Nissan Altima L32. Manual - part 630

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TIMING CHAIN

24. 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

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.

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PBIC0282E

Limit 

: 0.15 mm (0. 0059 in) or more

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• Check tightening angle with an angle wrench (A) or a pro-

tractor. Do not make judgment by visual check alone.

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.

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°

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°

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TIMING CHAIN

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.

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 

GI-15, "Recommended Chemi-

cal Products and Sealants"

. 

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.

AWBIA0065GB

SBIA0266E

Sealant diameter (C)

: 3.9 mm (0.154 in)

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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.

9. Install IVT cover with the following procedure:
a. Install IVT solenoid valve to IVT cover.
b. Install new O-ring to front cover.
c. Apply Silicone RTV Sealant to the IVT cover as shown.

• Apply Genuine Silicone RTV Sealant or equivalent, to posi-

tions specified as shown. Refer to 

GI-15, "Recommended

Chemical Products and Sealants"

. 

d. Tighten the IVT cover bolts in the numerical order as shown.

10. Insert crankshaft pulley by aligning with crankshaft key. 

• Tap its center with a plastic hammer to insert. 

• Do not tap the belt hook.

11. Tighten crankshaft pulley bolts.

• Secure crankshaft pulley with tool to tighten the bolt.

• Perform angle tightening with the following procedure:

a. Apply new engine oil to threads and seat surfaces of bolts.
b. Tighten to initial specifications:·

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

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Diameter (A)

: 3.0 - 4.0 mm (0.118 - 0.157 in)

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