Page 889 of 2870
ME(H4SO)-20
MECHANICAL
General Description
499587500 OIL SEAL
INSTALLERUsed for installing camshaft oil seal.
499587700 CAMSHAFT OIL
SEAL INSTALLERUsed for installing cylinder head plug.
499097700 PISTON PIN
REMOVER ASSYUsed for removing piston pin.
499207400 CAM SPROCKET
WRENCHUsed for removing and installing cam sprocket.
(RH side) ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST-499587500
ST-499587700
ST-499097700
ST-499207400
Page 890 of 2870
ME(H4SO)-21
MECHANICAL
General Description
499497000 TORX PLUS Used for removing and installing camshaft cap.
499587100 OIL SEAL
INSTALLERUsed for installing oil pump oil seal.
499597000 OIL SEAL GUIDE Used for installing camshaft oil seal.
Used with CAMSHAFT OIL SEAL INSTALLER
(499587500).
499597100 CRANKSHAFT OIL
SEAL GUIDE Used for installing crankshaft oil seal.
Used with CRANKSHAFT OIL SEAL
INSTALLER (499587200). ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST-499497000
ST-499587100
ST-499597000
ST-499597100
Page 891 of 2870
ME(H4SO)-22
MECHANICAL
General Description
499718000 VALVE SPRING
REMOVERUsed for removing and installing valve spring.
499767200 VALVE GUIDE
REMOVERUsed for removing valve guides.
499767400 VALVE GUIDE
REAMERUsed for reaming valve guides.
499767700
(Intake side)
499767800
(Exhaust side)VALVE GUIDE
ADJUSTERUsed for installing valve guides. ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST-499718000
ST-499767200
ST-499767400
ST-499767700
Page 892 of 2870
ME(H4SO)-23
MECHANICAL
General Description
2. GENERAL TOOL
499817100 ENGINE STAND Stand used for engine disassembly and
assembly.
Used with ENGINE STAND ADAPTER RH
(498457000) & LH (498457100).
499977100 CRANK PULLEY
WRENCHUsed for stopping rotation of crank pulley when
loosening and tightening crank pulley bolts. (2.5
L model)
499977400 CRANK PULLEY
WRENCHUsed for stopping rotation of crank pulley when
loosening and tightening crank pulley bolts. (2.0
L model)
499987500 CRANKSHAFT
SOCKETUsed for rotating crankshaft.
TOOL NAME REMARKS
Compression gauge Used for measuring compression.
Tachometer (secondary pick-up type) Used for measuring idle speed.
Timing light Used for measuring ignition timing.ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
ST-499817100
ST-499977100
ST-499977400
ST-499987500
Page 893 of 2870
ME(H4SO)-24
MECHANICAL
General Description
E: PROCEDURE
It is possible to conduct the following service proce-
dures with engine on the vehicle, however, the pro-
cedures described in this section are based on the
condition that the engine is removed from the vehi-
cle.
V-belt
Timing Belt
Valve Rocker Assembly
Camshaft
Cylinder Head
Page 894 of 2870

ME(H4SO)-25
MECHANICAL
Compression
2. Compression
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself during measure-
ment.
1) After warming-up the engine, turn the ignition
switch to OFF.
2) Make sure that the battery is fully charged.
3) Release the fuel pressure.
47, RELEASING OF FUEL PRESSURE, OPERA-
TION, Fuel.>
4) Remove all the spark plugs.
5, REMOVAL, Spark Plug.>
5) Fully open the throttle valve.
6) Check the starter motor for satisfactory perfor-
mance and operation.
7) Hold the compression gauge tight against spark
plug hole.
NOTE:
When using a screw-in type compression gauge,
the screw (put into cylinder head spark plug hole)
should be less than 18 mm (0.71 in) long.
8) Crank the engine by means of starter motor, and
then read the maximum value on the gauge when
the pointer is steady.
9) Perform at least two measurements per cylinder,
and make sure that the values are correct.
Compression (350 rpm and fully open throttle):
Standard;
1,275 kPa (13.0 kgf/cm
2, 185 psi)
Limit;
1,020 kPa (10.4 kgf/cm
2, 148 psi)
Difference between cylinders;
49 kPa (0.5 kgf/cm
2, 7 psi), or less
ME-00192
Page 895 of 2870

ME(H4SO)-26
MECHANICAL
Idle Speed
3. Idle Speed
A: INSPECTION
1) Before checking idle speed, check the following:
(1) Ensure the air cleaner element is free from
clogging, ignition timing is correct, spark plugs
are in good condition, and the hoses are con-
nected properly.
(2) Ensure the malfunction indicator light does
not illuminate.
2) Warm-up the engine.
3) Stop the engine, and then turn the ignition switch
to OFF.
4) When using the Subaru Select Monitor, refer to
the following.
TOOL, PREPARATION TOOL, General Descrip-
tion.>
(1) Insert the cartridge to Subaru Select Moni-
tor.
(2) Connect the Subaru Select Monitor to data
link connector.
(3) Turn the ignition switch to ON, and Subaru
Select Monitor switch to ON.
(4) Select the {Each System Check} in Main
Menu.
(5) Select the {Engine Control System} in Se-
lection Menu.
(6) Select the {Current Data Display & Save} in
Engine Control System Diagnosis.
(7) Select the {Data Display} in Data Display
Menu.
(8) Start the engine, and then read the engine
idle speed.
5) When using the tachometer (Secondary pick-up
type).
(1) Attach the pick-up clip to No. 1 cylinder
spark plug cord.(2) Start the engine, and then read the engine
idle speed.
NOTE:
When using the OBD-II general scan tool, care-
fully read its operation manual.
This ignition system provides simultaneous igni-
tion for #1 and #2 plugs. It must be noted that some
tachometers may register twice that of actual en-
gine speed.
6) Check the idle speed when unloaded. (With
headlights, heater fan, rear defroster, radiator fan,
air conditioning, etc. OFF)
Idle speed [No load and gears in “N” or “P”
range]:
650
±100 rpm
7) Check the idle speed when loaded. (Turn the air
conditioning switch to “ON” and operate the com-
pressor for at least 1 minute before measurement.)
Idle speed [A/C “ON”, no load and gears in “N”
or “P” range]:
850
±100 rpm
NOTE:
Idle speed can not be adjusted manually, because
the idle speed is automatically adjusted.
If the specified idle speed can not be maintained,
refer to General On-board Diagnosis Table under
“Engine Control System”.
Basic Diagnostics Procedure.>
ME-00325
ME-00193
Page 896 of 2870
ME(H4SO)-27
MECHANICAL
Ignition Timing
4. Ignition Timing
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself during measure-
ment.
1) Warm-up the engine.
2) To check the ignition timing, connect a timing
light to #1 cylinder spark plug cord, and illuminate
the timing mark with timing light.
3) Start the engine at idle speed and check the ig-
nition timing.
Ignition timing [BTDC/rpm]:
10
°±10°/650
If the timing is not correct, check the ignition control
system.
Procedure.>
ME-00194