2004 SUBARU FORESTER check engine

ME(H4SO)-65
MECHANICAL
Cylinder Head
(5) Compress the valve spring, and then fit the
valve spring retainer key.
(6) After installing, tap the valve spring retainers
lightly with plastic hammer for better seating.
E: INSPECTION
1. VALVE SPRING
1) Check the valve springs for damage, free length,
and tension. Replace the valve spring if it is not
within the standard value presented in the table.
2) To measure the squareness of valve spring,
stand the spring on a surface plate and measure its
deflection at the top using a try square.
2. INTAKE AND EXHAUST VALVE OIL
SEAL
In the following case, pinch and remove the oil seal
from valve using pliers, and then replace it with a
new one.
 When the lip is damaged.
 When the spring is out of the specified position. When readjusting the surfaces of intake valve
and valve sheet.
 When replacing the intake valve guide.
1) Place the cylinder head on ST1.
2) Using ST2, press-fit the oil seal.
CAUTION:
 Apply engine oil to oil seal before press-fit-
ting.
 When press-fitting oil seal, do not use ham-
mer or strike in.
 Differentiate between intake valve oil seal
and exhaust valve oil seal by noting their differ-
ence in color.
ST1 498267800 CYLINDER HEAD TABLE
ST2 498857100 VALVE OIL SEAL GUIDE
Color of rubber part:
Intake [Black]
Exhaust [Brown]
Color of spring part:
Intake [Silver]
Exhaust [Silver]
F: ADJUSTMENT
1. CYLINDER HEAD
1) Make sure that no crack or other damage exists.
In addition to visual inspection, inspect important
areas by means of red lead check.
Also make sure that gasket installing surface
shows no trace of gas and water leaks.
2) Place the cylinder head on ST.
ST 498267800 CYLINDER HEAD TABLE
3) Measure the warping of the cylinder head sur-
face that mates with crankcase using a straight
edge and thickness gauge.
If the warping exceeds the limit, regrind the surface
with a surface grinder.
Warping limit:
0.05 mm (0.0020 in)
Grinding limit:
0.1 mm (0.004 in)
Standard height of cylinder head:
97.5 mm (3.839 in)
(A) Retainer
(B) Valve spring
Free length 54.30 mm (2.1378 in)
Squareness 2.5°, 2.4 mm (0.094 in)
Tension/spring
height215 — 246 N
(21.9 — 25.1 kgf, 48.2 — 55.3 lb)/
45.0 mm (1.772 in)
527 — 582 N
(53.7 — 59.3 kgf, 118.1 — 130.8 lb)/
34.7 mm (1.366 in)
ME-00282
(B)(B)
(A)
ME-00283
ME-00284
ST1
ST2

ME(H4SO)-67
MECHANICAL
Cylinder Head
(2) Insert the ST2 into valve guide and press it
down to remove valve guide.
ST1 498267800 CYLINDER HEAD TABLE
ST2 499767200 VALVE GUIDE REMOVER
(3) Turn the cylinder head upside down and
place ST as shown in the figure.
Intake side:
ST 499767700 VALVE GUIDE ADJUSTER
Exhaust side:
ST 499767800 VALVE GUIDE ADJUSTER
(4) Before installing new oversize valve guide,
make sure that neither scratches nor damages
exist on the inside surface of valve guide holes
in cylinder head.
(5) Put new valve guide, coated with sufficient
oil, in the cylinder, and then insert the ST1 into
valve guide. Press in until the valve guide upper
end is flush with the upper surface of ST2.ST1 499767200 VALVE GUIDE REMOVER
Intake side:
ST2 499767700 VALVE GUIDE ADJUSTER
Exhaust side:
ST2 499767800 VALVE GUIDE ADJUSTER
(6) Check the valve guide protrusion.
Valve guide protrusion: L
Intake
20.0 — 20.5 mm (0.787 — 0.807 in)
Exhaust
16.5 — 17.0 mm (0.650 — 0.669 in)
(7) Ream the inside of valve guide with ST.
Gently rotate the reamer clockwise while press-
ing it lightly into valve guide, and return it also ro-
tating clockwise. After reaming, clean the valve
guide to remove chips.
CAUTION:
 Apply engine oil to the reamer when reaming.
 If the inner surface of the valve guide is torn,
the edge of the reamer should be slightly
ground with an oil stone.
 If the inner surface of the valve guide be-
comes lustrous and the reamer does not chips,
use a new reamer or remedy the reamer.
(A) Valve guide
ME-00290
ST2
ST1
(A)
ME-00291
ST
(A) Valve guide
ST2
ME-00292
ST1
ME-00293(A)L

CO(H4SO)-14
COOLING
Radiator Fan System
B: INSPECTION
DETECTING CONDITION:
 Engine coolant temperature is above 95°C (203°F).
 Vehicle speed is below 19 km/h (12 MPH).
TROUBLE SYMPTOM:
Radiator main fan and sub fan does not rotate under the above conditions.
Step Check Yes No
1 CHECK OPERATION OF RADIATOR FAN.
1) Connect the test mode connector.
2) Turn the ignition switch to ON.
3) Using Subaru Select Monitor, check the
compulsory operation of radiator fan relay.
N
OTE:
 With Subaru Select Monitor
When checking the compulsory operation of
radiator fan, the radiator main and sub fan
repeat the rotation in order of following: low
speed rotation → high speed rotation → off.
 Subaru Select Monitor
Refer to Compulsory Valve Operation Check
Mode for detail procedures. EN(H4SO)-45, Compulsory Valve Operation
Check Mode.>Do the radiator main and sub
fan rotate at low speed?Go to step 2.Go to step 3.
2 CHECK OPERATION OF RADIATOR FAN.
1) Connect the test mode connector.
2) Turn the ignition switch to ON.
3) Using Subaru Select Monitor, check the
compulsory operation of radiator fan relay.
N
OTE:
 With Subaru Select Monitor
When checking the compulsory operation of
radiator fan, the radiator main and sub fan
repeat the rotation in order of following: low
speed rotation → high speed rotation → off.
 Subaru Select Monitor
Refer to Compulsory Valve Operation Check
Mode for detail procedures. EN(H4SO)-45, Compulsory Valve Operation
Check Mode.>Do the radiator main and sub
fan rotate at high speed?Radiator main fan
system is okay.Go to step 32.
3 CHECK POWER SUPPLY TO MAIN FAN RE-
LAY.
1) Turn the ignition switch to OFF.
2) Remove the fan relay 1 from A/C relay
holder.
3) Measure the voltage between main fan
relay terminal and chassis ground.
Connector & terminal
(F27) No. 31 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 4.Go to step 5.
4 CHECK POWER SUPPLY TO MAIN FAN RE-
LAY.
1) Turn the ignition switch to ON.
2) Measure the voltage between main fan
relay terminal and chassis ground.
Connector & terminal
(F27) No. 34 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 8.Go to step 7.
5 CHECK FUSE.
1) Remove the fuse from A/C relay holder.
2) Check the condition of fuse.Is the fuse blown out? Replace the fuse. Go to step 6.

CO(H4SO)-25
COOLING
Water Pump
9) Install the automatic belt tension adjuster (A)
which has tension rod held by pin. ME(H4DOTC)-60, AUTOMATIC BELT TENSION
ADJUSTER ASSEMBLY AND BELT IDLER, IN-
STALLATION, Timing Belt Assembly.>
Tightening torque:
39 N
⋅m (4.0 kgf-m, 28.9 ft-lb)
10) Install the timing belt. 61, TIMING BELT, INSTALLATION, Timing Belt
Assembly.>
11) Install the V-belts. INSTALLATION, V-belt.>
12) Install the radiator. STALLATION, Radiator.>
C: INSPECTION
1) Check the water pump bearing for smooth rota-
tion.
2) Check the water pump pulley for abnormalities.
3) Using a dial gauge, measure the impeller runout
in thrust direction while rotating the pulley.
“Thrust” runout limit:
0.5 mm (0.020 in)
4) Check the clearance between impeller and
pump case.
Clearance between impeller and pump case:
Standard
0.5 — 0.7 mm (0.020 — 0.028 in)
Limit
1.0 mm (0.039 in)
5) After water pump installation, check the pulley
shaft for engine coolant leaks. If leaks are noted,
replace the water pump assembly.
CO-00023
(A)
(B)
(C)
CO-00028
CO-00029

