Nissan Altima HL32 Hybrid. Manual — part 385
EM-54
< ON-VEHICLE REPAIR >
[QR25DE]
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.
17. Remove the chain slack guide, tension guide, timing chain, and oil pump drive spacer.
18. 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.
19. 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.
20. Remove timing chain tensioner (for balancer unit) (1).
21. Secure width across flats of the balancer LH side shaft using a
suitable tool. Loosen the balancer sprocket bolt.
22. Remove balancer unit timing chain, balancer unit sprocket and
crankshaft sprocket.
23. Loosen bolts in order as shown, and remove balancer unit.
• Use Torx socket (size E14)
CAUTION:
• Do not disassemble balancer unit.
INSPECTION AFTER REMOVAL
Timing Chain
KBIA0049E
PBIC5314E
ALBIA0199ZZ
TIMING CHAIN
EM-55
< ON-VEHICLE REPAIR >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
Check the timing chain for cracks or excessive wear. If a defect is
detected, replace it.
Balancer Unit Bolt Outer Diameter
• Measure outer diameters (d1, d2) at the two positions as shown.
• Measure d2 within the range A.
• If the value difference (d1 - d2) exceeds the limit, replace it with a
new one.
INSTALLATION
NOTE:
• There may be two color variations of the link marks (link colors) on the timing chain.
• There are 26 links between the gold/yellow mating marks on the timing chain; and 64 links between the cam-
shaft sprocket gold/yellow link and the crankshaft sprocket orange/blue link, on the timing chain side without
the tensioner.
1. Make sure the crankshaft key points straight up.
2. Install the balancer unit and tighten the bolts in the numerical
order as shown:
CAUTION:
• When reusing a bolt, check its outer diameter before
installation. Follow the Balancer Unit Bolt Outer Diameter
procedure.
• Apply new engine oil to threads and seating surfaces of
bolts.
• Check tightening angle with an angle wrench (A) or a pro-
tractor. Do not make judgment by visual check alone.
PBIC0282E
Limit
: 0.15 mm (0. 0059 in) or more
KBIA0126E
ALBIA0200ZZ
Tool number
: KV10112100 (BT-8653-A)
Balancer unit bolts
Step 1
Bolts 1-5
: 42 N·m (4.3 kg-m, 31 ft-lb)
Bolt 6
: 36 N·m (3.7 kg-m, 27 ft-lb)
Step 2
Bolts 1-5
: 120
° + 5°
Bolt 6
: 90
° + 5°
ALBIA0201ZZ
EM-56
< ON-VEHICLE REPAIR >
[QR25DE]
TIMING CHAIN
3. Install the crankshaft sprocket and timing chain for the balancer
unit.
• Make sure that the crankshaft sprocket is positioned with mat-
ing marks on the block and sprocket meeting at the top.
• Install it by lining up mating marks on each sprocket and timing
chain.
4. Install timing chain tensioner (for balancer unit) (1).
• Fix the plunger at the most compressed position using a stop-
per pin (A), and then install it.
• Securely pull out (
) the stopper pin after installing the timing
chain tensioner (for balancer unit).
• Check matching mark position of balancer unit drive chain and
each sprocket again.
5. Install timing chain and related parts.
• Install by lining up mating marks on each sprocket and timing
chain as shown.
• Before and after installing timing chain tensioner, check again
to make sure the mating marks have not slipped.
• After installing timing chain tensioner, remove the stopper pin,
and make sure that the tensioner moves freely.
CAUTION:
• For the following note, after the mating marks are aligned,
keep them aligned by holding them by hand.
• To avoid skipped teeth, do not move crankshaft and cam-
shaft until front cover is installed.
NOTE:
Before installing chain tensioner, it is possible to change the
position of mating mark on timing chain for that of each sprocket
for alignment.
Step 3 (Loosen in reverse
order or tightening)
: 0 N·m (0 kg-m, 0 ft-lb)
Step 4
Bolts 1-5
: 42 N·m (4.3 kg-m, 31 ft-lb)
Bolt 6
: 36 N·m (3.7 kg-m, 27 ft-lb)
Step 5
Bolts 1-5
: 120
° + 5°
Bolt 6
: 90
° + 5°
KBIA0123E
AWBIA0139ZZ
AWBIA0065GB
TIMING CHAIN
EM-57
< ON-VEHICLE REPAIR >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
6. Install new front oil seal to front cover, using suitable tool
• Install new oil seal in until it is flush with front end surface of
front cover.
CAUTION:
• Do not reuse oil seal.
• Be careful not to cause damage to circumference of oil
seal.
7. Install front cover with the following procedure:
a. Install O-rings (B) to cylinder head and cylinder block.
b. Apply Genuine Silicone RTV Sealant or equivalent, to positions
(A) specified as shown. Refer to
.
c. Make sure the mating marks on the timing chain and each
sprocket are still aligned. Then install the front cover.
CAUTION:
• Be careful not to damage the front oil seal during installa-
tion with the front end of the crankshaft.
d. Tighten front cover bolts in the numerical order as shown.
e. After all bolts are tightened, retighten them to the specified
torque.
CAUTION:
Wipe off any excess sealant leaking at the surface for
installing the oil pan.
8. Install the chain guide between the camshaft sprockets.
SBIA0266E
Sealant diameter (C)
: 3.9 mm (0.154 in)
ALBIA0203ZZ
Front cover bolts
Bolts (A)
: 49 N·m (5.0 kg-m, 36 ft-lb)
Bolts (B)
: 12.7 N·m (1.3 kg-m, 9 ft-lb)
Bolts (C)
: 12.7 N·m (1.3 kg-m, 9 ft-lb)
Bolts (D)
: 49 N·m (5.0 kg-m, 36 ft-lb)
(E)
Dowel pins
ALBIA0204ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст