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4. Valve Rocker Assembly
A: REMOVAL
B2M1206A
B2M1207A
1) Disconnect PCV hose and remove rocker cover.
2) Removal of valve rocker assembly
(1) Remove bolts
1through4in numerical sequence.
CAUTION:
Leave two or three threads of bolt
1engaged to retain
valve rocker assembly.
(2) Equally loosen bolts
5through8all the way, being
careful that knock pin is not gouged.
(3) Remove valve rocker assembly.
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4. Valve Rocker Assembly
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B: DISASSEMBLY
B2M1264A
1) Remove bolts which secure rocker shaft.
2) Extract rocker shaft. Remove valve rocker arms,
springs and shaft supports from rocker shaft.
CAUTION:
Arrange all removed parts in order so that they can be
installed in their original positions.
3) Loosen rocker nut, and then remove rocker screw and
nut from rocker arm.
CAUTION:
Do not remove rocker screw and nut unless necessary.
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4. Valve Rocker Assembly
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G2M0131
C: INSPECTION
1. HYDRAULIC LASH ADJUSTER
1) Bleed air from hydraulic lash adjuster as described
below:
(1) While dipping hydraulic lash adjuster in engine oil,
as shown in Figure, push check ball in usinga2mm
(0.08 in) diameter round bar.
(2) With check ball pushed in, manually move plunger
up and down at one second intervals until air bubbles
disappear.
(3) After air bubbles disappear, remove round bar and
quickly push plunger in to ensure it is locked. If plunger
does not lock properly, replace hydraulic lash adjuster.
CAUTION:
Leave hydraulic lash adjuster (after air is bled) in
engine oil until it is ready for installation.
2) Replace hydraulic lash adjuster with a new one if valve
contact surface is scratched.
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4. Valve Rocker Assembly
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B2M0072
B2M0073
2. VALVE ROCKER ARM
1) Measure inside diameter of valve rocker arm and out-
side diameter of valve rocker shaft, and determine the dif-
ference between the two (= oil clearance).
Clearance between arm and shaft:
Standard
0.020—0.054 mm (0.0008—0.0021 in)
Limit
0.10 mm (0.0039 in)
If oil clearance exceeds specifications, replace valve
rocker arm or shaft.
NOTE:
Replace valve rocker arm or shaft, whichever shows
greater amount of wear.
Rocker arm inside diameter:
22.020—22.041 mm (0.8669—0.8678 in)
Rocker shaft diameter:
21.987—22.000 mm (0.8656—0.8661 in)
2) Measure inside diameter of rocker shaft support and
outside diameter of valve rocker shaft, and determine the
difference between the two (= oil clearance).
Clearance between support and shaft:
Standard
0.005—0.039 mm (0.0002—0.0015 in)
Limit
0.05 mm (0.0020 in)
If oil clearance exceeds specifications, replace rocker shaft
support or shaft.
NOTE:
Replace rocker shaft support or shaft, whichever shows
greater amount of wear.
Rocker shaft support inside diameter:
22.005—22.026 mm (0.8663—0.8672 in)
Rocker shaft diameter:
21.987—22.000 mm (0.8656—0.8661 in)
3) If cam or valve contact surface of valve rocker arm is
worn or dented excessively, replace valve rocker arm.
4) Check that valve rocker arm roller rotates smoothly. If
not, replace valve rocker arm.
3. VALVE ROCKER SHAFT
Visually check oil relief valve of shaft end for any of the
following abnormalities.
Breaks in check ball body
Foreign particles caught in valve spring
Oil leakage at check ball
CAUTION:
Repair or replace valve rocker shaft as necessary.
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D: ASSEMBLY
B2M1264B
Tightening torque: N⋅m (kg-m, ft-lb)
T: 5±1 (0.5±0.1, 3.6±0.7)
1) Install rocker adjust screw and nut to rocker arm, and
loosely tighten nut.
2) Arrange valve rocker arms, springs and shaft supports
in assembly order and insert valve rocker shaft. Ensure
that cutout portion of rocker shaft faces oil holes
Ain shaft
supports.
CAUTION:
Valve rocker arms, rocker shaft and shaft supports
have identification marks. Ensure parts with same
markings are properly assembled.
3) Install valve rocker shaft securing bolts while aligning
shaft“lock”holes
Bwith bolts.
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4. Valve Rocker Assembly
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E: INSTALLATION
B2M1206B
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 5±1 (0.5±0.1, 3.6±0.7)
T2: 12±1 (1.2±0.1, 8.7±0.7)
B2M1207B
1) Installation of valve rocker assembly
(1) Temporarily tighten bolts
1through4equally as
shown in Figure.
CAUTION:
Do not allow valve rocker assembly to gouge knock
pins.
(2) Tighten bolts
5through8to specified torque.
(3) Tighten bolts
1through4to specified torque.
2) Adjust the valve clearances.
3) Install rocker cover and connect PCV hose.
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5. Camshaft
A: REMOVAL
1. RELATED PARTS
1) Remove timing belt, camshaft sprockets and related
parts.
2) Remove valve rocker assembly.
2. CAMSHAFT LH
B2M0384A
1) Remove oil level gauge guide attaching bolt.
2) Remove camshaft support LH.
CAUTION:
Do not damage the camshaft position sensor.
3) Remove O-ring.
4) Remove camshaft LH.
5) Remove oil seal.
CAUTION:
Do not remove oil seal unless necessary.
Do not scratch journal surface when removing oil
seal.
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5. Camshaft
Page 296 of 3342
3. CAMSHAFT RH
B2M0385A
1) Remove camshaft support RH.
2) Remove O-ring.
3) Remove camshaft.
4) Remove oil seal.
CAUTION:
Do not remove oil seal unless necessary.
Do not scratch journal surface when removing oil
seal.
G2M0137
B: INSPECTION
1. CAMSHAFT
1) Measure the bend, and repair or replace if necessary.
Limit:
0.025 mm (0.0010 in)
2) Check journal for damage and wear. Replace if faulty.
3) Measure outside diameter of camshaft journal and
inside diameter of cylinder head journal, and determine the
difference between the two (= oil clearance). If oil clear-
ance exceeds specifications, replace camshaft or cylinder
head as necessary.
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5. Camshaft