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Infiniti G35 (V35). Manual - part 487

CAMSHAFT

EM-103

Camshaft Cam Height

Measure the camshaft cam height with a micrometer.

If wear is beyond the limit, replace camshaft.

Camshaft Journal Oil Clearance

CAMSHAFT JOURNAL DIAMETER

●

Measure the outer diameter of camshaft journal with microme-
ter.

CAMSHAFT BRACKET INNER DIAMETER

●

Tighten camshaft bracket bolt with the specified torque. Refer to

EM-105, "INSTALLATION"

for the tight-

ening procedure.

●

Measure the inner diameter “A” of camshaft bracket with bore
gauge.

CAMSHAFT JOURNAL OIL CLEARANCE

●

(Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal diameter).

●

If it exceeds the limit, replace either or both camshaft and cylinder head.

NOTE:
Camshaft brackets cannot be replaced as a single part, because it is machined together with cylinder
head. Replace whole cylinder head assembly.

Standard cam height:

M/T models

Intake

: 45.865 - 46.055 mm (1.8057 - 1.8132 in)

Exhaust

: 45.875 - 46.065 mm (1.8061 - 1.8136 in)

A/T models

Intake

: 44.865 - 45.055 mm (1.7663 - 1.7738 in)

Exhaust

: 44.865 - 45.055 mm (1.7663 - 1.7738 in)

Cam wear limit

: 0.2 mm (0.008 in)

EMQ0072D

Standard:

No. 1

: 25.935 - 25.955 mm (1.0211 - 1.0218 in)

No. 2, 3, 4

: 23.445 - 23.465 mm (0.9230 - 0.9238 in)

PBIC0040E

Standard:

No. 1

: 26.000 - 26.021 mm (1.0236 - 1.0244 in)

No. 2, 3, 4

: 23.500 - 23.521 mm (0.9252 - 0.9260 in)

PBIC1645E

Standard:

No. 1

: 0.045 - 0.086 mm (0.0018 - 0.0034 in)

No. 2, 3, 4

: 0.035 - 0.076 mm (0.0014 - 0.0030 in)

Limit

: 0.15 mm (0.0059 in)

EM-104

CAMSHAFT

Camshaft End Play

●

Install a dial indicator in thrust direction on front end of camshaft.
Measure the end play of a dial indicator when camshaft is
moved forward/backward (in direction to axis).

●

Measure the following parts if out of the limit.

–

Dimension “A” for camshaft No. 1 journal

–

Dimension “B” for cylinder head No. 1 journal

●

Refer to the standards above, and then replace camshaft and/or
cylinder head.

Camshaft Sprocket Runout

Put V-block on precise flat table, and support No. 2 and No. 4 journal of camshaft.

CAUTION:

Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter
from the other three locations.

Measure the camshaft sprocket runout with a dial indicator.
(Total indicator reading)

●

If it exceeds the limit, replace camshaft sprocket.

CAUTION:

When replacing camshaft sprocket (EXH), valve timing con-
trol cover (including magnet retarder cover). (M/T models)

Valve Lifter

Check if surface of valve lifter has any wear or cracks.

●

If anything above is found, replace valve lifter. Refer to

EM-170,

"Available Valve Lifter"

Standard

: 0.115 - 0.188 mm (0.0045 - 0.0074 in)

Limit

: 0.24 mm (0.0094 in)

SEM864E

Standard

: 27.500 - 27.548 mm (1.0827 - 1.0846 in)

Standard

: 27.360 - 27.385 mm (1.0772 - 1.0781 in)

KBIA2404J

Limit

: 0.15 mm (0.0059 in)

PBIC0930E

KBIA0182E

CAMSHAFT

EM-105

Valve Lifter Clearance

VALVE LIFTER OUTER DIAMETER

●

Measure the outer diameter at 1/2 height of valve lifter with a
micrometer since valve lifter is in barrel shape.

VALVE LIFTER HOLE DIAMETER

●

Measure the inner diameter of valve lifter hole of cylinder head
with an inside micrometer.

VALVE LIFTER CLEARANCE

●

(Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter)

●

If the calculated value is out of the standard, referring to each standard of valve lifter outer diameter and
valve lifter hole diameter, replace either or both valve lifter and cylinder head.

INSTALLATION

Install timing chain tensioners (secondary) on both sides of cyl-
inder head.

●

Install timing chain tensioner with its stopper pin attached.

●

Install timing chain tensioner with sliding part facing down-
ward on right-side cylinder head, and with sliding part facing
upward on left-side cylinder head.

●

Install new O-ring as shown in the figure.

Install valve lifter.

●

Install it in the original position.

Install camshafts. (A/T models)

Standard (Intake and exhaust)

: 33.977 - 33.987 mm (1.3377 - 1.3381 in)

JEM798G

Standard (Intake and exhaust)

: 34.000 - 34.016 mm (1.3386 - 1.3392 in)

SEM867E

Standard (Intake and exhaust)

: 0.013 - 0.039 mm (0.0005 - 0.0015 in)

PBIC2111E

EM-106

CAMSHAFT

●

Install camshaft with dowel pin attached to its front end face
on the exhaust side.

●

Follow your identification marks made during removal, or fol-
low the identification marks that are present on new cam-
shafts for proper placement and direction.

●

Install camshaft so that dowel pin hole and dowel pin on front
end face are positioned as shown in the figure. (No. 1 cylinder
TDC on its compression stroke)

NOTE:

●

Large and small pin holes are located on front end face of
camshaft (INT), at intervals of 180 degrees. Face small dia.
side pin hole upward (in cylinder head upper face direc-
tion).

●

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.

Install camshafts. (M/T models)

●

The distinguishing between intake and exhaust depends on
the difference of the shape (the number of the notch) of the
signal plate area on rear end of camshaft.

KBIA1071E

Bank

INT/EXH

Dowel pin

Paint marks

Identification

mark

INT

Pink

EXH

Yes

Orange

INT

Pink

EXH

Yes

Orange

KBIA1009E

PBIC2478E

Intake

: 6 notches

Exhaust

: 3 notches

PBIC3574E

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