Nissan Murano Z51. Manual - part 350

WATER PUMP

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WATER PUMP

Exploded View

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Removal and Installation

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CAUTION:

• When removing water pump assembly, be careful not to get engine coolant on drive belt.
• Water pump cannot be disassembled and should be replaced as a unit.
• After installing water pump, connect hose and clamp securely, then check for leakage using the radi-

ator cap tester (commercial service tool) and the radiator cap tester adapter (commercial service
tool).

REMOVAL

1.

Remove the following parts.
• Air duct (inlet): Refer to 

EM-31, "Exploded View"

.

• Engine cover: Refer to 

EM-29, "Exploded View"

.

• Engine under cover
• Front road wheel and tire
• Splash guard (RH): Refer to 

EXT-24, "FENDER PROTECTOR : Exploded View"

.

2.

Drain engine coolant from radiator. Refer to 

CO-11, "Draining"

.

CAUTION:

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

3.

Remove drive belt. Refer to 

EM-17, "Removal and Installation"

.

4.

Remove idler pulleys. Refer to 

EM-30, "Exploded View"

.

5.

Remove reservoir tank of radiator. Refer to 

CO-16, "Exploded View"

.

6.

Remove reservoir tank of power steering oil pump with piping connected, and move it to aside. Refer to

ST-44, "Exploded View"

.

7.

Support oil pan (lower) bottom with transmission jack.

8.

Remove engine mounting insulator (RH), engine mounting bracket (RH) and upper torque rod. Refer to

EM-72, "2WD : Exploded View"

 (2WD models) or 

EM-81, "AWD : Exploded View"

 (AWD models).

1.

Timing chain tensioner (primary)

2.

Valve timing control cover gasket 
(bank 1)

3.

Valve timing control cover (bank 1)

4.

Water drain plug (front)

5.

Water pump cover

6.

O-ring

7.

O-ring

8.

Water pump

A.

Apply engine coolant

B.

Identify with white mark

Refer to 

GI-4, "Components"

 for symbols in the figure.

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< REMOVAL AND INSTALLATION >

WATER PUMP

9.

Remove water drain plug (front) on water pump side of cylinder block to drain engine coolant from engine
inside.

10. Remove valve timing control cover (bank 1) and water pump cover from front timing chain case.

• Use the seal cutter [SST: KV10111100 (J-37228)] to cut liquid gasket for removal.

11. Remove timing chain tensioner (primary) as follows:
a.

Remove lower mounting bolt (1).

CAUTION:

Be careful not to drop mounting bolt inside timing chain
case.

b.

Loosen upper mounting bolt (2) slowly, and then turn chain ten-
sioner (primary) (3) on the mounting bolt so that plunger (4) is
fully expanded.
NOTE:
Even if plunger is fully expanded, it is not dropped from the body
of timing chain tensioner (primary).

c.

Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.

d.

Remove upper mounting bolt, and then remove timing chain ten-
sioner (primary).

CAUTION:

Be careful not to drop mounting bolt inside timing chain
case.

12. Remove water pump as follows:

a.

Remove three water pump mounting bolts. Secure a gap
between water pump gear and timing chain, by turning crank-
shaft pulley counterclockwise until timing chain looseness on
water pump sprocket becomes maximum. 

JPBIA0085ZZ

PBIC4820E

PBIC3576E

PBIC1193E

WATER PUMP

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< REMOVAL AND INSTALLATION >

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b.

Screw M8 bolts [pitch: 1.25 mm (0.0492 in) length: approxi-
mately 50 mm (1.97 in)]  into  water  pumps  upper  and  lower
mounting bolt holes until they reach timing chain case. Then,
alternately tighten each bolt for a half turn, and pull out water
pump.

CAUTION:

• Pull straight out while preventing vane from contacting

socket in installation area.

• Remove water pump without causing sprocket to contact

timing chain.

c.

Remove M8 bolts and O-rings from water pump.

CAUTION:

Never disassemble water pump.

INSTALLATION

1.

Install new O-rings to water pump.
• Apply engine oil and engine coolant to O-rings as shown in the

figure.

• Locate O-ring with white paint mark to engine front side.

2.

Install water pump.

CAUTION:

Never allow cylinder block to nip O-rings when installing
water pump.
• Check that timing chain and water pump sprocket are

engaged.

• Insert water pump by tightening mounting bolts alternately and

evenly.

3.

Install timing chain tensioner (primary) as follows:

a.

Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.

JLC357B

PBIC1397E

SLC031B

PBIC4820E

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< REMOVAL AND INSTALLATION >

WATER PUMP

b.

Pull plunger stopper tab (A) up (or turn lever downward) so as to
remove plunger stopper tab from the ratchet of plunger (D).
NOTE:
Plunger stopper tab and lever (C) are synchronized.

c.

Push plunger into the inside of tensioner body.

d.

Hold plunger in the fully compressed position by engaging
plunger stopper tab with the tip of ratchet.

e.

To secure lever, insert stopper pin (E) through hole of lever into
tensioner body hole (B).
• The lever parts and the tab are synchronized. Therefore, the

plunger will be secured under this condition.

NOTE:
Figure shows the example of 1.2 mm (0.047 in) diameter thin screwdriver being used as the stopper pin.

f.

Install timing chain tensioner (primary).
• Remove dust and foreign material completely from backside of timing chain tensioner (primary) and

from installation area of rear timing chain case.

g.

Remove stopper pin (A).

h.

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

4.

Install valve timing control cover (bank 1) and water pump cover as follows:

a.

Before installing, remove all traces of old liquid gasket from mating surface of water pump cover using
scraper. Also remove traces of old liquid gasket from the mating surface of front timing chain case.

b.

Apply a continuous bead of liquid gasket with the tube presser
(commercial service tool) to mating surface of water pump cover
(1).

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-18, "Recommended Chemical Products and Sealants"

.

CAUTION:

Attaching should be done within 5 minutes after coating.

c.

Tighten mounting bolts.

5.

Install water drain plug (front) on water pump side of cylinder block.
• Apply liquid gasket to the thread of water drain plug (front).

Use Genuine RTV Silicone Sealant or equivalent. Refer to 

GI-18, "Recommended Chemical Prod-

ucts and Sealants"

.

6.

Install in the reverse order of removal after this step.
• After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to

purge air from the high-pressure chamber of chain tensioner. Engine may produce a rattling
noise. This indicates that air still remains in the chamber and is not a matter of concern.

Inspection

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INSPECTION AFTER REMOVAL

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JPBIA1774ZZ

a

: 

φ

2.3 - 3.3 mm (0.091 - 0.130 in)

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