Nissan Frontier D40. Manual - part 579

EM-48

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[QR25DE]

TIMING CHAIN

Tighten bolts in numerical order as shown with the following pro-
cedure to install balancer unit, using Tool.

CAUTION:

If bolts are re-used, check their outer diameter before instal-
lation. Follow the "Balancer Unit Bolt Outer Diameter" pro-
cedure.

CAUTION:

• Check tightening angle using Tool or a protractor. Do not

make judgment by visual check alone.

• In step 3, loosen bolts in reverse order as shown.
NOTE:
Apply new engine oil to threads and seat surfaces of bolts.

Install crankshaft sprocket, balancer unit sprocket and balancer
unit timing chain.
• Make sure that crankshaft sprocket is positioned with mating

marks on cylinder block and crankshaft sprocket meeting at
the top.

• Install it by aligning mating marks on each sprocket and bal-

ancer unit timing chain.

• Secure the hexagonal portion of the balancer shaft using a

suitable tool. Tighten the balancer unit sprocket bolt to the
specified torque.

NOTE:
Install crankshaft sprocket, balancer unit sprocket and balancer
unit timing chain at the same time.

Install balancer unit timing chain tensioner.
• After installation, make sure the mating marks have not

slipped, then remove stopper pin and release tensioner
sleeve.

Tool number

: KV10112100 (BT8653-A)

Balancer bolt torque

Step 1 bolts 1 - 4

: 48.1 N·m (4.9 kg-m, 35 ft-lb)

Step 2 bolts 1 - 4

: 100

clockwise

Step 3 bolts 1 - 4

: 0 N·m (0 kg-m, 0 ft-lb)

Step 4 bolts 1 - 4

: 48.1 N·m (4.9 kg-m, 35 ft-lb)

Step 5 bolts 1 - 4

: 100

clockwise

Step 6 bolts 5 - 6

: 30.1 N·m (3.1 kg-m, 22 ft-lb)

PBIC3028E

PBIC3030E

PBIC2183E

PBIC3032E

TIMING CHAIN

EM-49

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Install timing chain and related parts.
• Install by aligning mating marks on each sprocket and timing

chain.

• Before and after installing chain tensioner, check again to

make sure that mating marks have not slipped.

• After installing chain tensioner, remove stopper pin, and make

sure that tensioner moves freely.

CAUTION:

• For the following note, after the mating marks are

aligned, keep them aligned by holding them with a hand.

• To avoid skipped teeth, do not rotate crankshaft and

camshaft 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 on each
sprocket for alignment.

Install front oil seal to front cover. Refer to

EM-61, "Removal and Installation of Front Oil Seal"

Install O-rings to cylinder head and cylinder block.

Apply a continuous bead of liquid gasket with the tube presser
to front cover as shown, using Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

NOTE:
Application instruction differs depending on the position.

10. Make sure that mating marks of timing chain and each sprocket are still aligned. Then install front cover.

CAUTION:

Be careful not to damage front oil seal by interference with front end of crankshaft.

PBIC3029E

Tool number

: WS39930000 (

—

)

Detail of A

: Cross over the start of the applica-
tion and the end.

Detail of B

: Apply liquid gasket outside of bolt
holes. (For all bolt holes other than B,
apply to the inside.)

Detail of C

: Between here only, apply 4.5 - 5.5
mm (0.177 - 0.217 in) dia.

PBIC3031E

EM-50

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TIMING CHAIN

11. Tighten bolts in numerical order as shown.

• Use the following for locating M6 bolts.

• Tighten bolts to the specified torque.

12. After all bolts are tightened, retighten them to the specified

torque in numerical order as shown.

CAUTION:

Be sure to wipe off any excessive liquid gasket leaking to
surface for fitting oil pan.

13. Install chain guide between camshaft sprockets.
14. Install O-rings to the camshaft sprocket (INT) insertion points on backside of intake valve timing control

cover.

15. Install O-ring to front cover.
16. Apply a continuous bead of liquid gasket using Tool to intake

valve timing control cover as shown.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

17. Tighten bolts in numerical order as shown.

18. Install intake valve timing control solenoid valve to intake valve timing control cover if removed.
19. Connect ground cables, and install harness clip.

20. Insert crankshaft pulley by aligning with crankshaft key.

• When inserting crankshaft pulley with a plastic hammer, tap on its center portion (not circumference).

CAUTION:

Do not damage front oil seal lip section.

Bolt position

Bolt length

5, 10, 14, 17

: 45 mm (1.77 in)

Except the above (Except
1 through 4)

: 20 mm (0.79 in)

Bolt position

Torque specification

5 through 17

: 12.8 N·m (1.3 kg-m, 9 ft-lb)

1 through 4

: 49.0 N·m (5.0 kg-m, 36 ft-lb)

KBIA0083E

Tool number

: WS39930000 (

—

)

SBIA0260E

KBIA0085E

TIMING CHAIN

EM-51

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21. Tighten crankshaft pulley bolt.

• Secure crankshaft pulley using suitable tool, and tighten crankshaft pulley bolt.

Apply new engine oil to thread and seat surfaces of crankshaft pulley bolt.

Tighten crankshaft pulley bolt.

Put a paint mark on crankshaft pulley, mating with any one of six
easy to recognize angle marks on bolt flange.

Turn another 60

degrees clockwise (angle tightening).

• Check the tightening angle with movement of one angle mark.

22. Installation is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are

lower than required quantity, fill to the specified level. Refer to

MA-16, "For North America: Fluids and Lubri-

cants"

• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel

leakage at the connection points.

• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.

NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.

• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including

engine oil and engine coolant.

• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to

specified level if necessary.

• Summary of the inspection items:

* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

: 42.1 N·m (4.3 kg-m, 31 ft-lb)

SEM751G

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluids*

Level

Leakage

Level

Fuel

Leakage

Exhaust gas

—

Leakage

—

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