Nissan Quest E52. Manual - part 288

 

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Nissan Quest E52. Manual - part 288

 

 

CO-22

< REMOVAL AND INSTALLATION >

WATER PUMP

b.

Turn crank pulley (1) clockwise (direction shown by arrow) to
loosen timing chain on the chain tensioner (primary) side.

c.

Lift self-locking pawl (A) to obtain allowance between the pawl
and the ratchet of plunger (D).

d.

Press plunger into tensioner body.

e.

Fix self-locking pawl at the tip of ratchet and maintain plunger in
its maximum compression.

f.

Insert stopper pin (E) into the tensioner body hole (B) to fix lever
(C).
• Plunger becomes fixed at this step because of the interlock

between the lever and self-locking pawl.

NOTE:
The figure shows a work example of using a precision screw
driver of axis diameter 

φ

1.2 mm as a stopper pin.

g.

Install chain tensioner (primary).
• Completely remove dust and foreign matter from the back of chain tensioner (primary) and the mounting

surface before installing chain tensioner.

h.

After the installation, remove stopper pin (A) to release plunger.

i.

Check again that water pump sprocket and timing chain are
engaged.

4.

Install cam sprocket cover (Bank 1). Refer to 

EM-67, "Removal and Installation"

.

5.

Install water pump cover as per the following instructions:

a.

Remove old liquid gasket on the back of cover, the front timing chain case mounting surface, mounting
bolt threads, and the bolt hole, by using a scraper.
• Clean the mounting surface with white gasoline.

b.

Apply liquid gasket evenly without any gap and overlap. Refer to

CO-5, "Liquid Gasket"

c.

Tighten mounting bolts.

6.

Install water drain plug (front).
• Apply liquid gasket to the threads and tighten the screw.

7.

Install the following items in the reverse order of removal.
NOTE:
When starting the engine or immediately after an engine start
after the removal/installation procedure of chain tensioner (primary), slapping sound may be heard. This is

JPBIA0446ZZ

JPBIA0118ZZ

JPBIA1774ZZ

1

:Water pump cover

a

φ

2.3 - 3.3 mm

JPBIA1722ZZ

WATER PUMP

CO-23

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

I

J

K

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M

A

CO

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O

not a malfunction. The slapping sound is generated due to decrease in oil pressure of the chain tensioner
(primary) and eliminated as oil pressure increases.

Inspection

INFOID:0000000009650553

INSPECTION AFTER REMOVAL

• Check for badly rusted or corroded water pump body assembly.
• Check for rough operation due to excessive end play.
• If anything is found, replace water pump.

INSPECTION AFTER INSTALLATION

• Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the

radiator cap tester (commercial service tool). Refer to 

CO-8, "Inspection"

.

• Start and warm up the engine. Visually check that there is no leakage of engine coolant.

SLC943A

CO-24

< REMOVAL AND INSTALLATION >

WATER INLET AND THERMOSTAT ASSEMBLY

WATER INLET AND THERMOSTAT ASSEMBLY

Exploded View

INFOID:0000000009650554

Removal and Installation

INFOID:0000000009650555

REMOVAL

1.

Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug at the
front of cylinder block. Refer to 

CO-8, "Draining"

 and 

EM-63, "Setting"

.

CAUTION:

• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.

2.

Remove reservoir tank of radiator, and move it aside. Refer to 

CO-13, "Exploded View"

.

3.

Remove camshaft sprocket cover (bank 2). Refer to

EM-66, "Exploded View"

.

4.

Disconnect radiator hose (lower) from water inlet and thermostat assembly.

5.

Remove water inlet and thermostat assembly (1) and gascket.

CAUTION:

Never disassemble water inlet and thermostat assembly.
Replace them as a unit, if necessary.

INSTALLATION

Note the following, and install in the reverse order of removal.
• Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.

1.

Gasket

2.

Water inlet and thermostat assembly

3.

Clamp

4.

Radiator hose (lower)

A.

To radiator

 : Always replace after every disassembly.

 : N·m (kg-m, in-lb)

JPBIA1688GB

A

: Never loosen these screw

JPBIA0261ZZ

WATER INLET AND THERMOSTAT ASSEMBLY

CO-25

< REMOVAL AND INSTALLATION >

C

D

E

F

G

H

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J

K

L

M

A

CO

N

P

O

Inspection

INFOID:0000000009650556

INSPECTION AFTER REMOVAL

1.

Check valve seating condition at ordinary room temperatures. It should seat tightly.

2.

Check valve operation.

• If the malfunctioning condition, when valve seating at ordinary

room temperature, or measured values are out of the standard,
replace water inlet and thermostat assembly.

INSPECTION AFTER INSTALLATION

• Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the

radiator cap tester (commercial service tool). Refer to 

CO-8, "Inspection"

.

• Start and warm up the engine. Visually check that there is no leakage of engine coolant.

Thermostat (Standard)

: Refer to 

CO-28, "Thermostat"

.

SLC949A

 

 

 

 

 

 

 

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