Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1997 1997 Service Manual ENGINE SECTION ENGINE (SOHC) MSA5TCD97L3457

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SERVICE PROCEDURE 2-3
4. Valve Rocker Assembly

4. Valve Rocker Assembly
A: REMOVAL

B2M1206A

1) Disconnect PCV hose and remove rocker cover.
2) Removal of valve rocker assembly
(1) Remove bolts k through k in numerical sequence.
1 4
CAUTION:
Leave two or three threads of bolt k engaged to retain
1
valve rocker assembly.
(2) Equally loosen bolts k through k all the way, being
5 8
careful that knock pin is not gouged.
B2M1207A (3) Remove valve rocker assembly.

27
2-3 SERVICE PROCEDURE
4. Valve Rocker Assembly

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.

28
SERVICE PROCEDURE 2-3
4. Valve Rocker Assembly

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 using a 2 mm
(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
G2M0131
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.

29
2-3 SERVICE PROCEDURE
4. Valve Rocker Assembly

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)
B2M0072
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
B2M0073 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.

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