Infiniti G35 (V35) Sedan. Manual — part 617
CAMSHAFT
EM-67
< ON-VEHICLE REPAIR >
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E
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1.
Install timing chain tensioners (secondary) (1) on both sides of
cylinder head.
• Install timing chain tensioner with its stopper pin (C) attached.
• Install timing chain tensioner with sliding part facing downward
on right-side cylinder head, and with sliding part facing upward
on left-side cylinder head.
2.
Install valve lifter.
• Install it in the original position.
3.
Install camshafts.
• Follow your identification marks made during removal, or fol-
low the identification marks that are present on new camshafts
for proper placement and direction.
• Install camshaft so that dowel pin (A) on front end face are
positioned as shown in the figure. (No. 1 cylinder TDC on its
compression stroke)
NOTE:
Though camshaft does not stop at the portion as shown in the
figure, for the placement of cam nose, it is generally accepted
camshaft is placed for the same direction of the figure.
A
: Right bank
B
: Left bank
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: Engine front
Bank
INT/EXH
Dowel pin
(1)
Paint marks
Identification
mark (D)
M1 (E)
M2 (F)
M3 (C)
RH
EXH (B)
Yes
No
Green
Light
blue
1F
INT (A)
Yes
Green
No
Light
blue
1E
LH
INT (A)
Yes
Green
No
Light
blue
1G
EXH (B)
Yes
No
Green
Light
blue
1H
1
: Crankshaft key
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EM-68
< ON-VEHICLE REPAIR >
CAMSHAFT
4.
Install camshaft brackets.
• Remove foreign material completely from camshaft bracket
backside and from cylinder head installation face.
• Install camshaft bracket in original position and direction as
shown in figure.
• Install camshaft brackets (No. 2 to 4) aligning the stamp marks
(A) as shown in the figure.
NOTE:
There are no identification marks indicating left and right for
camshaft bracket (No. 1).
• Apply liquid gasket to mating surface of camshaft bracket (No.
1) as shown on both right and left banks.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-15, "Recommended Chemical Products and Sealants"
.
A
: No. 1
B
: No. 2
C
: No. 3
D
: No. 4
E
: Right camshaft bracket
F
: Exhaust side
G
: Intake side
H
: Left camshaft bracket
I
: Intake side
J
: Exhaust side
: Engine front
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B
: Right bank
C
: Left bank
: Engine front
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a
: 8.5 mm (0.335 in)
b
: 2 mm (0.08 in)
c
: Clearance 5 mm (0.20 in)
d
:
φ
2.5 mm (0.098 in)
JPBIA0255ZZ
CAMSHAFT
EM-69
< ON-VEHICLE REPAIR >
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5.
Tighten camshaft bracket bolts in the following steps, in numeri-
cal order as shown.
a.
Tighten No. 7 to 10 in numerical order as shown.
b.
Tighten No. 1 to 6 in numerical order as shown.
c.
Tighten No. 1 to 10 in numerical order as shown.
d.
Tighten No. 1 to 10 in numerical order as shown.
6.
Tighten camshaft sensor bracket bolts in numerical order as
shown in the figure.
NOTE:
The order of tightening bolts is the same for bank 1 and bank 2.
7.
Inspect and adjust the valve clearance. Refer to
EM-17, "Inspection and Adjustment"
.
8.
Install in the reverse order of removal after this step.
Inspection
INFOID:0000000000956261
INSPECTION AFTER REMOVAL
Camshaft Runout
1.
Put V-block on precise flat table, and support No. 2 and 4 jour-
nals of camshaft.
CAUTION:
Do not support No. 1 journal (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
2.
Set a dial indicator vertically to No. 3 journal.
3.
Turn camshaft to one direction with hands, and measure the
camshaft runout on a dial indicator. (Total indicator reading)
4.
If it exceeds the limit, replace camshaft.
Camshaft Cam Height
: Engine front
: 1.96 N·m (0.20 kg-m, 1 ft-lb)
: 1.96 N·m (0.20 kg-m, 1 ft-lb)
: 5.88 N·m (0.60 kg-m, 4 ft-lb)
: 10.4 N·m (1.1 kg-m, 8 ft-lb)
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: Engine front
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Standard & limit
: Refer to
PBIC0929E
EM-70
< ON-VEHICLE REPAIR >
CAMSHAFT
1.
Measure the camshaft cam height with a micrometer.
2.
If wear exceeds the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL DIAMETER
• Measure the outer diameter of camshaft journal with a micrometer
(A).
CAMSHAFT BRACKET INNER DIAMETER
• Tighten camshaft bracket bolt with the specified torque. Refer to “INSTALLATION” for the tightening proce-
dure.
• Measure inner diameter (A) of camshaft bracket with a bore gauge.
CAMSHAFT JOURNAL OIL CLEARANCE
• (Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal diameter).
• If the calculated value exceeds the limit, replace either or both camshaft and cylinder head.
NOTE:
Camshaft brackets cannot be replaced as single parts, because there are machined together with cylinder
head. Replace whole cylinder head assembly.
Camshaft End Play
Standard cam height
: Refer to
.
(Intake & exhaust)
Cam wear limit
: Refer to
.
EMQ0072D
Standard and limit
: Refer to
.
JPBIA0122ZZ
Standard
: Refer to
PBIC1645E
Standard and limit
: Refer to
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