Infiniti F50. Manual — part 537
TIMING CHAIN
EM-35
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TIMING CHAIN
PFP:13028
Removal and Installation
EBS00JX6
SBIA0371E
EM-36
TIMING CHAIN
CAUTION:
Apply new engine oil to parts marked in illustration before installation.
REMOVAL
1.
Remove engine assembly from vehicle. Refer to
EM-70, "Removal and Installation"
2.
Remove the following components and related parts:
●
Drive belt auto tensioner and idler pulley. Refer to
EM-14, "Drive Belt Auto Tensioner and Idler Pulley"
●
Thermostat housing and hose. Refer to
CO-24, "Removal and Installation"
●
Oil pan and oil strainer. Refer to
EM-25, "Removal and Installation"
●
Ignition coil (When camshaft sprocket is removed). Refer to
EM-28, "Removal and Installation"
●
Rocker cover (When camshaft sprocket is removed). Refer to
EM-33, "Removal and Installation"
.
3.
If necessary, remove intake valve timing control position sensor
(right and left) and camshaft position sensor (PHASE) from
intake valve timing control cover and front cover.
CAUTION:
●
Handle components and parts carefully to avoid dropping
and shocks.
●
Do not disassemble.
4.
If necessary, remove intake valve timing control solenoid valve
from intake valve timing control cover.
CAUTION:
●
Handle components and parts carefully to avoid dropping
and shocks.
●
Do not disassemble.
1.
Camshaft sprocket (left bank EXH)
2.
Camshaft sprocket (left bank INT)
3.
Camshaft sprocket (right bank INT)
4.
Camshaft sprocket (right bank EXH)
5.
Front cover
6.
Intake valve timing control solenoid
valve (right bank)
7.
O-ring
8.
Seal ring
9.
Intake valve timing control position
sensor (right bank)
10. O-ring
11.
Intake valve timing control cover
(right bank)
12.
Intake valve timing control position
sensor (left bank)
13. O-ring
14.
Intake valve timing control cover (left
bank)
15. Seal ring
16.
Intake valve timing control solenoid
valve (left bank)
17. O-ring
18. Oil level gauge
19. Oil level gauge guide
20. O-ring
21. Crankshaft pulley bolt
22. Crankshaft pulley
23. Front oil seal
24. Chain tensioner cover
25. Camshaft position sensor (PHASE)
26. O-ring
27. Oil pump drive spacer
28. Oil pump assembly
29. Crankshaft sprocket
30. O-ring
31. O-ring
32.
Timing chain tension guide
(right bank)
33.
Timing chain slack guide
(right bank)
34. Timing chain (right bank)
35. Timing chain (left bank)
36. Chain tensioner (left bank)
37. Chain tensioner (right bank)
38.
Timing chain slack guide
(left bank)
39.
Timing chain tension guide
(right bank)
40. O-ring
PBIC0050E
TIMING CHAIN
EM-37
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5.
Remove intake valve timing control cover as follows:
a.
Loosen and remove fixing bolts in the reverse order of that
shown in figure.
b.
Use seal cutter or the equivalent to cut liquid gasket for removal.
CAUTION:
●
Exercise care not to damage mating surfaces.
●
Pull out cover keeping levelness without an angle, as
inner part of cover is engaged with the center of intake
cam sprocket.
6.
Obtain compression TDC of No. 1 cylinder as follows:
a.
Turn crankshaft pulley clockwise to align the TDC identification
notch (without paint mark) with timing indicator on front cover.
b.
At this time, check that the mating mark on camshaft sprocket is
in the position as shown in the figure.
●
If the mating mark does not come in the position shown, turn
crankshaft pulley once more to bring the mark in the position.
7.
Remove crankshaft pulley as follows:
a.
Lock crankshaft with a hammer handle or similar tool to loosen
fixing bolts.
b.
Pull crankshaft pulley with both hands to remove it.
CAUTION:
●
Do not remove fixing bolts. Keep loosened fixing bolts in
place to protect removed crankshaft pulley from drop-
ping.
●
Do not remove balance weight (inner hexagon bolt) at the
front of crankshaft pulley.
PBIC0051E
PBIC0044E
PBIC0052E
PBIC0053E
EM-38
TIMING CHAIN
8.
Remove front cover as follows:
a.
Loosen and remove fixing bolts in the reverse order of that
shown in figure.
b.
Use seal cutter or the equivalent to cut liquid gasket for removal.
CAUTION:
Exercise care not to damage mating surfaces.
9.
If replacement of front oil seal is necessary, lift the seal with a
screwdriver for removal.
CAUTION:
Exercise care not to damage front cover.
10. Remove oil pump drive spacer.
●
Install bolts into two bolt holes [M6 x pitch 1.0 mm (0.04 in)]
on front surface. Using a small puller, pull spacer off from
crankshaft.
NOTE:
The center-to-center dimension between the two bolt holes is 33
mm (1.30 in).
11. Remove oil pump. Refer to
12. Remove chain tensioner on left bank.
NOTE:
To remove timing chain and associated parts, start with those on
left bank. The procedure for removing parts on right bank is omitted because it is the same as that for left
bank.
a.
Press tab in the direction of arrow (or turn lever in the direction
of arrow) to unlock the locking with the groove that stops ten-
sioner plunger from returning.
●
Lightly press tensioner plunger to release the tension of
spring for this operation.
b.
Push in tensioner plunger to align the hole on lever and that on
pump main body.
●
Pushing in tensioner too far does not allow the holes to align.
Therefore, push in plunger to the degree at which the start of
stopper groove and tab engages.
c.
Insert a stopper pin [hard wire with approx. 0.5 mm (0.020 in)
diameter or a similar tool] to fix plunger. With plunger fixed, remove chain tensioner.
13. Remove chain tensioner guide and slack guide.
14. Remove timing chain and crankshaft sprocket.
15. With hexagonal part of camshaft locked with wrench, loosen
bolts securing camshaft sprocket to remove camshaft sprocket.
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft with timing chain is discon-
nected.
16. Using the same procedure as for left bank, remove timing chain
and associated parts on right side.
KBIA0354J
PBIC0054E
PBIC0055E
PBIC0030E
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