Infiniti M45 (Y34). Manual - part 535

ENGINE ASSEMBLY

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2.

Remove engine undercover with power tool.

3.

Remove engine cover. Refer to 

EM-12, "ENGINE ROOM COVER"

 .

4.

Drain coolant from radiator drain plug. Refer to 

CO-9, "DRAINING ENGINE COOLANT"

 .

5.

Remove the following parts:

●

Battery: Refer to 

SC-8, "Removal and Installation"

 .

●

Air duct and air cleaner case assembly; Refer to 

EM-16, "AIR CLEANER AND AIR DUCT"

 .

●

Drive belts; Refer to 

EM-13, "DRIVE BELTS"

 . 

●

Accelerator wire; Refer to 

ACC-2, "Removal and Installation"

 .

●

Radiator assembly and hoses. Refer to 

CO-12, "Removal and Installation"

 .

Engine Room Left

1.

Disconnect heater hoses, and install plugs to avoid leakage of coolant.

2.

Disconnect wire bonding exhaust manifold cover to vehicle.

3.

Disconnect vacuum hose between vehicle and engine and set it aside.

4.

Remove reservoir tank for cooling fan. Refer to 

CO-19, "COOLING FAN"

 .

5.

Discharge refrigerant from A/C circuit. Refer to 

ATC-134, "REFRIGERANT LINES"

  . 

6.

Remove A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to 

ATC-

137, "Removal and Installation of Compressor"

  .

Engine Room Right

1.

Disconnect fuel hose at the engine side connection.

●

For disconnection/connection of quick connector, refer to 

EM-31, "FUEL INJECTOR AND FUEL TUBE"

.

2.

Disconnect wire bonding exhaust manifold cover to vehicle.

3.

Disconnect vacuum hose between vehicle and engine and set it aside. 

4.

After draining fluid, remove power steering piping at the following parts:

●

Reservoir tank side between oil cooler and reservoir tank.

●

High pressure hose side between oil cooler and high pressure hose.

Vehicle inside

1.

Separate engine room harness indoors, and pull out engine room harness toward the engine side, tack
them temporarily according to the following procedures.

a.

Remove front kicking plate and dash side finisher. Refer to 

EI-34, "BODY SIDE TRIM"

 .

b.

Remove instrument lower cover, glove box assembly and glove box cover. Refer to 

IP-10, "INSTRUMENT

PANEL ASSEMBLY"

 .

c.

Separate all the harness connectors connected to engine harness on the indoor side.

d.

Remove the intermediate fixed point, pull out engine connectors to the engine room side, then temporarily
on the engine.

CAUTION:

●

Pull out the harness and connectors carefully to avoid being damaged.

●

After the temporary tacking, cover those connectors with plastic bags to avoid adhering foreign
matters.

Vehicle Underbody

1.

Remove exhaust front tube with power tool. Refer to 

EX-3, "Removal and Installation"

 .

2.

Disconnect steering lower joint, and release steering shaft. Refer to 

PS-13, "Removal and Installation"

 .

3.

Remove front cross bar.Refer to 

FSU-8, "Components"

 .

4.

Disconnect propeller shaft. Refer to 

PR-5, "Removal and Installation"

 .

5.

Remove stabilizer bar connecting rod at upper side with power tool. Refer to 

FSU-6, "FRONT SUSPEN-

SION ASSEMBLY"

  .

6.

Remove steering outer socket from strut assembly. Refer to 

FSU-6, "FRONT SUSPENSION ASSEMBLY"

.  

7.

Remove suspension arm from strut assembly. Refer to 

FSU-6, "FRONT SUSPENSION ASSEMBLY"

  .

8.

Remove A/T oil cooler tube. Refer to 

AT-331, "TRANSMISSION ASSEMBLY"

  .

EM-78

ENGINE ASSEMBLY

9.

Remove A/T control rod at transmission side. Refer to 

AT-304, "SHIFT CONTROL SYSTEM"

  .

10. Preparation for the separation work of transmission is as follows:

a.

