2010 INFINITI QX56 coolant

ENGINE ASSEMBLYEM-79
< REMOVAL AND INSTALLATION >
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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 >
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• 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

ENGINE UNITEM-83
< DISASSEMBLY AND ASSEMBLY >
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Disassembly and AssemblyINFOID:0000000005149015
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 oil. Refer to LU-9, "
Changing Engine Oil".
3. Drain engine coolant by removing the cylinder block drain plugs “A”, “B”, “C” and “D” as shown.
4. 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".
5. Remove knock sensor and sub harness. CAUTION:
Carefully handle sensor, avoiding shocks.
6. Check connecting rod side clearance. Refer to EM-90, "
Inspection After Disassembly".
7. 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: April 20092010 QX56

EM-86
< DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
ASSEMBLY
1. Fully air-blow the coolant and oil passages in the cylinder block, cylinder bore, and crankcase to removeany foreign material.
WARNING:
Use goggles to protect your eyes.
2. Install each plug to the cylinder block (only screw-type plugs are shown).
• Apply liquid gasket. Use Genuine Thread Sealant or equivalent. Refer to GI-15,
"Recommended Chemical Products and Sealants".
• Replace copper washers with new ones.
• Tighten each plug as specified below.
3. Install main bearings and thrust bearings.
a. Remove any dust, dirt, and oil on the bearing mating surfaces of the cylinder block and main bearing caps.
b. Install thrust bearings to both sides of the No. 3 journal housing on the cylinder block and main bearing caps
• Install thrust bearings with the oil groove facing the crankshaft
arm (outside).
• Install thrust bearings with a protrusion in the center on the
main bearing caps.
c. Install main bearings paying attention to the direction. • Install the one with oil holes onto the cylinder block and theone without oil holes onto the main bearing cap.
• Before installing bearings, apply engine oil to bearing surface
(inside). Do not apply oil to the back surface, but thoroughly
clean it.
• When installing, align the bearing stopper to the notch.
• Ensure the oil holes on the cylinder block and those on the
corresponding bearing are aligned.
4. Install pilot converter to the crankshaft using suitable tool.
5. Install crankshaft to the cylinder block. • While turning crankshaft by hand, make sure it turns smoothly.
Part Washer Tightening torque
A Yes 53.9 N·m (5.5 kg-m, 40 ft-lb)
B No 19.6 N·m (2.0 kg-m, 15 ft-lb)
C Yes 62.7 N·m (6.4 kg-m, 46 ft-lb)
D Yes 62.7 N·m (6.4 kg-m, 46 ft-lb)
WBIA0419E
PBIC0093E
PBIC0094E
EMP0569D
Revision: April 20092010 QX56

EM-94
< DISASSEMBLY AND ASSEMBLY >
ENGINE UNIT
• Measure diameter of piston pin using suitable tool.
Connecting Rod Bushing Oil Clearance (Small End)
(Connecting rod small end oil clearance) = (Inside diameter of con-
necting rod small end) – (Piston pin diameter)
• If measured value exceeds the standard, replace the connectingrod assembly and/or piston and piston pin assembly.
• If replacing the piston and piston pin assembly, use the Table for
Selective Fitting for Piston to select the piston corresponding to the
applicable bore grade of the cylinder block to be used. Refer to
EM-101, "
How to Select Piston and Bearing".
Factory installed parts grading:
• Only grade 0 is available.
Unit: mm (in)
CYLINDER BLOCK DISTORTION
• Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder block surface.
CAUTION:
Do not allow any debris to en ter the oil or coolant passages.
• Measure block upper face for distortion in six directions as shown.
• If measurement exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INSIDE DIAMETER
Standard : 21.989 - 21.995 mm (0.8657 - 0.8659 in)
PBIC0117E
Standard : 0.005 - 0.017 mm (0.0002 - 0.0007 in)
KBIA2536E
Grade 0
Connecting rod bushing inside diameter 22.000 - 22.006
(0.8661 - 0.8664)
Piston pin diameter 21.989 - 21.995
(0.8657 - 0.8659)
Piston pin hole diameter 21.993 - 21.999
(0.8659 - 0.8661)
KBIA2496E
Standard : 0.03 mm (0.0012 in)
Limit : 0.1 mm (0.004 in)
SEM123C
Revision: April 20092010 QX56

