Nissan Primera P11. Instruction — part 420
3.
Install new oil seals with a suitable tool.
Confirm turning direction of both oil seals and camshaft.
CRANKSHAFT FRONT OIL SEAL
1.
Remove valve timing belt and crankshaft sprocket.
2.
Remove oil seal with a suitable tool.
3.
Apply engine oil to new oil seal and install oil seal using a
suitable tool.
CRANKSHAFT REAR OIL SEAL
1.
Remove transaxle assembly. (Refer to “REMOVAL AND
INSTALLATION” in MT section.)
2.
Remove flywheel.
3.
Remove rear oil seal with a suitable tool.
1.
Apply engine oil to new oil seal and install oil seal using a
suitable tool.
SEM240D
Rear
Front
SEM889
SEM241D
SEM891
SEM242D
OIL SEAL REPLACEMENT
CD20T
EM-139
Components
p
1
Camshaft
p
2
Front oil seal
p
3
Collar
p
4
Grommet
p
5
Front back cover
p
6
Front camshaft sprocket plate
p
7
Front camshaft sprocket
p
8
Spring
p
9
Selective cylinder head gasket
p
10
Valve
p
11
Spring seat
p
12
Valve spring
p
13
Valve oil seal
p
14
Spring retainer (INT)/Valve rotator
(EXH)
p
15
Valve cotter
p
16
Valve lifter with shim
p
17
Rear back cover
p
18
Rear camshaft sprocket
p
19
Grommet
p
20
Collar
p
21
Rocker cover gasket
p
22
Cam bracket
p
23
Rear oil seal
SEM356F
CYLINDER HEAD
CD20T
Components
EM-140
Removal
1.
Drain coolant and disconnect front exhaust pipe from manifold.
2.
Remove water hoses, air duct and intake manifold.
3.
Remove heat shield and exhaust manifold.
4.
Remove rocker cover and injection tubes.
5.
Remove both timing belts.
Set No. 1 cylinder at TDC on its compression stroke. Refer to
“TIMING BELT” (EM-134).
After timing belts have been removed, do not rotate crankshaft
and/or camshaft separately as valves will hit piston heads.
6.
Remove cylinder head bolts in numerical order as shown in the
figure.
Disassembly
1.
Remove front camshaft sprocket plate, front and rear sprock-
ets using special service tool or a suitable tool, and front back
cover.
2.
Remove camshaft brackets in order from outside to inside.
I
Loosen camshaft bracket nuts in two or three stages.
3.
Remove camshaft and oil seals.
4.
Remove valve lifters.
For valve lifter
I
Attach tags to valve lifters for identification.
5.
Remove valve component parts using special service tool or a
suitable tool.
I
Keep each valve and its components together and mark
them so they can be reassembled in their original posi-
tions.
6.
Remove valve oil seals using special tool.
SEM373D
Drain plug
(cylinder block)
SEM682D
SEM864
SEM716B
SEM745BA
CYLINDER HEAD
CD20T
Removal
EM-141
Inspection
CYLINDER HEAD DISTORTION
1.
Visually check for cracks and deformation.
2.
Check cylinder head for distortion.
Head surface flatness:
Less than 0.1 mm (0.004 in)
If beyond the specified limit, replace or resurface cylinder
head.
Resurfacing limit:
The resurfacing limit of the cylinder head is related to the
amount of resurfacing of the cylinder block.
When:
“A” is the amount of resurfacing needed for the cylinder head
and “B” is the amount of resurfacing needed for the cylinder
block, the maximum limit is determined by
A + B = 0.1 mm (0.004 in)
After resurfacing cylinder head, check that camshaft rotates freely
by hand. If resistance is felt, the cylinder head must be replaced.
Nominal height of cylinder head:
137.9 - 138.1 mm (5.429 - 5.437 in)
VALVE GUIDE CLEARANCE
1.
Measure deflection across the cylinder head as illustrated.
Valve deflection limit (dial gauge reading):
0.1 mm (0.004 in)
2.
If exceeding the limit, check valve-to-guide clearance.
a)
Measure valve stem diameter and valve guide inner diameter
as illustrated.
b)
Check that clearance is within the specification.
Valve stem to valve guide clearance limit:
0.1 mm (0.004 in)
c)
If exceeding the limit, replace valve or valve guide.
VALVE GUIDE REPLACEMENT
1.
Heat cylinder head in oil to 150 to 160°C (302 to 320°F).
2.
Drive out valve guide using a press or hammer and a suitable
tool.
SEM595A
Warpage of surface:
Less than 0.1 mm (0.004 in)
SEM870
SEM244D
Micrometer
Top
Center
Bottom
Valve guide
Valve
SEM871
CYLINDER HEAD
CD20T
Inspection
EM-142
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст