Infiniti I35 (A33). Manual — part 486
SEM915E
19. Remove crankshaft pulley with a suitable puller.
SEM728G
20. Remove intake valve timing control covers.
I
Loosen bolts in reverse order shown in the figure.
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In the cover, the shaft is engaged with the center hole of the
intake camshaft sprocket. Remove it straight out until the
engagement comes off.
21. Remove air conditioner compressor. Refer to HA-112,
“REMOVAL AND INSTALLATION”.
22. Remove front exhaust tube and its support. Refer to FE-9,
“EXHAUST SYSTEM”.
23. Hang engine at right and left side engine slingers with a suit-
able hoist. Refer to EM-69, “Removal and Installation”.
24. Remove right side engine mounting, mounting bracket and
nuts. Refer to EM-69, “Removal and Installation”.
25. Remove center member assembly.
26. Remove upper and lower oil pans. Refer to EM-14, “Removal”.
SEM730G
27. Loosen front timing chain case bolts in reverse order shown in
the figure.
SEM156F
28. Remove front timing chain case.
a.
Insert the appropriate size tool into the notch at the top of the
front timing chain case as shown (1).
b.
Pry off the case by moving the tool as shown (2).
I
Use seal cutter (special service tool) or an equivalent tool to
cut liquid gasket for removal.
CAUTION:
I
Do not use screwdrivers or something similar.
I
After removal, handle it carefully so it does not tilt, cant,
or warp under a load.
GI
MA
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TIMING CHAIN
Removal (Cont’d)
EM-35
29. Remove water pump cover and timing chain tensioner cover
from front timing chain case.
30. Remove front oil seal from front timing chain case.
Refer to EM-48, “FRONT OIL SEAL”.
SEM731G
31. Remove internal chain guide.
32. Remove timing chain tensioner and slack side chain guide.
SEM732G
SEM733G
I
Remove chain tensioner as follows.
a)
Pull lever down, and release plunger stopper tab.
I
Plunger stopper tab can be pushed up to release (coaxial
structure with lever).
b)
Insert stopper pin into tensioner body hole to fix lever, and
keep the tab released.
I
In figure, Allen wrench [2.5 mm (0.098 in)] is used for stopper
pin as an example.
c)
Insert plunger into tensioner body by pressing slack guide.
d)
Keep slack guide pressed, and fix it by pushing stopper pin
through lever hole and body hole.
e)
Loosen mounting bolts, and remove chain tensioner.
33. Remove primary timing chain and crankshaft sprocket.
TIMING CHAIN
Removal (Cont’d)
EM-36
SEM923G
34. Attach a suitable stopper pin to RH and LH camshaft chain
tensioners. (For secondary timing chains)
KBIA1698J
35. Loosen intake and exhaust camshaft sprocket bolts.
I
Secure the hexagonal portion of the camshaft using a
spanner to loosen mounting bolts.
SEM922G
36. Remove secondary timing chains with camshaft sprockets.
a.
Rotate camshaft lightly, and slacken timing chain of timing
chain tensioner-side.
b.
Insert metal or resin plate [thickness: 0.5 mm (0.020 in)] into
guide between timing chain and chain tensioner plunger.
Remove cam sprocket and secondary timing chain with timing
chain floated from guide groove.
CAUTION:
Chain tensioner plunger may move, while fixed stopper pin
and plunger both come off when timing chain is removed. Use
caution during removal.
SEM734G
I
Intake camshaft sprocket is two-for-one structure of primary
and secondary sprockets.
I
Handle intake camshaft sprocket, taking care of the following.
CAUTION:
I
Avoid impact.
I
Do not disassemble (Never loosen bolts A and B).
SEM735G
37. Remove chain tension guide.
38. Remove rear timing chain case as follows.
a.
Loosen mounting bolts in reverse order shown in figure, and
remove them.
b.
Disconnect liquid gasket applied portion using seal cutter (spe-
cial service tool: KV10111100) or an equivalent tool. Then
remove rear timing chain case.
GI
MA
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TIMING CHAIN
Removal (Cont’d)
EM-37
KBIA1307E
CAUTION:
I
Do not remove plate metal cover of oil passage.
I
After removing chain case, do not apply any load which
affects flatness.
PBIC0788E
39. Remove O-rings from cylinder block.
40. Remove RH and LH camshaft chain tensioners from cylinder
head as follows, if necessary.
a.
Remove No. 1 camshaft brackets.
Refer to EM-51, “Removal”.
b.
Remove chain tensioners with stopper pin attached.
SEM737G
41. Use a scraper to remove all traces of liquid gasket from front
and rear timing chain cases, and opposite mating surfaces.
SEM161F
I
Remove old liquid gasket from the bolt hole and thread.
TIMING CHAIN
Removal (Cont’d)
EM-38
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