Remove crankshaft position sensor (POS) from transmission. Refer to

EM-80, "CYLINDER BLOCK"

  .

b.

Remove rear plate cover from oil pan. Then remove bolts fixing drive plate to torque converter. Refer to

EM-25, "OIL PAN AND OIL STRAINER"

    and 

AT-331, "TRANSMISSION ASSEMBLY"

  .

c.

Remove transmission joint bolts which pierce at oil pan lower rear side. Refer to 

AT-331, "TRANSMIS-

SION ASSEMBLY"

  .

Removal Work

1.

Use a manual lift table caddy (commercial service tool) or equiv-
alently rigid tool such as a transmission jack. Securely support
bottom of suspension member and transmission oil pan.

CAUTION:

Put a piece of wood or something similar as the supporting
surface, secure a completely stable condition.

2.

Remove rear member mounting bolts.

3.

Remove suspension member mounting nuts and bolts. Refer to 

FSU-6, "FRONT SUSPENSION ASSEM-

BLY"

  .

4.

Carefully lower engine, transmission and suspension member assembly. When performing work, observe
the following caution.

CAUTION:

●

Confirm there is no interference with vehicle.

●

Make sure all connection points have been disconnected.

●

Keep in mind the center of vehicle gravity changes. If necessary, use jack(s) to support vehicle
at rear jacking point(s) to prevent it from falling it off the lift.

Separation Work

1.

Install engine slingers into front of left bank cylinder head and
rear of right bank cylinder head.

2.

Remove power steering oil pump from engine side. Refer to 

PS-31, "HYDRAULIC LINE"

  . 

3.

Remove engine mounting insulators (right and left) upper side nut.

4.

Lift with hoist and separate engine and transmission assembly from suspension member.

5.

Remove starter motor. Refer to 

SC-9, "STARTING SYSTEM"

  .

6.

Separate engine from transmission assembly. Refer to 

AT-331, "TRANSMISSION ASSEMBLY"

  .

INSTALLATION

Install in the reverse order of removal.

PBIC1190E

Slinger bolts:

: 33.4 N·m (3.4 kg-m,25 ft-lb)

PBIC0082E

ENGINE ASSEMBLY

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●

Where positioning pin is used, be sure to securely insert it into
the hole of mating part.

●

When installing front engine mounting bracket to cylinder block,
first tighten two bolts on upper side. Then, tighten two bolts on
lower side. (The same applies to both right and left.)

INSPECTION AFTER INSTALLATION

●

Before starting engine, check the levels of engine coolant, engine oil and working fluid. If less than
required quantity, fill to the specified level.

●

Use procedure below to check for fuel leakage.

–

Turn ignition switch ON (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.

●

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil, working fluid,
fuel and exhaust gas.

●

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

●

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.

●

Summary of the inspection items:

PBIC0083E

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Working fluid

Level

Leakage

Level

Fuel

—

Leakage

—

Exhaust gas

—

Leakage

—

EM-80

CYLINDER BLOCK

CYLINDER BLOCK

PFP:11010

Disassembly and Assembly

ABS000M1

1.

Knock sensor sub harness

2.

Knock sensor 

3.

Cylinder block

4.

Cover

5.

Main bearing

6.

Top ring

7.

Second ring

8.

Oil ring

9.

Crankshaft key

10.

Piston

11.

Connecting rod

12.

Snap ring

13.

Piston pin

14.

Connecting rod bearing

15.

Connecting rod bearing cap

16.

Block heater protector

17.

Connector cap

18.

Cylinder block heater

19.

Gasket

20.

Main bearing cap

21.

Thrust bearing

22.

Main bearing

23.

Rear plate

24.

Crankshaft

25.

Pilot converter

26.

Drive plate

27.

Thrust bearing

28.

Side bolt

29.

Reinforcement plate

30.

Crankshaft position sensor (POS)

31.

O-ring

32.

Rear oil seal

33.

Rear oil seal retainer

PBIC1274E