - 30.548 mm (1.2008 - 1.2027 in)
Standard : 30.360 - 30.385 mm (1.1953 - 1.1963 in)
JPBIA3516ZZ
Limit : Refer to EM-133, "Camshaft".
PBIC0930E
Revision: 2010 May2011 QX56

EM-82
< REMOVAL AND INSTALLATION >
CAMSHAFT
 Install a dial indicator in thrust direction on front end of drive shaft.Measure the end play of a dial indicator when drive shaft is moved
forward/backward (in direction of axis).
 Measure the following parts if out of the limit.
- Dimension “A” for drive shaft No. 1 journal
- Dimension “B” for cylinder head No. 1 journal bearing
 If it exceeds the limit, replace VVEL ladder assembly & cylinder head assembly.
NOTE:
Cylinder head assembly cannot be replaced as a single part, because it is machined together with VVEL lad-
der assembly.
Camshaft Sprocket (INT) Runout
1. Put V-block on precise flat table, and support No. 2 and 5 journals of drive shaft. CAUTION:
Never support No. 1 journal (on the side of cam shaft sprocket) because it has a different diameter
from the other four locations.
2. Measure the camshaft sprocket (INT) runout with a dial indicator. (Total indicator reading)
3. If it exceeds the limit, r eplace camshaft sprocket (INT).
Valve Lifter (INT)
 Check if surface of valve li fter has any wear or crack.
 If wear or crack is found, replace VVEL ladder assembly & cylinder
head assembly. Refer to EM-133, "
Camshaft".
NOTE:
Since the valve lifter (INT) cannot be replaced by the piece, VVEL
ladder assembly & cylinder head assembly replacement are
required.
Valve Lifter Clearance (INT)
VALVE LIFTER OUTER DIAMETER
: Engine front
Standard and limit : Refer to EM-133, "Camshaft".
JPBIA3517ZZ
: Engine front
Standard : 30.500 - 30.548 mm (1.2008 - 1.2027 in)
Standard : 30.360 - 30.385 mm (1.1953 - 1.1963 in)
JPBIA3516ZZ
Limit : Refer to EM-133, "Camshaft".
KBIA0182E
Revision: 2010 May2011 QX56