coolant INFINITI QX56 2010 Factory Manual Online

EM-26
< ON-VEHICLE REPAIR >
INTAKE MANIFOLD
INTAKE MANIFOLD
Exploded ViewINFOID:0000000005148987
Removal and InstallationINFOID:0000000005148988
REMOVAL
1. Partially drain the engine coolant. Refer to CO-11, "Changing Engine Coolant".
WARNING:
To avoid the danger of being scal ded, never drain the engine coolant when the engine is hot.
2. Remove the engine room cover using power tool. Refer to EM-24, "
Removal and Installation".
3. Release the fuel pressure. Refer to EC-489, "
Fuel Pressure Check".
4. Disconnect the negative battery terminal. Refer to PG-74, "
Removal and Installation".
5. Remove the air duct and resonator assembly. Refer to EM-25, "
Removal and Installation".
1. Intake manifold2. PCV hose 3. Gasket
4. Electric throttle control actuator 5. Water hose 6. Water hose
7. PCV hose 8. EVAP hose 9. EVAP canister purge control solenoid
valve
10. Bracket 11. Gasket
KBIA2461E
Revision: April 20092010 QX56

INTAKE MANIFOLDEM-29
< ON-VEHICLE REPAIR >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
• 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 tubeinto 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).
5. Install the quick connector cap on the quick connector joint (on engine side only).
6. Install the fuel hose and tube to hose clamps.
7. Refill the engine coolant. Refer to CO-11, "
Changing Engine
Coolant".
INSPECTION AFTER INSTALLATION
• After installing fuel tubes, make sure there is no fuel leakage at connections in the following steps.
- Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel leaks at connections.
- Start the engine and rev it up and check for fuel leaks at the connections.
• Perform procedures for “Throttle Valve Closed Position Learning” after finishing repairs. Refer to EC-18,
"Throttle Valve Closed Position Learning".
• If electric throttle control actuator is replaced, per form procedures for “Idle Air Volume Learning” after finish-
ing repairs. Refer to EC-18, "
Idle Air Volume Learning".
KBIA0272E
SBIA0354E
Revision: April 20092010 QX56

EM-52
< ON-VEHICLE REPAIR >
TIMING CHAIN
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.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels in cluding engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-13, "
Fluids and Lubricants".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel leakage at the connection points.
• Start engine. With engine speed increased, che ck again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration. NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:
*Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Crankshaft pulley bolt torque
Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90 ° (angle tightening)
KBIA2519E
Item Before starting engine Engine runningAfter engine stopped
Engine coolant LevelLeakage Level
Engine oil LevelLeakage Level
Other oils and fluids* LevelLeakage Level
Fuel LeakageLeakageLeakage
Exhaust gas —Leakage —
Revision: April 20092010 QX56

EM-68
< ON-VEHICLE REPAIR >
CYLINDER HEAD
CYLINDER HEAD
Exploded ViewINFOID:0000000005149007
Removal and InstallationINFOID:0000000005149008
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 drive belts and idler pulley. Refer to EM-14, "
Drive Belt Auto Tensioner and
Idler Pulley".
• 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: April 20092010 QX56

CYLINDER HEADEM-69
< ON-VEHICLE REPAIR >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
• Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between d1 and d2 exceeds
the limit, replace the bolt with a new one.
• If reduction of diameter appears in a position other than d2, use it as d2 point.
INSTALLATION
1. Install a new cylinder head gasket.
2. Install the cylinder head. Follow the steps below to tighten the bolts in the numerical order shown.
CAUTION:
• If cylinder head bolts are re-used, check their diameters
before installation. Refer to "Cylinder Head Bolts Diame-
ter".
a. Apply engine oil to threads and seating surface of the bolts.
b. Measure the tightening angle using Tool. CAUTION:
Measure the tightening angl e using Tool. Do not measure
visually.
3. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are lower than required quantity, fill to the specified level. Refer to MA-13, "
Fluids and Lubricants".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system. Limit (d1 - d2) : 0.23 mm (0.0091 in)
KBIA0189E
PBIC0068E
Step a : 44.1 N·m (4.5 kg-m, 33 ft-lb)
Step b : 70°
clockwise
Step c : Loosen in the reverse order of tightening.
Step d : 44.1 N·m (4.5 kg-m, 33 ft-lb)
Step e : 60 ° clockwise
Step f : 60° clockwise
Tool number : KV10112100 (BT-8653-A)
WBIA0603E
Revision: April 20092010 QX56

EM-70
< ON-VEHICLE REPAIR >
CYLINDER HEAD
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill tospecified level if necessary.
• Summary of the inspection items:
*Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Exploded ViewINFOID:0000000005149009
Disassembly and AssemblyINFOID:0000000005149010
DISASSEMBLY
1. Remove the spark plug. Refer to EM-16, "Removal and Installation".
2. Remove the valve lifter. • Identify the installation positions, and store them without mixing them up.
Item Before starting engine Engine runningAfter engine stopped
Engine coolant LevelLeakage Level
Engine oil LevelLeakage Level
Other oils and fluids* LevelLeakage Level
Fuel LeakageLeakageLeakage
Exhaust gas —Leakage —
1. Spark plug 2. Valve lifter3. Valve collet
4. Valve spring retainer 5. Valve spring6. Valve spring seat
7. Valve oil seal 8. Valve guide9. Valve seat
10. Valve (INT) 11. Valve (EXH)12. Cylinder head (LH bank)
13. Spark plug tube 14. Cylinder head (RH bank)
WBIA0470E
Revision: April 20092010 QX56

EM-72
< ON-VEHICLE REPAIR >
CYLINDER HEAD
6. Install the valve springs.• Install the narrow pitch end (paint mark side) to the cylinderhead side.
7. Install the valve spring retainers.
8. Install the valve collet using Tools.
CAUTION:
When working, take care not to damage valve lifter holes.
9. Install the valve lifters. • Install the removed parts in their original locations.
• If installing new lifters, select the correct size lifter for proper valve clearance. Refer to EM-18, "
Va l v e
Clearance".
10. Install the spark plug tube if necessary, following the procedure below.
a. Remove any old liquid gasket adhering to the cylinder-head spark plug tube hole.
b. Apply liquid gasket to area within approximately 12 mm (0.47 in) from the edge of the spark plug tube
press-fit side.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to GI-15, "
Recommended Chemical Prod-
ucts and Sealants".
c. Press-fit the spark plug tube to the specified height “H” using suitable tool.
CAUTION:
• When press-fitting, take care not to deform the spark plugtube.
• After press-fitting, wipe off any liquid gasket protruding
onto the cylinder-head upper face.
11. Install the spark plugs.
Inspection After DisassemblyINFOID:0000000005149011
CYLINDER HEAD DISTORTION
1. Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder head surface. CAUTION:
Do not allow any debris to en ter the oil or coolant passages.
SEM085D
Tool number : KV10116200 (J-26336-A)
: KV10115900 (J-26336-20)
: KV10109220 ( — )
WBIA0578E
Standard press-fit height “H” :38.400 - 39.400 mm (1.512 - 1.551 in)
KBIA1248E
Revision: April 20092010 QX56

EM-78
< REMOVAL AND INSTALLATION >
ENGINE ASSEMBLY
REMOVAL AND INSTALLATION
ENGINE ASSEMBLY
Exploded ViewINFOID:0000000005149012
Removal and InstallationINFOID:0000000005149013
WARNING:
• Situate vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts described in PARTS
CATALOG.
CAUTION:
• Always be careful to work safely, avoid forceful or uninstructed operations.
• Do not start working until exh aust system and engine coolant are cooled sufficiently.
• If items or work required are no t covered by the engine section, follow the applicable procedures.
• Always use the support poin t specified for lifting.
• Use either 2-point lift type or separate type lift. If board-on type is used for unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool before starting work, in
preparation for the backward shift of center of gravity.
• For supporting points for lifting and jacking point at rear axle, refer to GI-30, "
Garage Jack and
Safety Stand".
REMOVAL
Preparation
1. Rear engine mounting insulator 4WD 2. Rear engine mounting insulator 2WD 3. LH engine mounting bracket
4. LH heat shield plate 5. LH engine mounting insulator 6. RH engine mounting bracket
7. RH heat shield plate 8. RH engine mounting insulator A. Refer to Installation
Front
AWBIA0817GB
Revision: April 20092010 QX56

ENGINE ASSEMBLYEM-79
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
1. Release the fuel pressure. Refer to
EC-489, "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. Partially drain the A/T fluid. Refer to TM-150, "
Changing the A/T Fluid (ATF)".
5. Disconnect the battery negative and positive terminal. Refer to PG-74, "
Removal and Installation".
6. Remove the engine hood. Refer to DLK-234, "
Removal and Installation of Hood Assembly".
7. Remove the cowl extension. Refer to EXT-18, "
Removal and Installation".
8. Remove the engine room cover using power tools.
9. Remove the air duct and air cleaner case assembly. Refer to EM-25, "
Removal and Installation".
10. Disconnect the vacuum hose between the vehicle and engine and set it aside.
11. Remove the radiator assembly and hoses. Refer to CO-15, "
Removal and Installation".
12. Remove the drive belt. Refer to EM-13, "
Removal and Installation".
13. Remove the fan blade. Refer to CO-18, "
Removal and Installation (Crankshaft Driven Type)".
14. Disconnect the engine room harness from the fuse box and set it aside.
15. Disconnect the ECM.
16. Disconnect the engine room harness from the engine side and set it aside.
17. Disconnect the engine harness grounds.
18. Disconnect the power steering reservoir t ank from the engine and move it aside.
19. 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"
20. Remove the A/C compressor bolts and set the compressor aside. Refer to HA-31, "Removal and Installa-
tion for Compressor" (ATC).
21. Disconnect the brake booster vacuum line.
22. Disconnect the EVAP line.
23. Disconnect the fuel hose at the engine side connection. Refer to EM-40, "
Removal and Installation".
24. Disconnect the heater hoses at the cowl, and in stall plugs to avoid leakage of engine coolant.
25. Remove the A/T oil level indicator and indicator tube upper bolts.
26. Remove the front final drive assembly (4WD only). Refer to DLN-215, "
Removal and Installation".
27. Remove the exhaust manifolds. Refer to EM-30, "
Removal and Installation".
28. Install the engine slingers into the left bank cylinder head and right bank cylinder head.
29. Disconnect and remove the crankshaft position sensor (POS). Refer to EM-82, "
Exploded View".
30. Remove the A/T. Refer to TM-186, "
Removal and Installation
(2WD)" or TM-188, "Removal and Installation (4WD)".
31. Lift using a hoist and secure the engine in position.
32. Remove the engine assembly from the vehicle, avoid interfer- ence with the vehicle body.
CAUTION:
WBIA0795E
Engine slinger torque: 45.0 N·m (4.6 kg-m, 33 ft-lb)
WBIA0715E
Revision: April 20092010 QX56

ENGINE ASSEMBLYEM-81
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
• Tighten engine mounting bracket bolts in numerical order as
shown.
CAUTION:
• When replacing an engine or tr ansmission you must make sure the dowels are installed correctly
during re-assembly.
• Improper alignment caused by missing dowels m ay cause vibration, oil leaks or breakage of driv-
etrain components.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-13, "
Fluids and Lubricants".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration. NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:
*Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Engine mounting bracket
bolts : 49 N·m (5.0 kg-m, 36 ft-lb)
AWBIA0820ZZ
Item
Before starting engine Engine runningAfter engine stopped
Engine coolant LevelLeakage Level
Engine oil LevelLeakage Level
Other oils and fluids* LevelLeakage Level
Fuel LeakageLeakage Leakage
Exhaust gas —Leakage —
Revision: April 20092010 QX56