Subaru Legacy III (2000-2003 year). Manual - part 414

 

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Subaru Legacy III (2000-2003 year). Manual - part 414

 

 

ME(H4DOSTC)-20

MECHANICAL

GENERAL DESCRIPTION

2. GENERAL PURPOSE TOOLS

E: PROCEDURE

It is possible to conduct the following service procedures with engine on the vehicle, however, the procedures
described in this section are based on the condition that the engine is removed from the vehicle.
• V-belt
• Timing Belt
• Camshaft
• Cylinder Head

498277200

STOPPER SET

Used for installing automatic transmission assem-
bly to engine.

24082AA210

(Newly adopted 

tool)

CARTRIDGE

Troubleshooting for electrical systems.

22771AA030

SELECT MONI-
TOR KIT

Troubleshooting for electrical systems.
• English: 22771AA030 (Without printer)
• German: 22771AA070 (Without printer)
• French: 22771AA080 (Without printer)
• Spanish: 22771AA090 (Without printer)

TOOL NAME

REMARKS

Compression Gauge

Used for measuring compression.

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

ST-498277200

ST24082AA210

ST22771AA030

ME(H4DOSTC)-21

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. <Ref. to
FU(H4DOSTC)-44, RELEASING OF FUEL PRES-
SURE, OPERATION, Fuel.>
4) Remove all the spark plugs. <Ref. to
IG(H4DOSTC)-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;7

1,079 — 1,275 kPa (11 — 13 kg/cm

2

, 155 — 

183 psi)

Limit;

951 kPa (10 kg/cm

2

, 138 psi)

Difference between cylinders;

49 kPa (0.5 kg/cm

2

, 7 psi)

ME-00007

ME(H4DOSTC)-22

MECHANICAL

IDLE SPEED

3. Idle Speed

A: INSPECTION

1. USING SUBARU SELECT MONITOR

1) Before checking the idle speed, check the fol-
lowing:

(1) Ensure the air cleaner element is free from
clogging, ignition timing is correct, spark plugs
are in good condition, and that the hoses are
connected properly.
(2) Ensure the malfunction indicator light
(CHECK ENGINE light) does not illuminate.

2) Warm-up the engine.
3) Stop the engine, and then turn the ignition switch
to OFF.
4) Insert the cartridge to SUBARU SELECT MONI-
TOR.
5) Connect the SUBARU SELECT MONITOR to
data link connector.
6) Turn the ignition switch to ON, and SUBARU
SELECT MONITOR switch to ON.
7) Select the {2. Each System Check} in Main
Menu.
8) Select the {Engine Control System} in Selection
Menu.
9) Select the {1. Current Data Display & Save} in
Engine Control System Diagnosis.
10) Select the {1.12 Data Display} in Data Display
Menu.
11) Start the engine, and then read the engine idle
speed.
12) 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 neutral]:

700 

±±±±

100 rpm  (MT vehicles)

650 

±±±±

100 rpm  (AT vehicles)

13)  Check the idle speed when loaded. (Turn the
air conditioning switch to “ON” and operate the
compressor for at least 1 minute before measure-
ment.)

Idle speed [A/C “ON”, no load and gears in neu-
tral]:

800 

±±±±

150 rpm (MT vehicles)

850 

±±±±

150 rpm (AT vehicles)

NOTE:
As idle speed is controlled by the automatic adjust-
ment type, it can not be adjusted manually. If the
idle speed is out of specifications, refer to General
On-board Diagnosis Table under “Engine Control
System”. <Ref. to EN(H4DOSTC)-2, Basic Diag-
nostic Procedure.>

ME(H4DOSTC)-23

MECHANICAL

IGNITION TIMING

4. Ignition Timing

A: INSPECTION

1. USING SUBARU SELECT MONITOR

1) Before checking the ignition timing speed, check
the following:

(1) Ensure the air cleaner element is free from
clogging, spark plugs are in good condition, and
that hoses are connected properly.
(2) Ensure the malfunction indicator light
(CHECK ENGINE light) does not illuminate.

2) Warm-up the engine.
3) Stop the engine, and then turn the ignition switch
to OFF.
4) Insert the cartridge to SUBARU SELECT MONI-
TOR.
5) Connect the SUBARU SELECT MONITOR to
data link connector.
6) Turn the ignition switch to ON, and SUBARU
SELECT MONITOR switch to ON.
7) Select the {2. Each System Check} in Main
Menu.
8) Select the {Engine Control System} in Selection
Menu.
9) Select the {1. Current Data Display & Save} in
Engine Control System Diagnosis.
10) Select the {1.12 Data Display} in Data Display
Menu.
11) Start the engine, at idle speed and check the ig-
nition timing.

Ignition timing [BTDC/rpm]:

14

±±±±

10

°°°°

/700

If the timing is not correct, check the ignition control
system. Refer to Engine Control System. <Ref. to
EN(H4DOSTC)-2, Basic Diagnostic Procedure.>

 

 

 

 

 

 

 

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