Infiniti QX56 (JA60). Manual - part 473

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TIMING CHAIN

7. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica-

tion notch (without paint mark) with the timing indicator on the

front cover. 

b. At this time, make sure both intake and exhaust cam lobes of

No. 1 cylinder (top front on LH bank) point outside.

• If they do not point outside, turn crankshaft pulley once more.

8. Remove the crankshaft pulley.
a. Loosen the crankshaft pulley bolts using a hammer handle to

secure the crankshaft.

b. Remove the crankshaft pulley from the crankshaft using tool.

• Remove the crankshaft pulley using suitable tool. Set the bolts

in the two bolt holes [M6 x 1.0 mm (0.04 in)] on the front sur-

face.

NOTE:

The dimension between the centers of the two bolt holes is 61

mm (2.40 in).

9. Remove the front cover.
a. Loosen and remove the bolts in the reverse of order shown.
b. Cut the liquid gasket and remove the covers using Tool.

CAUTION:

Do not damage mating surfaces.

10. Remove the front oil seal using suitable tool.

CAUTION:

Do not damage front cover.

KBIA2476E

KBIA0400J

PBIC0053E

KBIA2477E

Tool number

: KV10111100 (J-37228)

KBIA2478E

TIMING CHAIN

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11. Remove the oil pump drive spacer.

• Hold and remove the flat space of the oil pump drive spacer by

pulling it forward. 

12. Remove the oil pump. Refer to 

LU-14, "Removal and Installation"

.

13. Remove the chain tensioner on the LH bank using the following steps.

NOTE:

To remove the timing chain and associated parts, start with those on the LH bank. The procedure for

removing parts on the RH bank is omitted because it is the same as that for the LH bank. 

a. Squeeze the return-proof clip ends using suitable tool and push

the plunger into the tensioner body.

b. Secure the plunger using stopper pin.

• Stopper pin is made from hard wire approximately 1 mm (0.04

in) in diameter.

c. Remove the bolts and chain tensioner.

WARNING:

Plunger, spring, and spring seat pop out when (squeezing)

return-proof clip without holding plunger head. It may

cause serious injuries. Always hold plunger head when

removing.

NOTE:

• Stop the plunger in the fully extended position by using the

return-proof clip (1) if the stopper pin is removed.

• Push the plunger (2) into the tensioner body while squeezing

the return-proof clip (1). Secure it using stopper pin (3).

14. Remove the timing chain tension guide and timing chain slack guide.
15. Remove the timing chain and crankshaft sprocket.
16. Loosen the camshaft sprocket bolts as shown and remove the

camshaft sprocket.

CAUTION:

To avoid interference between valves and pistons, do not

turn crankshaft or camshaft when timing chain is discon-

nected.

17. Repeat the same procedure to remove the RH timing chain and

associated parts.

INSPECTION AFTER REMOVAL

KBIA2512E

KBIA2479E

KBIA2483E

WBIA0799E

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TIMING CHAIN

Check for cracks and any excessive wear at link plates. Replace

chain if necessary.

• In the same way as for the LH bank, inspect the timing chain and

associated parts on the RH bank.

INSTALLATION

NOTE:

• The above figure shows the relationship between the mating mark on each timing chain and that of the cor-

responding sprocket, with the components installed.

• To install the timing chain and associated parts, start with those on the RH bank. The procedure for installing

parts on the LH bank is omitted because it is the same as that for installation on the RH bank.

PBIC0282E

1.

Camshaft sprocket RH bank INT 
(VTC) 

2.

Camshaft sprocket RH bank EXH

3.

Camshaft dowel pin RH bank

4.

Timing chain RH bank

5.

Timing chain slack guide RH bank

6.

Chain tensioner RH

7.

Crankshaft sprockets

8.

Crankshaft key

9.

Timing chain tension guide LH bank

10. Timing chain LH bank

11. Camshaft dowel pin LH bank 

12. Camshaft sprocket LH bank EXH

13. Camshaft sprocket LH bank INT 

(VTC)

14. Chain tensioner LH

15. Timing chain tension guide RH bank

16. Timing chain slack guide LH bank

A.

LH bank

B.

RH bank

C.

Alignment mark (Link color: copper) D.

Alignment mark (Link color: copper) E.

Alignment mark (Identification mark)

F.

Alignment mark for LH bank (Notch) G.

Alignment mark for LH bank (Link 
color: zinc yellow)

H.

Alignment mark for RH bank (Link 
color: zinc yellow)

J.

Alignment mark (Link color: copper) K.

Alignment mark (Identification mark) L.

Alignment mark (Identification mark)

M

Alignment mark (Link color: copper) N.

Alignment mark (Identification mark)

AWBIA0150ZZ

TIMING CHAIN

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1. Make sure the crankshaft key and camshaft dowel pin RH bank

and camshaft dowel pin LH bank are facing in the direction

shown.

2. Install the camshaft sprockets.

• Install the camshaft sprocket INT (VTC) (A) and camshaft

sprockets EXH (B) by selectively using the groove of the

dowel pin according to the bank. (Common part used for both

exhaust banks.) 

NOTE:

Use the groove marked "R" for RH bank and "L" for LH bank.

• Lock the hexagonal part of the camshaft in the same way as

for removal, and tighten the bolts.

3. Install the crankshaft sprockets for both banks.

• Install LH bank crankshaft sprocket (B) and RH bank crank-

shaft sprocket (C) so that their flange side (A) (the larger diam-

eter side without teeth) faces in the direction shown.

NOTE:

The same parts are used but facing directions are different.

4. Install the timing chains and associated parts.

• Align the alignment mark on each sprocket and the timing chain for installation.

CAUTION:

• Before installing timing chain tensioner, it is possible to change the position of alignment mark

on timing chain and each sprocket. After the alignment marks are aligned, keep them aligned

by holding them by hand.

• Install the slack guides and tension guides onto the correct side by checking the identification mark on

the surface.

• Install the chain tensioner with the plunger locked in with the stopper pin.

CAUTION:

• Before and after the installation of the timing chain tensioner, make sure that the alignment

mark on the timing chain is not out of alignment.

• After installing the timing chain tensioner, remove the stopper pin to release the tensioner.

Make sure the tensioner is released.

• To avoid chain-link skipping of the timing chain, do not move crankshaft or camshafts until the

front cover is installed.

5. In the same way as for the RH bank, install the timing chain and associated parts on the LH bank.
6. Install the oil pump. 

SBIA0356E

AWBIA0151ZZ

WBIA0701E