2009 INFINITI QX56 sensor

TIMING CHAINEM-45
< ON-VEHICLE REPAIR >
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Removal and InstallationINFOID:0000000005885887
NOTE:
• To remove 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 t he same as that for removal on the LH bank.
• To install timing chain and associated parts, start with those on the RH bank. The procedure for installing parts on the LH bank is omitted because it is t he same as that for installation on the RH bank.
REMOVAL
1. Remove the engine assembly from the vehicle. Refer to EM-78, "Removal and Installation".
2. Remove the following components and related parts: • Drive belt auto tensioner and idler pulley. Refer to EM-13, "
Removal and Installation".
• Thermostat housing and water hose. Refer to CO-22, "
Removal and Installation".
• Power steering oil pump bracket. Refer to ST-26, "
Removal and Installation".
• Oil pan (lower), (upper) and oil strainer. Refer to EM-33, "
Removal and Installation".
• Rocker cover. Refer to EM-38, "
Removal and Installation".
• Generator and generator bracket. Refer to CHG-20, "
Removal and Installation".
• Water pump. Refer to CO-20, "
Exploded View".
3. Disconnect and remove the camshaft position sensor.
4. Disconnect and remove the intake valve ti ming control position sensor (RH and LH).
5. Disconnect and remove the intake valve timing control solenoid valve (RH and LH).
6. Remove the Intake valve timing control solenoid valve cover (RH) (A) and Intake valve timing control solenoid valve cover
(LH) (B) as follows:
a. Loosen and remove the bolts in reverse order as shown.
b. Cut the liquid gasket and remove the covers using Tool.
CAUTION:
Do not damage mating surfaces.
1. Camshaft sprocket LH bank EXH 2. Camshaft sprocket LH bank INT (VTC)3. Camshaft sprocket RH bank INT
(VTC)
4. Camshaft sprocket RH bank EXH 5. Front cover 6. Intake valve timing control solenoid
valve (RH)
7. Intake valve timing control solenoid valve cover (RH) 8. Intake valve timing control position
sensor (RH) 9. Intake valve timing control position
sensor (LH)
10. Intake valve timing control solenoid valve cover (LH) 11. Camshaft position
sensor (PHASE) 12 Cran kshaft pulley bolt
13. Crankshaft pulley 14. Chain tensioner cover 15. Front oil seal
16. Intake valve timing control solenoid valve (RH) 17. O-ring
18. Timing chain tension guide RH bank
19. Timing chain slack guide (RH) 20. Timing chain RH bank 21. Timing chain LH bank
22. Chain tensioner (RH) 23. Timing chain slack guide LH bank 24. Timing chain tension guide LH bank
25. Chain tensioner (LH) 26. O-ring 27. Bracket
28. Oil pump drive spacer 29. Oil pump assembly 30. Crankshaft sprockets
A. To crankshaft B. To camshaft LH bank EXH C. To camshaft LH bank INT (VTC)
D. To camshaft RH bank INT (VTC) E. To camshaft RH bank EXH F. Apply sealant to mating side
G. Refer to EM-45
Tool number : KV10111100 (J-37228)
AWBIA0815ZZ
Revision: December 20092009 QX56

CAMSHAFTEM-53
< ON-VEHICLE REPAIR >
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CAMSHAFT
Exploded ViewINFOID:0000000005885888
Removal and InstallationINFOID:0000000005885889
NOTE:
Do not remove the engine assembly to perform this procedure.
REMOVAL
1. Remove the power steering fluid reservoir tank bolts and position the power steering fluid reservoir tank
aside.
2. Remove the RH bank and LH bank rocker covers. Refer to EM-38, "
Removal and Installation".
3. Remove the spark plugs. Refer to EM-16, "
Removal and Installation".
4. Remove the drive belt. Refer to EM-13, "
Removal and Installation".
AWBIA0819GB
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 INT9. Camshaft LH bank EXH
10. Camshaft sprocket RH bank EXH 11. Camshaft sprocket RH bank INT (VTC)12. Camshaft sprocket LH bank INT
(VTC)
13. Camshaft sprocket LH bank EXH 14. Camshaft position sensor (PHASE) 15. O-ring
16. Cylinder head LH bank A. Refer to EM-53
Revision: December 20092009 QX56

