Nissan Quest E52. Manual - part 579

ENGINE UNIT

EM-65

< UNIT DISASSEMBLY AND ASSEMBLY >

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ENGINE UNIT

Disassembly

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1.

Remove drive belt. Refer to

EM-25, "Removal and Installation"

2.

Remove intake manifold collector. Refer to 

EM-28, "Exploded View"

.

3.

Remove intake manifold. Refer to 

EM-31, "Exploded View"

.

4.

Remove compressor. Refer to 

HA-31, "COMPRESSOR : Removal and Installation"

.

5.

Remove alternator.

CHG-31, "Removal and Installation"

.

6.

Remove exhaust manifold. Refer to 

EM-33, "Exploded View"

.

7.

Remove oil pan (lower and upper). Refer to 

EM-38, "Exploded View"

.

8.

Remove ignition coil, spark plug and rocker cover. Refer to 

EM-52, "Exploded View"

.

9.

Remove fuel injector and fuel tube. Refer to 

EM-47, "Exploded View"

.

10. Remove timing chain and rear timing chain case. Refer to 

EM-67, "Removal and Installation"

.

11. Remove camshaft. Refer to 

EM-84, "Exploded View"

.

12. Remove cylinder head. Refer to 

EM-93, "Exploded View"

.

Assembly

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Assembly in the reverse order of disassembly.

EM-66

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TIMING CHAIN

TIMING CHAIN

Exploded View

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1.

Timing chain tensioner (secondary)
(bank 2)

2.

Internal chain guide

3.

Timing chain tensioner (secondary)
(bank 1)

4.

Oil temperature sensor

5.

Camshaft sprocket (EXH)

6.

O-ring

7.

Timing chain (secondary)

8.

Timing chain (primary)

9.

Camshaft sprocket (INT)

10. Slack guide

11. Timing chain tensioner (primary)

12.

Crankshaft sprocket

13. Rear timing chain case

14. Tension guide

15.

O-ring

16. O-ring

17. O-ring

18.

Front timing chain case

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TIMING CHAIN

EM-67

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Removal and Installation

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REMOVAL

1.

Remove the following parts:
• Remove intake manifold collector. Refer to 

EM-29, "Removal and Installation"

.

• Remove rocker covers (bank 1 and bank 2). Refer to 

EM-52, "Exploded View"

.

• Remove oil pans (lower and upper) and oil strainer. Refer to 

EM-38, "Exploded View"

.

• Remove drive belt and auto tensioner. Refer to 

EM-13, "Removal and Installation"

 and 

EM-25,

"Exploded View"

.

2.

Separate engine harness removing their brackets from front timing chain case.

3.

Remove camshaft sprocket covers.
• Loosen mounting bolts in the reverse order as shown in the

figure.

CAUTION:

Shaft is internally jointed with camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.

4.

Obtain No. 1 cylinder at TDC of its compression stroke as follows:

a.

Rotate crankshaft pulley clockwise to align timing mark (grooved
line without color) (

) with timing indicator.

19.

Camshaft sprocket cover gasket 
(bank 1)

20. Camshaft sprocket cover (bank 1) 21.

Intake valve timing control solenoid valve 
(bank 1)

22. Seal ring

23. Water pump cover

24.

Front oil seal

25. Crankshaft pulley

26. Crankshaft pulley bolt

27.

Intake valve timing control solenoid valve 
(bank 2)

28. Camshaft sprocket cover (bank 2)

29.

Camshaft sprocket cover gasket 
(bank 2)

A.

Comply with the assembly procedure 
when tightening. Refer to 

EM-67

B.

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

EM-67

 : Always replace after every disassembly.

 : N·m (kg-m, ft-lb)

 : N·m (kg-m, in-lb)

 : Should be lubricated with oil.

 : Sealing point

A

:  Bank  1

B

:  Bank  2

C

: Dowel pin hole

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EM-68

< UNIT DISASSEMBLY AND ASSEMBLY >

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TIMING CHAIN

b.

Check that intake and exhaust cam noses on No. 1 cylinder
(engine front side of bank 1) are located as shown in the figure.

• If not, turn crankshaft one revolution (360 degrees) and align

as shown in the figure.

5.

Remove crankshaft pulley as follows:

a.

Fix crankshaft with the pulley holder (commercial service tool)
(A).

b.

Loosen crankshaft pulley bolt and locate bolt seating surface at
10 mm (0.39 in) from its original position.

CAUTION:

Never remove crankshaft pulley bolt as it will be used as a
supporting point for suitable puller.

c.

Place suitable puller tab on holes of crankshaft pulley, and pull
crankshaft pulley through.

CAUTION:

Never put suitable puller tab on crankshaft pulley periphery,
as this will damage internal damper.

6.

Remove front timing chain case as follows:

a.

Loosen mounting bolts in the reverse order as shown in the fig-
ure.

: Engine front

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: Crankshaft pulley

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