Nissan Altima L32. Instruction — part 629
EM-52
< ON-VEHICLE REPAIR >
[QR25DE]
TIMING CHAIN
TIMING CHAIN
Removal and Installation
INFOID:0000000004202125
CAUTION:
Apply new engine oil to parts as indicated in the illustration before installation.
REMOVAL
1. Support the engine and transaxle assembly with suitable tools.
1.
O-rings
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. IVT solenoid valve
12. IVT cover
13. Crankshaft pulley bolt
14. Crankshaft pulley
15. Front oil seal
16. Balancer unit timing chain tensioner
17. Oil pump drive spacer
18. Crankshaft sprocket
19. Timing chain tension guide
20. Balancer unit timing chain
21. Balancer unit
22. Balancer unit sprocket
A.
Follow the installation procedure
AWBIA0592GB
TIMING CHAIN
EM-53
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2. Remove RH splash shield.
3. Remove the upper and lower oil pan, and oil strainer. Refer to
EM-32, "Removal and Installation"
.
4. Remove generator. Refer to
CHG-27, "Removal and Installation"
.
5. Remove engine cover.
6. Disconnect variable timing control solenoid harness connector.
7. Remove engine ground.
8. Remove the coolant overflow reservoir tank.
9. Position the RH engine compartment fuse and relay box aside.
10. Remove the RH engine mount and bracket. Refer to
EM-72, "Removal and Installation"
.
11. Loosen bolts in the numerical order as shown.
a.
Remove the IVT (intake valve timing) control cover using Tool.
12. Pull chain guide between camshaft sprockets out through front cover.
13. 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.
ALBIA0194ZZ
Tool number
: KV10111100 (J-37228)
WBIA0475E
KBIA0190E
EM-54
< ON-VEHICLE REPAIR >
[QR25DE]
TIMING CHAIN
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.
14. Remove crankshaft pulley with the following procedure:
a. Hold the crankshaft pulley using suitable tool, then loosen the
crankshaft pulley bolt, and pull the pulley out about 10 mm (0.39
in).
b. Attach suitable pulley puller in the M 6 (0.24 in diameter) thread
hole on crankshaft pulley, and remove crankshaft pulley using a
suitable puller.
15. Remove the front cover with the following procedure:
a. Loosen the bolts in the numerical order as shown, and remove
them.
b. Remove the front cover.
CAUTION:
• Be careful not to damage the mounting surface.
16. Remove front oil seal using suitable tool, if necessary.
KBIA0115E
KBIA0077E
KBIA0078E
ALBIA0198ZZ
TIMING CHAIN
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17. Remove timing chain with the following procedure:
a. Push in the tensioner plunger. Insert a stopper pin into the hole
on the tensioner body to secure the chain tensioner plunger and
remove chain tensioner.
• Use a wire of 0.5 mm (0.02 in) diameter as a stopper pin.
b. Remove the timing chain.
c. Secure hexagonal part of the camshaft with a wrench and
loosen the camshaft sprocket bolt and remove the camshaft
sprocket for both camshafts.
CAUTION:
• Do not rotate the crankshaft or camshafts while the timing
chain is removed. It can cause damage to the valve and
piston.
18. Remove the chain slack guide, tension guide, timing chain, and oil pump drive spacer.
19. Press stopper tab (A) in the direction shown to push the timing
chain slack guide (B) toward timing chain tensioner (for balancer
unit) (1).
• The slack guide (B) is released by pressing the stopper tab
(A). As a result, the slack guide (B) can be moved.
20. Insert stopper pin (D) into tensioner body hole (C) to secure tim-
ing chain slack guide (B).
NOTE:
Use a hard metal pin with a diameter of approximately 1.2 mm
(0.047 in) as a stopper pin.
21. Remove timing chain tensioner (for balancer unit) (1).
22. Secure width across flats of the balancer LH side shaft using a
suitable tool. Loosen the balancer sprocket bolt.
23. Remove balancer unit timing chain, balancer unit sprocket and
crankshaft sprocket.
KBIA0048E
KBIA0049E
PBIC5314E
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