2004 SUBARU FORESTER check engine

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

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

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

ME(H4SO)-29
MECHANICAL
Engine Oil Pressure
6. Engine Oil Pressure
A: INSPECTION
1) Disconnect the ground cable from battery.
2) Remove the generator from bracket. SC(H4SO)-15, REMOVAL, Generator.>
3) Disconnect the connector from oil pressure
switch.
4) Remove the oil pressure switch from cylinder
block. sure Switch.>
5) Connect the oil pressure gauge hose to cylinder
block.
6) Connect the battery ground cable to battery.
7) Start the engine, and then measure the oil pres-
sure.
Oil pressure:
Standard:
88 kPa (0.9 kg/cm
2, 13 psi) or more at 800 rpm
294 kPa (3.0 kg/cm2, 43 psi) or more at 5,000
rpmCAUTION:
 If the oil pressure is out of specification,
check the oil pump, oil filter and lubrication
line. gine Lubrication System Trouble in General.>
 If the oil pressure warning light is turned ON
and oil pressure is in specification, replace the
oil pressure switch. SPECTION, Engine Lubrication System Trouble
in General.>
NOTE:
The specified data is based on an engine oil tem-
perature of 80°C (176°F).
8) After measuring the oil pressure, install the oil
pressure switch. LATION, Oil Pressure Switch.>
Tightening torque:
25 N
⋅m (2.5 kgf-m, 18.1 ft-lb)
9) Install the generator and V-belt in the reverse or-
der of removal, and then adjust the V-belt deflec-
tion. belt.>
FU-00009
FU-00009
ME-00196

ME(H4SO)-30
MECHANICAL
Fuel Pressure
7. Fuel Pressure
A: INSPECTION
WARNING:
Before removing the fuel pressure gauge, re-
lease the fuel pressure.
NOTE:
If out of specification, check or replace the pressure
regulator and pressure regulator vacuum hose.
1) Release the fuel pressure. 47, RELEASING OF FUEL PRESSURE, OPERA-
TION, Fuel.>
2) Open the fuel flap lid, and then remove the fuel
filler cap.
3) Disconnect the fuel delivery hoses from fuel
damper, and then connect the fuel pressure gauge.
4) Connect the connector of fuel pump relay.
5) Start the engine.
6) Measure the fuel pressure while disconnecting
the pressure regulator vacuum hose from intake
manifold.Fuel pressure:
Standard:
284 — 314 kPa (2.9 — 3.2 kg/cm
2, 41 — 46 psi)
7) After connecting the pressure regulator vacuum
hose, measure the fuel pressure.
Fuel pressure:
Standard:
206 — 235 kPa (2.1 — 2.4 kg/cm
2, 30 — 34 psi)
NOTE:
The fuel pressure gauge registers 10 to 20 kPa (0.1
to 0.2 kg/cm
2, 1 to 3 psi) higher than standard val-
ues during high-altitude operations.
FU-00208
FU-00262
ME-00198
ME-00198

ME(H4SO)-37
MECHANICAL
Engine Assembly
18) Remove the pitching stopper.
19) Disconnect the fuel delivery hose (A), return
hose (B) and evaporation hose (C).
CAUTION:
 Disconnect the hose with its end wrapped
with cloth to prevent fuel from splashing.
 Catch fuel from the hose into container.
20) Support the engine with a lifting device and
wire ropes.21) Support the transmission with a garage jack.
CAUTION:
Before moving the engine away from transmis-
sion, check to be sure no work has been over-
looked. Doing this is very important in order to
facilitate re-installation and because the trans-
mission lowers under its own weight.
22) Separation of the engine and transmission.
(1) Remove the starter. REMOVAL, Starter.>
(2) Remove the bolts which hold upper side of
transmission to engine.
23) Install the ST to torque converter clutch case.
(AT model)
ST 498277200 STOPPER SET
24) Remove the engine from vehicle.
(1) Slightly raise the engine.
(2) Raise the transmission with garage jack.
ME-00213
FU-00149
(A)
(B)
(C)
ME-00214
(A) Transmission
(B) Garage jack
ME-00215
(B)(A)
ME-00216
ST
ME-00217