EXL-22
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000005369886
AUTO ACTIVE TEST
Description
In auto active test mode, the IPDM E/R sends a drive signal to the follo wing systems to check their operation.
• Oil pressure low/coolant pressure high warning indicator
• Oil pressure gauge
• Rear window defogger
• Front wipers
• Tail, license and parking lamps
• Front fog lamps
• Headlamps (Hi, Lo)
• A/C compressor (magnetic clutch)
• Cooling fan
Operation Procedure
1. Close the hood and front door RH, and lift the wiper a rms from the windshield (to prevent windshield dam-
age due to wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield before hand.
2. Turn ignition switch OFF.
3. Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the ignition switch OFF.
4. Turn the ignition switch ON within 10 seconds. Af ter that the horn sounds once and the auto active test
starts.
5. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.
CAUTION:
• If auto active test mode cannot be actuated, check door switch system. Refer to DLK-71, "
Descrip-
tion".
• Do not start the engine.
Inspection in Auto Active Test Mode
When auto active test mode is actuated, the following 7 steps are repeated 3 times.
Operation
sequence Inspection Location
Operation
1 Rear window defogger 10 seconds
2 Front wipers LO for 5 seconds → HI for 5 seconds
WKIA4655E
Revision: April 20092010 QX56

EXL-122
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Reference ValueINFOID:0000000005369897
VALUES ON THE DIAGNOSIS TOOL
Monitor Item ConditionValue/Status
MOTOR FAN REQ Engine idle speed Changes depending on engine
coolant temperature, air conditioner
operation status, vehicle speed,
etc.0 - 100 %
A/C COMP REQ A/C switch OFF
OFF
A/C switch ON ON
TAIL&CLR REQ Lighting switch OFF
OFF
Lighting switch 1ST, 2ND, HI or AUTO (Light is illuminated) ON
HL LO REQ Lighting switch OFF
OFF
Lighting switch 2ND HI or AUTO (Light is illuminated) ON
HL HI REQ Lighting switch OFF
OFF
Lighting switch HI ON
FR FOG REQ Lighting switch 2ND or AUTO (Light
is illuminated) Front fog lamp switch OFF OFF
• Front fog lamp switch ON
• Daytime light activated (Canada
only) ON
FR WIP REQ Ignition switch ON Front wiper switch OFF
STOP
Front wiper switch INT 1LOW
Front wiper switch LO LOW
Front wiper switch HI HI
WIP AUTO STOP Ignition switch ON Front wiper stop position
STOP P
Any position other than front wiper
stop position ACT P
WIP PROT Ignition switch ON Front wiper operates normally OFF
Front wiper stops at fail-safe opera-
tion
BLOCK
ST RLY REQ Ignition switch OFF or ACC
OFF
Ignition switch START ON
IGN RLY Ignition switch OFF or ACC
OFF
Ignition switch ON ON
RR DEF REQ Rear defogger switch OFF
OFF
Rear defogger switch ON ON
OIL P SW Ignition switch OFF, ACC or engine running
OPEN
Ignition switch ON CLOSE
DTRL REQ Daytime light system requested OFF with CONSULT-III.
OFF
Daytime light system requested ON with CONSULT-III. ON
HOOD SW Hood closed.
OFF
Hood open. ON
Revision: April 20092010 QX56

ADJUSTMENT AND INSPECTIONEXL-145
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
ADJUSTMENT AND INSPECTION
HEADLAMP
HEADLAMP : Aiming AdjustmentINFOID:0000000005146696
NOTE:
• For details, refer to the regulations in your area.
• If vehicle front body has been repaired and /or the headlamp assembly has been replaced, check headlamp
aiming.
HEADLAMP AIMING
NOTE:
• Before performing aiming adjustment, check the following:
- Ensure all tires are inflated to correct pressure.
- Place vehicle and screen on level surface.
- Ensure there is no load in vehicle other than the driver (or equivalent weight placed in driver's position). Coolant and engine oil filled to correct level, and fuel tank full.
- Confirm spare tire, jack and tools are properly stowed.
- Aim each headlamp individually and ensure other headlamp beam pattern is blocked from screen.
- Use adjusting screw to perform aiming adjustment
WKIA1859E
Revision: April 20092010 QX56