Nissan Frontier D40. Manual - part 611

EM-176

< ON-VEHICLE REPAIR >

[VQ40DE]

TIMING CHAIN

INSTALLATION

NOTE:
The figure above shows the relationship between the mating mark on each timing chain and that on the corre-
sponding sprocket, with the components installed.

1.

Install timing chain tensioners (secondary) to cylinder head if removed. 

a.

Install timing chain tensioners (secondary) with stopper pin attached and new O-ring.

b.

Install camshaft brackets (No. 1). Refer to 

EM-187, "Removal and Installation"

.

2.

Make sure that dowel pin hole, dowel pin of camshaft and crank-
shaft key are located as shown. (No. 1 cylinder at compression
TDC)
• NOTE:

Though camshaft does not stop at the position as shown, for
the placement of cam nose, it is generally accepted camshaft
is placed for the same direction of the figure.

CAUTION:

Hole on small dia. side must be used for intake side dowel pin hole. Do not misidentify (ignore big
dia. side).

WBIA0716E

1.

Internal chain guide

2.

Camshaft sprocket (intake)

3.

Mating mark (blue link)

4.

Mating mark (punched)

5.

Secondary timing chain tensioner

6.

Mating mark (copper link)

7.

Secondary timing chain

8.

Camshaft sprocket (exhaust)

9.

Tensioner guide

10. Water pump

11.

Crankshaft sprocket

12. Mating mark (notched)

13. Primary timing chain

14. Slack guide

15. Primary timing chain tensioner

16. Mating mark (back side)

17. Crankshaft key

Camshaft dowel pin hole (intake side)

: At cylinder head upper face side in each bank.

Camshaft dowel pin (exhaust side)

: At cylinder head upper face side in each bank.

Crankshaft key

: At cylinder head side of right bank.

KBIA1073E

TIMING CHAIN

EM-177

< ON-VEHICLE REPAIR >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

3.

Install timing chains (secondary) and camshaft sprockets as follows:

CAUTION:

Mating marks between timing chain and sprockets slip easily. Confirm all mating mark positions
repeatedly during the installation process.

a.

Push plunger of timing chain tensioner (secondary) and keep it
pressed in with stopper pin.

b.

Install timing chains (secondary) (8) and camshaft sprockets
(INT (1) and EXH (9)).
• Left bank mating marks (6)
• Align the timing chain mating marks (secondary) (2) (blue

color link) with the ones on camshaft sprockets (INT and EXH)
(4), (5), (7) and (10) (punched), and install them.
NOTE:
• Mating marks for camshaft sprocket (INT) are on the back

side of camshaft sprocket (secondary).

• There are two types of mating marks, circle (7), (10) and

oval (4), (5) types. They should be used for the right and left
banks, respectively.

• Align dowel pin (3) and pin hole on camshafts with the groove

(11) and dowel pin on sprockets, and install them.

• On the intake side, align pin hole on the small diameter side of

the camshaft front end with dowel pin (3) on the back side of
camshaft sprocket, and install them.

• On the exhaust side, align dowel pin on camshaft front end

with pin groove (11) on camshaft sprocket, and install them.

• In case that positions of each mating mark and each dowel pin

do not fit on mating parts, make fine adjustment to the position holding the hexagonal portion on cam-
shaft with wrench or equivalent.

• Bolts for camshaft sprockets must be tightened in the next step. Tightening them by hand is enough to

prevent the dislocation of dowel pins.

• It may be difficult to visually check the dislocation of mating

marks during and after installation. To make the matching eas-
ier, make a mating mark on the top of sprocket teeth and its
extended line in advance with paint.

SEM430G

Right bank

: Use circle type (7) and (10).

Left bank

: Use oval type (4) and (5).

WBIA0689E

SEM811G

EM-178

< ON-VEHICLE REPAIR >

[VQ40DE]

TIMING CHAIN

c.

After confirming the mating marks are aligned, tighten camshaft
sprocket bolts.
• Secure camshaft using wrench at the hexagonal portion to

tighten bolts.

d.

Pull stopper pins out from timing chain tensioners (secondary).

4.

Install tension guide.

5.

Install timing chain (primary) as follows:

a.

Install crankshaft sprocket.
• Make sure the mating marks on crankshaft sprocket face the

front of engine.

KBIA1698J

PBIC2110E

SEM929E

TIMING CHAIN

EM-179

< ON-VEHICLE REPAIR >

[VQ40DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

b.

Install the primary timing chain.
• Water pump (G).
• Install primary timing chain so the mating mark punched (B) on

camshaft sprocket is aligned with the blue link (A) on the tim-
ing chain, while the mating mark notched (E) on the crankshaft
sprocket (D) is aligned with the copper link (F) on the timing
chain, as shown.

• When it is difficult to align mating marks (A) with (B) and (E)

with (F) of the primary timing chain with each sprocket, gradu-
ally turn the camshaft using a wrench on the hexagonal por-
tion to align it with the mating marks.

• During alignment, be careful to prevent dislocation of mating

mark alignments of the secondary timing chains.

6.

Install internal chain guide, slack guide and timing chain ten-
sioner (primary).

CAUTION:

WBIA0721E

PBIC2109E