Nissan Frontier. Manual — part 714
TIMING CHAIN
EM-45
< REMOVAL AND INSTALLATION >
[QR25DE]
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TIMING CHAIN
Exploded View
INFOID:0000000009478064
1.
O-ring
2.
Camshaft sprocket (INT)
3.
Camshaft sprocket (EXH)
4.
Chain tensioner
5.
Spring
6.
Chain tensioner plunger
7.
Timing chain slack guide
8.
Timing chain
9.
Front cover
10. Chain guide
11.
Intake valve timing control solenoid
valve
12. Intake valve timing control cover
13. Oil ring
14. Front oil seal
15. Crankshaft pulley
16. Crankshaft pulley bolt
17. Crankshaft sprocket
18. Spacer
19. Balancer unit timing chain tensioner
20. Timing chain tension guide
21. Balancer unit
22. Balancer unit sprocket
23. Balancer unit timing chain
A.
B.
WBIA0834E
EM-46
< REMOVAL AND INSTALLATION >
[QR25DE]
TIMING CHAIN
Removal and Installation
INFOID:0000000009478065
REMOVAL
1. Remove engine under cover. Refer to
EXT-15, "Removal and Installation"
.
2. Release the fuel pressure. Refer to
3. Remove the air cleaner case and air duct and resonator assembly. Refer to
.
4. Remove the spark plugs. Refer to
EM-18, "Removal and Installation"
5. Remove the rocker cover. Refer to
EM-37, "Removal and Installation"
.
6. Remove the coolant overflow reservoir tank.
7. Remove the drive belt auto-tensioner. Refer to
EM-15, "Removal and Installation of Drive Belt Auto-Ten-
.
8. Remove the generator. Refer to
CHG-28, "Removal and Installation - QR25DE Models"
.
9. Remove the strut tower brace. Refer to
.
10. Dismount and position aside the A/C compressor with the piping attached.
11. Dismount and position aside the power steering pump and reservoir tank with the piping attached.
12. Remove the oil pan, and oil strainer. Refer to
EM-33, "Removal and Installation"
13. Remove intake valve timing control cover bolts in the order as
shown.
14. Remove the intake valve timing control cover by cutting the seal-
ant using Tool.
15. Pull chain guide between camshaft sprockets out through front
cover.
16. Set the No.1 cylinder at TDC on the compression stroke with the
following procedure:
a. Rotate the crankshaft pulley clockwise and align the mating
marks to the timing indicator on the front cover.
b. At the same time, make sure that the mating marks on the cam-
shaft sprockets are lined up as shown.
• If not lined up, rotate the crankshaft pulley one more turn to line up
the mating marks to the positions as shown.
Tool number
: KV10111100 (J-37228)
KBIA0085E
KBIA0190E
KBIA0115E
TIMING CHAIN
EM-47
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17. Remove crankshaft pulley with the following procedure:
a. Hold the crankshaft pulley with a suitable tool, then loosen the
crankshaft pulley bolt, and pull the pulley out about 10 mm (0.39
in).
CAUTION:
Do not remove the crank shaft pulley bolt as it will be used
as a supporting point for the Tool.
b. Attach a pulley puller in the M6 (0.24 in diameter) thread hole on
crankshaft pulley, and remove crankshaft pulley.
18. If the front oil seal needs to be replaced, remove it using a suit-
able tool.
19. Remove the front cover as follows:
a. Loosen the front cover bolts in the reverse order as shown, and
remove them.
b. Remove the front cover.
CAUTION:
Be careful not to damage the mating surface.
KBIA0077E
KBIA0078E
SEM829E
KBIA0083E
EM-48
< REMOVAL AND INSTALLATION >
[QR25DE]
TIMING CHAIN
20. Remove timing chain with the following procedure:
a. Push in chain tensioner plunger. Insert a stopper pin into hole on chain tensioner body to secure chain
tensioner plunger and remove chain tensioner.
NOTE:
Use approximately 0.5 mm (0.02 in) dia. hard metal pin as a
stopper pin.
b. Remove timing chain.
CAUTION:
Do not rotate crankshaft or camshaft while timing chain is removed. It causes interference
between valve and piston.
21. Remove camshaft sprockets. Refer to
22. Remove timing chain slack guide, timing chain tension guide and spacer.
23. Remove balancer unit timing chain tensioner with the following procedure:
a. Lift lever up, and release ratchet claw for return proof.
b. Push tensioner sleeve in, and hold it.
c.
Matching the hole on lever with the one on body, insert a stopper
pin to secure tensioner sleeve.
NOTE:
Use approximately 1 mm (0.04 in) dia. hard metal pin as a stop-
per pin.
d. Remove balancer unit timing chain tensioner.
24. Secure the hexagonal portion of the balancer shaft using a suitable tool. Loosen the balancer unit
sprocket bolt.
25. Remove balancer unit timing chain, balancer unit sprocket and crankshaft sprocket.
NOTE:
When removing balancer unit timing chain, remove crankshaft sprocket and balancer unit sprocket at the
same time.
26. Loosen bolts in reverse order as shown, and remove balancer
unit.
CAUTION:
Do not disassemble balancer unit.
NOTE:
Use socket (size E14) for bolts No.1 to 4.
INSPECTION AFTER REMOVAL
Timing Chain
KBIA0048E
PBIC3027E
PBIC3028E
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