EM-54
< ON-VEHICLE REPAIR >
CAMSHAFT
5. 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.
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.
6. Disconnect and remove the camshaft position sensor. Refer to EM-44, "
Exploded View".
7. Disconnect and remove the intake valve timing c ontrol position sensor (RH and LH). Refer to EM-44,
"Exploded View".
8. Disconnect and remove the intake valve timing control solenoid valve (RH and LH). Refer to EM-44,
"Exploded View".
9. Remove the intake valve timing control solenoid cover RH bank (A) and intake valve timing control solenoid cover LH bank (B)
as follows:
a. Loosen and remove the bolts in reverse order as shown.
b. Cut the liquid gasket and remove the covers using Tool.
CAUTION:
Do not damage mating surfaces.
10. Paint alignment marks on the RH bank (A) timing chain links (C) and LH bank (B) timing chain links (D) and align with the cam-
shaft sprocket alignment marks (E) and (F).
11. Remove the chain tensioner (LH) 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.
KBIA2476E
KBIA0400J
Tool number : KV10111100 (J-37228)
AWBIA0815ZZ
AWBIA0154ZZ
Revision: December 20092009 QX56

EM-68
< ON-VEHICLE REPAIR >
CYLINDER HEAD
CYLINDER HEAD
Exploded ViewINFOID:0000000005885894
Removal and InstallationINFOID:0000000005885895
REMOVAL
1. Remove the engine assembly from the vehicle. Refer to EM-78, "Removal and Installation".
2. Remove the following components and related parts: • Drive belt auto tensioner and idler pulley. Refer to EM-14, "
Drive Belt Auto Tensioner and Idler Pulley".
• Generator assembly and bracket. Refer to CHG-20, "
Removal and Installation".
• Thermostat housing and hose. Refer to CO-22, "
Removal and Installation".
• Oil pan and oil strainer. Refer to EM-33, "
Removal and Installation".
• Fuel tube and fuel injector assembly. Refer to EM-40, "
Removal and Installation".
• Intake manifold. Refer to EM-26, "
Removal and Installation".
• Rocker cover. Refer to EM-38, "
Removal and Installation".
3. Remove the crankshaft pulley, front cover, oil pump, and timing chain. Refer to EM-45, "
Removal and
Installation".
4. Remove the camshaft sprockets and camshafts. Refer to EM-53, "
Removal and Installation".
5. Remove the cylinder head bolts in reverse of order shown.
6. Remove the cylinder heads.
INSPECTION AFTER REMOVAL
Cylinder Head Bolts Diameter
1. Harness bracket 2. Engine coolant temperature sensor 3. Washer
4. Cylinder head gasket (LH) 5. Cylinder head (RH) 6. Cylinder head bolt
7. Cylinder head gasket (RH) 8. Cylinder head (LH)
KBIA2528E
PBIC0068E
Revision: December 20092009 QX56

ENGINE ASSEMBLYEM-79
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1. Release the fuel pressure. Refer to
EC-487, "Fuel Pressure Check".
2. Drain the engine coolant. Refer to CO-11, "
Changing Engine Coolant".
3. Drain the engine oil. Refer to LU-9, "
Changing Engine Oil".
4. Disconnect the battery negative and positive terminal. Refer to PG-76, "
Removal and Installation".
5. Remove the engine hood. Refer to DLK-230, "
Removal and Installation of Hood Assembly".
6. Remove the cowl extension. Refer to EXT-18, "
Removal and Installation".
7. Remove the air duct and air cleaner case assembly. Refer to EM-25, "
Removal and Installation".
8. Remove the radiator assembly and hoses. Refer to CO-15, "
Removal and Installation".
NOTE:
To prevent possible A/T fluid drain from transmissi on opening, use appropriate cap to close off transmis-
sion opening during operation.
9. Remove the drive belt. Refer to EM-13, "
Removal and Installation".
10. Remove the fan blade. Refer to CO-18, "
Removal and Installation (Crankshaft Driven Type)".
11. Disconnect the engine room harness from the fuse box and set it aside.
12. Disconnect the ECM.
13. Disconnect the engine room harness from the engine side and set it aside.
14. Disconnect the engine harness grounds.
15. Disconnect the power steering reservoir t ank from the engine and move it aside.
16. Disconnect the power steering oil pump from the engine. Move it aside and secure it using suitable wire or rope. Refer to ST-26, "
Removal and Installation"
17. Remove the A/C compressor bolts and set the compressor aside. Refer to HA-31, "Removal and Installa-
tion for Compressor" (ATC).
18. Disconnect the brake booster vacuum hose.
19. Disconnect the EVAP line.
20. Disconnect the fuel hose at the engine side connection. Refer to EM-40, "
Removal and Installation".
21. Disconnect the heater hoses at the cowl, and in stall plugs to avoid leakage of engine coolant.
22. Remove the A/T oil level indicator and indicator tube upper bolts.
23. Remove the front final drive assembly (4WD only). Refer to DLN-215, "
Removal and Installation".
24. Remove the exhaust manifolds. Refer to EM-30, "
Removal and Installation".
25. Install the engine slingers into the left bank cylinder head and right bank cylinder head.
26. Disconnect and remove the crankshaft position sensor (POS). Refer to EM-82, "
Exploded View".
27. Remove the A/T. Refer to TM-214, "
Removal and Installation
(2WD)" or TM-216, "Removal and Installation (4WD)".
NOTE:
To prevent possible A/T fluid drain from transmission opening,
use appropriate cap to close off transmission opening during
operation.
28. Lift using a hoist and secure the engine in position.
29. Remove the engine assembly from the vehicl e, avoid interference 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. Engine slinger torque: 45.0 N·m (4.6 kg-m, 33 ft-lb)
WBIA0715E
Revision: December 20092009 QX56

