Nissan Quest E52. Manual - part 574

OIL SEAL

EM-45

< REMOVAL AND INSTALLATION >

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1.

Remove the following parts:
• Road wheel and tire (RH)
• Splash guard (RH): Refer to 

EXT-23, "Exploded View"

.

• Drive belt: Refer to 

EM-13, "Removal and Installation"

.

• Crankshaft pulley: Refer to 

EM-66, "Exploded View"

.

2.

Remove front oil seal using a suitable tool.

CAUTION:

Be careful not to damage front timing chain case and crank-
shaft.

INSTALLATION

1.

Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.

2.

Install front oil seal.
• Install front oil seal so that each seal lip is oriented as shown in

the figure.

• Using a suitable drift, press-fit until the height of front oil seal is

level with the mounting surface.

- Suitable drift: outer diameter 60 mm (2.36 in), inner diameter

50 mm (1.97 in).

• Check the garter spring is in position and seal lips not inverted.

CAUTION:

• Be careful not to damage front timing chain case and

crankshaft.

• Press-fit straight and avoid causing burrs or tilting oil

seal.

3.

Install in the reverse order of removal after this step.

REAR OIL SEAL

REAR OIL SEAL : Removal and Installation

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REMOVAL

1.

Remove transaxle assembly. Refer to 

TM-174, "Removal and Installation"

. 

2.

Remove drive plate. Refer to 

EM-104, "Exploded View"

.

3.

Remove oil pan (upper). Refer to 

EM-38, "Exploded View"

.

SEM829E

A

: Oil seal lip

B

: Dust seal lip

: Engine inside

: Engine outside

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SEM829E

EM-46

< REMOVAL AND INSTALLATION >

[VQ35DE]

OIL SEAL

4.

Use a seal cutter (SST) to cut away liquid gasket and remove
rear oil seal retainer.

CAUTION:

Be careful not to damage mating surfaces.
NOTE:
Regard both rear oil seal and retainer an assembly.

INSTALLATION

1.

Remove old liquid gasket on mating surfaces of cylinder block and oil pan (upper) using scraper.

2.

Apply new engine oil to both oil seal lip (A) and dust seal lip (B)
of new oil seal retainer.

3.

Apply a continuous bead of liquid gasket with the tube presser
(commercial service tool) to rear oil seal retainer as shown in the
figure.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-22, "Recommended Chemical Products and Sealants"

.

CAUTION:

Attaching should be done within 5 minutes after coating.

4.

Install rear oil seal retainer to cylinder block. Refer to 

EM-104, "Exploded View"

.

• Check the garter spring is in position and seal lips not inverted.

5.

Install in the reverse order of removal after this step.

SEM830E

: Engine inside

: Engine outside

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a

: 

φ

2.0 - 3.0 mm (0.08 - 0.12 in)

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FUEL INJECTOR AND FUEL TUBE

EM-47

< REMOVAL AND INSTALLATION >

[VQ35DE]

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FUEL INJECTOR AND FUEL TUBE

Exploded View

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CAUTION:

Never remove or disassemble parts unless instructed as shown in the figure.

Removal and Installation

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REMOVAL

WARNING:

• Put a “CAUTION: FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventilated area and furnish workshop with a CO

2

 fire extinguisher.

• Never smoke while servicing fuel system. Keep open flames and sparks away from the work area.

1.

Fuel feed hose

2.

Quick connector cap

3.

Fuel tube

4.

O-ring

5.

Fuel damper

6.

Fuel damper cap

7.

Clip

8.

O-ring (black)

9.

Fuel injector

10. O-ring (green)

A.

Comply with the assembly proce-
dure when tightening. Refer to 

EM-

47

 : Always replace after every disassembly.

 : N·m (kg-m, ft-lb)

 : N·m (kg-m, in-lb)

 : Should be lubricated with oil.

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EM-48

< REMOVAL AND INSTALLATION >

[VQ35DE]

FUEL INJECTOR AND FUEL TUBE

• To avoid the danger of being scalded, never drain engine coolant when engine is hot.

1.

Remove air duct (inlet), air cleaner cases (upper and lower) with mass air flow sensor and air duct assem-
bly. Refer to 

EM-26, "Exploded View"

.

2.

Remove engine cover. Refer to 

EM-24, "Exploded View"

.

3.

Release the fuel pressure. Refer to 

EC-141, "Work Procedure"

.

4.

Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to 

CO-8, "Draining"

.

CAUTION:

Perform this step when the engine is cold.

5.

Remove intake manifold collector. Refer to 

EM-28, "Exploded View"

.

6.

When separating fuel feed hose and fuel tube connection, disconnect quick connector as follows:

a.

Remove quick connector cap from quick connector.

b.

Disconnect quick connector from fuel tube as follows:

CAUTION:

Disconnect quick connector by using the quick connector release (commercial service tool: J-
45488), not by picking out retainer tabs.

i.

With the sleeve side of quick connector release facing to quick connector, install the quick connector
release onto fuel tube.

ii.

Insert the quick connector release (A) into quick connector (2)
until sleeve (B) contacts and goes no further. Hold quick connec-
tor release on that position.

CAUTION:

Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.

iii.

Draw and pull out quick connector straight from fuel tube (1).

CAUTION:

• Pull quick connector (E) holding position (D) as shown in

the figure.

• Never pull with lateral force applied. O-ring inside quick connector may be damaged.
• Prepare container and cloth beforehand as fuel will leakage out.
• Avoid fire and sparks.
• Keep parts away from heat source. Especially, be careful when welding is performed around

them.

• Never expose parts to battery electrolyte or other acids.
• Never bend or twist connection between quick connector and fuel feed hose (with damper) dur-

ing installation/removal.

• To keep clean the connecting portion and to avoid dam-

age and foreign materials, cover them completely with
plastic bags, etc. (A) or something similar.

7.

Disconnect harness connector from fuel injector.

C

: Insert and retain

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