Infiniti FX35 / FX45. Manual - part 638

TIMING CHAIN

EM-69

< SERVICE INFORMATION >

[VQ35DE]

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29. Remove internal chain guide, tension guide and slack guide.

NOTE:
Tension guide can be removed after removing timing chain (pri-
mary).

30. Remove timing chain (primary) and crankshaft sprocket.

CAUTION:

After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves
will strike the piston heads.

31. Remove timing chain (secondary) and camshaft sprockets as follows:

a.

Attach suitable stopper pin to the right and left timing chain ten-
sioners (secondary).
NOTE:
• Use approximately 0.5 mm (0.020 in) dia. hard metal pin as a

stopper pin.

• For removal of timing chain tensioner (secondary), refer to

EM-83, "Component"

. [Removing camshaft bracket (No. 1) is

required.]

b.

Remove camshaft sprocket (INT and EXH) mounting bolts.
• Secure the hexagonal portion of camshaft using a wrench to

loosen mounting bolts.

CAUTION:

Do not loosen the mounting bolts with securing anything
other than the camshaft hexagonal portion or with ten-
sioning the timing chain.

c.

Remove timing chain (secondary) together with camshaft sprockets.
• Turn camshaft slightly to secure slackness of timing chain on timing chain tensioner (secondary) side.

PBIC2266E

PBIC2047E

KBIA1698J

EM-70

< SERVICE INFORMATION >

[VQ35DE]

TIMING CHAIN

• Insert 0.5 mm (0.020 in)-thick metal or resin plate between tim-

ing chain and timing chain tensioner plunger (guide). Remove
timing chain (secondary) together with camshaft sprockets
with timing chain loose from guide groove.

CAUTION:

Be careful of plunger coming-off when removing timing
chain (secondary). This is because plunger of timing
chain tensioner (secondary) moves during operation,
leading to coming-off of fixed stopper pin. 
NOTE:
Camshaft sprocket (INT) is two-for-one structure of primary
and secondary sprockets.

• When handling camshaft sprocket (INT), be careful of the fol-

lowing caution:

CAUTION:

• Handle carefully to avoid any shock to camshaft

sprocket.

• Do not disassemble. (Do not loosen bolts “A” as shown

in the figure).

32. Remove rear timing chain case as follows:
a.

Loosen and remove mounting bolts in reverse order as shown in
the figure.

b.

Cut liquid gasket using the seal cutter [SST: KV10111100
(J37228)]  and remove rear timing chain case.

CAUTION:

• Do not remove plate metal cover of oil passage.
• After removal, handle rear timing chain case carefully so

it does not tilt, cant, or warp under a load.

PBIC1978E

PBIC2980E

SEM735G

KBIA1307E

TIMING CHAIN

EM-71

< SERVICE INFORMATION >

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33. Remove O-rings from cylinder head.

34. Remove O-rings from cylinder block.

35. Remove timing chain tensioners (secondary) from cylinder head as follows, if necessary.

a.

Remove camshaft brackets (No. 1). Refer to 

EM-84, "Removal and Installation"

.

b.

Remove timing chain tensioners (secondary) with a stopper pin attached.

36. Use a scraper to remove all traces of liquid gasket from front

and rear timing chain cases, and opposite mating surfaces.

• Remove old liquid gasket from the bolt hole and thread.

SBIA0496E

PBIC0788E

SEM737G

PBIC2084E

EM-72

< SERVICE INFORMATION >

[VQ35DE]

TIMING CHAIN

37. Use a scraper to remove all traces of liquid gasket from water

pump cover, chain tensioner cover and intake valve timing con-
trol covers.

INSPECTION AFTER REMOVAL

Timing Chain

Check for cracks and any excessive wear at link plates and roller
links of timing chain. Replace timing chain as necessary.

INSTALLATION

NOTE:
The below figure 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 as follows if removed. Refer to 

EM-84,

"Removal and Installation"

.

a.

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

b.

Install camshaft brackets (No. 1). Refer to 

EM-84, "Removal and Installation"

.

SEM926E

PBIC0282E

PBIC4662E