EM-82
< DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
DISASSEMBLY AND ASSEMBLY
ENGINE UNIT
Exploded ViewINFOID:0000000005885901
1. Knock sensor sub-harness 2. Knock sensor3. Cylinder block
4. Main bearing upper 5. Top ring6. Second ring
7. Oil ring 8. Crankshaft key9. Piston
10. Connecting rod 11. Snap ring12. Piston pin
13. Connecting rod bearing 14. Connecting rod bearing cap 15. Main bearing cap
WBIA0471E
Revision: December 20092009 QX56

ENGINE UNITEM-83
< DISASSEMBLY AND ASSEMBLY >
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Disassembly and AssemblyINFOID:0000000005885902
DISASSEMBLY
NOTE:
Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-
ent type of engine stand, some steps may be different.
1. Remove engine assembly and mount to engine stand. Refer to
EM-78, "
Removal and Installation".
CAUTION:
Before removing the hanging chains, make sure engi ne stand is stable and there is no risk of over-
turning.
2. Drain engine coolant by removing the cylinder block drain plugs “A”, “B”, “C” and “D” as shown.
3. Remove the following components and associated parts (the parts referred to in step 1 are not included here).
• Oil pan (upper and lower) and oil strainer. Refer to EM-33, "
Removal and Installation".
• Crankshaft pulley, front cover and timing chain. Refer to EM-45, "
Removal and Installation".
• Camshaft. Refer to EM-53, "
Removal and Installation".
• Cylinder head. Refer to EM-68, "
Removal and Installation".
4. Remove knock sensor and sub harness. CAUTION:
Carefully handle sensor, avoiding shocks.
5. Check connecting rod side clearance. Refer to EM-90, "
Inspection After Disassembly".
6. Remove piston and connecting rod assembly as follows.
a. Position the crankshaft pin corresponding to the connecting rod to be removed onto bottom dead center.
b. Remove connecting rod cap.
16. Thrust bearing lower 17. Main bearing lower18. Crankshaft
19. Pilot converter 20. Thrust bearing upper21. Side bolt
22. Drive plate 23. Reinforcement plate24. Rear oil seal retainer
25. Rear oil seal 26. Transmission27. O-ring
28. Crankshaft position sensor (POS) 29. Gasket 30. Cylinder block heater
31. Connector cap
WBIA0419E
KBIA2549E
Revision: December 20092009 QX56

EM-90
< DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
16. Install knock sensors.CAUTION:
If knock sensor is dropped, replace it with a new one.
• Make sure that there is no foreign material on the cylinderblock mating surface and the back surface of knock sensor.
• Install it with its connector facing the center of the cylinder
block side.
• Do not tighten knock sensor bolts while holding connector.
• Make sure knock sensor does not interfere with other parts.
• Position the sub-harness as shown before installing intake manifold.
17. Installation of the remaining components is in the reverse order of removal.
18. Remove engine assembly from engine stand.
19. Install drive plate. • Align dowel pin of crankshaft rear end with pin holes of eachpart to install.
• Install drive plate, reinforcement plate and pilot converter (if not installed in step 4) as shown.
• Face the chamfered or rounded edge side to the crankshaft.
Inspection After DisassemblyINFOID:0000000005885903
CRANKSHAFT END PLAY
KBIA2493E
KBIA2549E
KBIA2494E
KBIA2537E
Revision: December 20092009 QX56