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
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
I
J
K
L
M
A
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
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
●
Check when the engine is cold so as to prevent burns from any splashing engine oil.
1.
Check the engine oil level. Refer to
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст