Infiniti Q45. Manual - part 559

 

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Infiniti Q45. Manual - part 559

 

 

CAMSHAFT

EM-53

C

D

E

F

G

H

I

J

K

L

M

A

EM

Measure the following parts if out of the standard.

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

1.

Put V-block on precise flat table, and support No. 2 and No. 5 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
four locations.

2.

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

If it exceeds the limit, replace camshaft sprocket.

Valve Lifter and Adjusting Shim

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

If anything above is found, replace valve lifter or adjusting shim. 

When replacing adjusting shim. Refer to 

EM-57, "Valve Clear-

ance"

 .

Valve Lifter Clearance

VALVE LIFTER OUTER DIAMETER

Measure outer diameter of valve lifter with a micrometer.

Standard

: 30.500 - 30.548 mm (1.2008 - 1.2027 in)

Standard

: 30.360 - 30.385 mm (1.1953 - 1.1963 in)

KBIA2426J

Limit

: 0.15 mm (0.0059 in)

PBIC0930E

PBIC0231E

Standard: 33.965 - 33.975 mm (1.3372 - 1.3376 in)

SEM961E

EM-54

CAMSHAFT

VALVE LIFTER HOLE DIAMETER

Measure 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 out of the standard, referring to each standard of valve lifter outer diameter and valve lifter hole diame-
ter, replace either or both valve lifter and cylinder head.

INSTALLATION

1.

Install adjusting shims and valve lifters if necessary.

Install removed parts in the same locations as before.

2.

Install camshafts. Refer to the table below for identification of
right and left bank, and intake and exhaust.

Install so that dowel pin at the front of camshaft face is in the
direction shown in the figure. (No.1 cylinder at compression
TDC)

Standard:

34.000 - 34.016 mm (1.3386 - 1.3392 in)

PBIC0043E

Standard:

0.025 - 0.051 mm (0.0010 - 0.0020 in)

Bank

INT/EXH

Identifica-

tion paint 

(front)

Identifica-

tion paint 

(rear)

Identifica-

tion rib

Inscribed 

symbol

Left

INT

Blue

No

LH

EXH

Orange

No

LH

Right

INT

Blue

Yes

RH

EXH

Orange

Yes

RH

Camshaft dowel pin

: At cylinder head upper face side in each bank

PBIC0032E

SBIA0366E

CAMSHAFT

EM-55

C

D

E

F

G

H

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EM

3.

Install camshaft brackets as follows:

Remove foreign material completely from camshaft bracket
backside and from cylinder head installation face.

Install by referring to installation location mark on upper sur-
face and front mark.

Install so that installation location mark can be correctly read
when viewed from the side of left exhaust bank.

Apply liquid gasket to camshaft bracket (No.1) as in the fig-
ure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-45, "RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS"

 .

CAUTION:

After installation, be sure to wipe off any excessive liq-
uid gasket leaking from part “A” and “B”(both on right
and left sides).

Remove completely any excess of liquid gasket inside
bracket. 

Apply liquid gasket to camshaft bracket (INT,No.6) on left
bank intake as in the illustration.

CAUTION:

After installation, be sure to wipe off any excessive liq-
uid gasket leaking from part “A”, and “ B”(both on
right and left sides).

Remove completely any excess of liquid gasket inside
bracket. 

PBIC0034E

PBIC2356E

PBIC2357E

EM-56

CAMSHAFT

4.

Tighten camshaft bracket bolts in the following steps, in numeri-
cal order as shown in the figure.

a.

Tighten No. 9 to 12 in numerical order as shown.

b.

Tighten No. 1 to 8 in numerical order as shown.

c.

Tighten No. 13 to 14 in numerical order as shown. (Left bank
only)

d.

Tighten all bolts in numerical order as shown.

e.

Tighten No. 1 to 12 in numerical order as shown.

f.

Tighten No. 13 to 14 in numerical order as shown. (Left bank
only)

CAUTION:

After tightening mounting bolts of camshaft brackets, be sure to wipe off excessive liquid gasket
from the parts listed below. 

Mating surface of rocker cover 

Mating surface of camshaft bracket (INT,No.6) on left bank.

Mating surface of front cover

5.

Install camshaft sprockets.

Install by checking with identification mark on surface.

Install camshaft sprocket (EXH) by selectively using the
groove of dowel pin according to the bank. (Common part
used for both banks.)

Lock the hexagonal part of camshaft in the same way as for
removal, and tighten mounting bolts.

6.

Check and adjust valve clearances. Refer to 

EM-57, "Valve Clearance"

 .

7.

Install in the reverse order of removal.

INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT) Oil Groove

CAUTION:

Perform this inspection only when DTC P0011 and/or P0021 are detected in self-diagnostic results
of CONSULT-II and it is directed according to inspection procedure of EC section. Refer to 

EC-82,

"TROUBLE DIAGNOSIS"

  .

Check when the engine is cold so as to prevent burns from any splashing engine oil.

1.

Check the engine oil level. Refer to 

LU-6, "ENGINE OIL"

  .

2.

Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.

a.

Release fuel pressure. Refer to 

EC-80, "FUEL PRESSURE RELEASE"

  .

b.

Disconnect ignition coil and injector harness connectors.

: 2.0 N·m (0.2 kg-m, 1 ft-lb)

: 2.0 N·m (0.2 kg-m, 1 ft-lb)

: 2.0 N·m (0.2 kg-m, 1 ft-lb)

: 5.9 N·m (0.6 kg-m, 4 ft-lb)

: 10.4 N·m (1.1 kg-m, 8 ft-lb)

: 31.4 N·m (3.2 kg-m, 23 ft-lb)

PBIC0031E

PBIC2345E

 

 

 

 

 

 

 

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