ME(H4SO)-40
MECHANICAL
Engine Assembly
11) Tighten the nuts which hold lower side of trans-
mission to engine.
Tightening torque:
50 N
⋅m (5.1 kgf-m, 36.9 ft-lb)
12) Tighten the nuts which install front cushion rub-
ber onto crossmember.
Tightening torque:
85 N
⋅m (8.7 kgf-m, 63 ft-lb)
NOTE:
Make sure the front cushion rubber mounting bolts
(A) and locator (B) are securely installed.
13) Install the front and center exhaust pipe. to EX(H4SO)-8, INSTALLATION, Front Exhaust
Pipe.>
14) Connect the following hoses.
(1) Fuel delivery hose, return hose and evapo-
ration hose
(2) Heater inlet and outlet hoses
(3) Brake booster vacuum hose
15) Connect the following connectors.
(1) Engine ground cables
Tightening torque:
14 N
⋅m (1.4 kgf-m, 10.1 ft-lb)
(2) Engine harness connectors
(3) Generator connector and terminal
(4) A/C compressor connectors
(5) Power steering pressure switch
16) Connect the following cables.
(1) Accelerator cable
(2) Cruise control cable (With cruise control)
17) Adjust each connected cable.18) Install the air cleaner case stay.
Tightening torque:
16 N
⋅m (1.6 kgf-m, 11.6 ft-lb)
19) Install the A/C pressure hoses. INSTALLATION, Hose and Tube.>
20) Install the radiator to vehicle. CO(H4SO)-30, INSTALLATION, Radiator.>
21) Install the air intake duct and air cleaner case.
Duct.> Cleaner Case.>
22) Install the under cover.
23) Install battery in the vehicle, and then connect
the cables.
24) Fill engine coolant.
COOLANT, REPLACEMENT, Engine Coolant.>
25) Check the ATF level and correct if necessary.
(AT model)
mission Fluid.>
26) Charge the A/C system with refrigerant. to AC-27, OPERATION, Refrigerant Charging Pro-
cedure.>
27) Remove the front hood stay, and then close the
front hood.
28) Take off the vehicle from lift arms.
C: INSPECTION
1) Make sure the pipes and hoses are installed cor-
rectly.
2) Make sure the engine coolant and ATF are at
specified levels.
ME-00219
ME-00056
(A)
(A)(B)
(B)

ME(H4SO)-46
MECHANICAL
Crank Pulley
(4) Tighten the crank pulley bolts.
Tightening torque:
177 N
⋅m (18.0 kgf-m, 130.2 ft-lb)
3) Confirm that the tightening angle of crank pulley
bolt is 65° or more. If the tightening angle of crank
pulley bolt is less than 65°, conduct the following
procedures.
(1) Replace the crank pulley bolts and clean
them.
Crank pulley bolt:
12369AA011
(2) Clean the crankshaft thread using an air
gun.
(3) Apply engine oil to the crank pulley bolt seat
and thread.
(4) Tighten the bolts temporarily with tightening
torque of 44 N⋅m (4.5 kgf-m, 33 ft-lb).
(5) Tighten the crank pulley bolts keeping them
in an angle between 65° and 75°.
NOTE:
Conduct the tightening procedures by confirming
the turning angle of crank pulley bolt referring to the
gauge indicated on belt cover.
4) Install the A/C belt tensioner.5) Install the A/C belt.
C: INSPECTION
1) Make sure the V-belt is not worn or otherwise
damaged.
2) Check the tension of the belt. ME(H4SO)-44, INSPECTION, V-belt.>ME-00227
STST
ME-00225
ME-00228