Infiniti QX56 (Z62). Manual — part 665
EM-100
< UNIT REMOVAL AND INSTALLATION >
ENGINE ASSEMBLY
3.
Install engine slinger on both front right and front left sides of the
engine.
4.
Hoist the slinger to obtain room for engine assembly.
CAUTION:
Use an engine lifter to prevent the engine slinger from fall-
ing and damaging the rocker cover.
REMOVAL
Outline
At first, remove the transmission and transfer assembly, steering gear and front final drive facing downward.
Then remove the engine.
Preparation
1.
Remove engine cover. Refer to
2.
Release fuel pressure. Refer to
3.
Remove battery and tray. Refer to
.
4.
Remove the following components and related parts:
• Hood assembly. Refer to
.
• Front under cover. Refer to
• Front road wheel and tires. Refer to
5.
Drain engine oil. Refer to
.
6.
Drain engine coolant. Refer to
CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belts.
7.
Drain power steering fluid. Refer to
.
Engine Room Front
1.
Remove drive belt. Refer to
.
2.
Remove fan shroud. Refer to
3.
Remove cooling fan and fan coupling. Refer to
4.
Remove radiator hoses (upper and lower).
5.
Remove radiator.
Vehicle Underbody
1.
Remove exhaust front tube. Refer to
2.
Remove protector A and B. Refer to
SCS-32, "FRONT TUBE ASSEMBLY : Exploded View"
3.
Remove front suspension rear cross member. Refer to
(2WD models) or
(4WD models).
4.
Remove oil cooler. Refer to
A
: Engine front slinger (bank 2)
B
: Engine front slinger (bank 1)
Slinger bolts:
: 45.0 N·m (4.6 kg-m, 33 ft-lb)
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ENGINE ASSEMBLY
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< UNIT REMOVAL AND INSTALLATION >
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5.
Remove A/T assembly. Refer to
(2WD models) or
(4WD models).
6.
Remove steering gear assembly. Refer to
.
7.
Remove front final drive assembly. Refer to
.
8.
Remove exhaust manifold. Refer to
.
9.
Remove alternator. Refer to
.
Engine Room LH
1.
Remove air cleaner and air duct. Refer to
.
2.
Remove A/C compressor. Refer to
.
3.
Disconnect fuel feed hose and EVAP hose. Refer to
.
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leakage.
Engine Room RH
1.
Remove power steering oil pump and reservoir tank. Refer to
2.
Disconnect heater hose at heater core side, and fit a plug onto hose end to prevent engine coolant leak-
age.
3.
Disconnect ground cable.
4.
Disconnect all clips and connectors of the engine harness from vehicle side.
Removal Work
1.
Install alternator bracket. Refer to
.
• Temporarily tighten mounting bolts.
2.
Remove intake manifold. Refer to
3.
Remove starter motor. Refer to
.
4.
Install engine slingers.
5.
Lift using a hoist and secure the engine in position.
6.
Remove engine mounting bracket (LH, RH) and engine mounting insulator (LH, RH). Refer to
7.
Remove the engine from the vehicle, avoid interference with the
vehicle body.
CAUTION:
• Before and during lifting, always check that any har-
nesses are left connected.
• Never damage engine mounting insulator and avoid oil/
grease smearing or spills onto engine mounting insulator.
A
Engine front slinger (bank 2)
B
Engine rear slinger
C
Engine front slinger (bank 1)
Slinger bolts:
: 45.0 N·m (4.6 kg-m, 33 ft-lb)
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< UNIT REMOVAL AND INSTALLATION >
ENGINE ASSEMBLY
INSTALLATION
Install in the reverse order of removal.
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed correctly
during re-assembly.Improper alignment caused by missing dowels may cause vibration, oil leaks or
breakage of drivetrain components.
Inspection
INFOID:0000000006289578
INSPECTION AFTER INSTALLATION
Inspection for Leakage
The following are procedures for checking fluid leakage, lubricant leakage.
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If any are less than the
required quantity, fill them to the specified level. Refer to
MA-10, "Fluids and Lubricants"
.
• Follow the procedure below to check for fuel leakage.
- Turn ignition switch to the “ON” position (with engine stopped). With fuel pressure applied to fuel piping,
check for fuel leakage at 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 chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate a malfunction. The
noise will stop after hydraulic pressure rises.
• Warm up engine thoroughly to check that there is no leakage of fuel, or any oil/fluids including engine oil and
engine coolant.
• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill them to
the specified level, if necessary.
Summary of the inspection items:
*: Power steering fluid, brake fluid, etc.
Items
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Transmission /
transaxle fluid
AT & CVT Models
Leakage
Level / Leakage
Leakage
MT Models
Level / Leakage
Leakage
Level / Leakage
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gases
—
Leakage
—
ENGINE STAND SETTING
EM-103
< UNIT DISASSEMBLY AND ASSEMBLY >
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UNIT DISASSEMBLY AND ASSEMBLY
ENGINE STAND SETTING
Setting
INFOID:0000000006289579
NOTE:
Explained here is how to disassemble with engine stand supporting transmission surface. When using a differ-
ent type of engine stand, note the difference in the steps, etc.
1.
Remove the engine assembly from the vehicle. Refer to
2.
Remove crankshaft pulley. Refer to
EM-96, "FRONT OIL SEAL : Removal and Installation"
.
NOTE:
The drive plate is fixed with a ring gear stopper [SST: KV10119200 (J-49277)]. Loosen the crankshaft pul-
ley mounting bolts before installing the engine stand.
3.
Remove the parts that may restrict installation of engine to a widely used engine stand.
• Fix crankshaft with a ring gear stopper [SST: KV10119200 (J-49277)]. Loosen drive plate mounting bolt
with power tool.
• Check for deformation or damage of drive plate. Refer to
.
NOTE:
The procedure is described assuming that you use a widely used engine stand holding the surface, to
which transmission is installed.
4.
Remove pilot converter using the pilot bushing puller (commercial service tool), if necessary.
5.
Lift the engine with hoist to install it onto the widely used engine stand.
CAUTION:
Use an engine stand that has a load capacity [240 kg (529 lb) or more] large enough for supporting
the engine weight.
• If the load capacity of the stand is not adequate, remove the following parts beforehand to reduce the
potential risk of overturning the stand.
- Remove intake manifold. Refer to
.
- Remove fuel injector and fuel tube assembly. Refer to
.
- Remove ignition coil. Refer to
- Remove rocker cover. Refer to
- Remove exhaust manifold. Refer to
- Other removable brackets.
NOTE:
The figure shows an example of widely used engine stand (A)
that can hold mating surface of transmission with drive plate
removed.
CAUTION:
Before removing the hanging chains, check the engine
stand is stable and there is no risk of overturning.
6.
Drain engine oil. Refer to
.
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