Nissan Frontier D40. Manual - part 197

WATER PUMP

CO-49

< ON-VEHICLE REPAIR >

[VQ40DE]

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WATER PUMP

Exploded View

INFOID:0000000005276116

Removal and Installation

INFOID:0000000005276117

CAUTION:

• When removing water pump assembly, be careful not to get engine coolant on timing chain and 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 leaks.

REMOVAL

1.

Remove engine under cover. Refer to 

EXT-13, "Removal and Installation"

.

2.

Drain engine coolant from radiator. Refer to 

CO-38

.

CAUTION:

• Perform this step when engine is cold.
• Do not spill engine coolant on timing chain and drive belt.

3.

Remove the engine room cover. Refer to 

EM-138, "Removal and Installation"

.

4.

Remove air duct and resonator assembly. Refer to 

EM-139, "Removal and Installation"

.

5.

Remove drive belt. Refer to 

EM-127, "Removal and Installation"

.

6.

Remove radiator hose (upper). 

7.

Remove coolant reservoir hose from the radiator.

8.

Remove engine cooling fan (Motor driven type). Refer to 

CO-47, "Removal and Installation (Motor driven

type)"

. 

9.

Remove engine cooling fan (Crankshaft driven type) and fan bracket. Refer to 

CO-46, "Removal and

Installation (Crankshaft driven type)"

.

1.

Water pump

2.

Timing chain tensioner (primary)

3.

Chain tensioner cover

4.

Water drain plug (front)

5.

Water pump cover

6.

O-ring

7.

O-ring

PBIC2833E

CO-50

< ON-VEHICLE REPAIR >

[VQ40DE]

WATER PUMP

10. Remove chain tensioner cover and water pump cover from front

timing chain case, using Tool.

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

a.

Loosen clip of timing chain tensioner (primary), and release
plunger stopper (1).

b.

Insert plunger into tensioner body by pressing slack guide (2).

c.

Keep slack guide pressed and hold plunger in by pushing stop-
per pin through the tensioner body hole and plunger groove (3).

d.

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

e.

Remove bolts and remove timing chain tensioner (primary).

CAUTION:

Be careful not to drop bolts inside timing chain case.

12. Remove water pump as follows:

Tool number

: KV10111100 (J-37228)

PBIC2662E

PBIC2835E

PBIC2834E

PBIC2836E

WATER PUMP

CO-51

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a.

Remove three water pump bolts. Secure a gap between water
pump gear and timing chain, by turning crankshaft pulley coun-
terclockwise until timing chain looseness on water pump
sprocket becomes maximum. 

b.

Screw M8 bolts [pitch: 1.25 mm (0.049 in) length: approx. 50
mm (1.97 in)] into water pumps upper and lower 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.

• Do not spill engine coolant into timing chain case.

c.

Remove M8 bolts and O-rings from water pump.

CAUTION:

Do not disassemble water pump.
NOTE:
Do not reuse O-rings.

INSPECTION AFTER REMOVAL

• Check for badly rusted or corroded water pump body assembly.
• Check for rough operation due to excessive end play.
• Replace water pump, if necessary.

INSTALLATION

1.

Install new O-rings to water pump.
NOTE:
• Apply engine oil to O-rings.
• Locate O-ring with white paint mark to engine front side.

PBIC2863E

JLC357B

SLC943A

PBIC2837E

CO-52

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WATER PUMP

2.

 Install water pump.

CAUTION:

Do not allow timing chain case to pinch O-rings when
installing water pump.
• Make sure that timing chain and water pump sprocket are

engaged.

• Insert water pump by tightening bolts alternately and evenly.

3.

Install timing chain tensioner (primary) as follows:

a.

Remove dust and foreign material completely from backside of timing chain tensioner (primary) and from
installation area of rear timing chain case.

b.

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

c.

Install timing chain tensioner (primary) with its stopper pin attached.

CAUTION:

Be careful not to drop bolts inside timing chain case.

d.

Remove stopper pin.

e.

Make sure again that timing chain and water pump sprocket are engaged.

4.

Install chain tensioner cover and water pump cover as follows:

a.

Before installing, remove all traces of old liquid gasket from mat-
ing surface of water pump cover and chain tensioner 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, to mating surface of chain tensioner and water pump cover,
using Tool.

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.

c.

Tighten bolts to specified torque. Refer to 

EM-164, "Exploded

View"

.

PBIC1058E

PBIC2838E

SLC446B

Tool number

: WS39930000 (

—

)

PBIC2663E