CO(H4SO)-31
COOLING
Radiator
4) Attach the power steering hose to radiator.
5) Connect the radiator inlet hose.
6) Install the reservoir tank.
Tightening torque:
4.9 N
⋅m (0.50 kgf-m, 3.6 ft-lb)
7) Connect the overflow hose.
8) Lift-up the vehicle.
9) Connect the ATF cooler hoses. (AT model)10) Connect the radiator outlet hose.
11) Connect the connectors to radiator main fan
motor (A) and sub fan motor (B).
12) Install the under cover.
13) Lower the vehicle.
14) Connect the battery ground cable to battery.
15) Fill engine coolant. FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
16) Check the ATF level. SPECTION, Automatic Transmission Fluid.>
CO-00037
CO-00035
CO-00015
CO-00034
CO-00076
CO-00013
(A)(B)
FU-00009

CO(H4SO)-33
COOLING
Radiator
12) Connect the oil cooler hose. (MT model with oil
cooler)
13) Connect the radiator outlet hose.
14) Connect the connectors to radiator main fan
motor (A) and sub fan motor (B).
15) Install the under cover.
16) Lower the vehicle.
17) Connect the battery ground cable to battery.
18) Fill engine coolant. FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>19) Check the ATF level. SPECTION, Automatic Transmission Fluid.>
C: INSPECTION
1) Remove the radiator cap, top off radiator, and
then attach the tester (A) to radiator in place of cap.
 NON-TURBO MODEL
 TURBO MODEL
2) Apply a pressure of 157 kPa (1.6 kg/cm
2, 23 psi)
to the radiator to check if:
(1) Engine coolant leaks at/around radiator.
(2) Engine coolant leaks at/around hoses or
connections.
CAUTION:
 Inspection must be carried out at the side of
coolant filler tank, not at the side of radiator.
 Engine should be off.
 Wipe engine coolant from check points in ad-
vance.
 Be careful to prevent engine coolant from
spurting out when removing the tester.
 Be careful also not to deform the filler neck of
radiator when installing or removing tester.
CO-00034
CO-00030
CO-00013
(A)(B)
FU-00009
CO-00042
(A)
CO-00043
(A)

LU(H4SO)-9
LUBRICATION
Oil Pressure System
B: INSPECTION
Step Check Yes No
1 CHECK COMBINATION METER.
1) Turn the ignition switch to ON. (engine
OFF)
2) Check other warning lights.Does the warning lights illumi-
nate?Go to step 2.Repair or replace
the combination
meter. 4, INSPECTION,
Combination
Meter System.>
2 CHECK HARNESS CONNECTOR BETWEEN
COMBINATION METER AND OIL PRES-
SURE SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from oil pressure
switch.
3) Turn the ignition switch to ON.
4) Measure the voltage of harness between
the combination meter connector and chassis
ground.
Connector & terminal
(E11) No. 1 (+) — Chassis ground (
−):Is the voltage more than 10 V? Replace the oil
pressure switch.Go to step 3.
3 CHECK COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Remove the combination meter.
3) Measure the resistance of combination
meter.
Te r m i n a l
No. B9 — No. A3:Is the resistance less than 10
Ω?Replace the har-
ness connector
between combina-
tion meter and oil
pressure switch.Repair or replace
the combination
meter and the oil
pressure switch
warning light bulb.

LU(H4SO)-10
LUBRICATION
Engine Oil
3. Engine Oil
A: INSPECTION
1) Park the vehicle on a level surface.
2) Remove the oil level gauge and wipe it clean.
3) Reinsert the level gauge all the way. Be sure that
the level gauge is correctly inserted and in the
proper orientation.
4) Remove it again and note the reading. If the en-
gine oil level is below the “L” line, add oil to bring
the level up to “F” line.
5) After turning off the engine, wait a few minutes
for the oil to drain back into the oil pan before
checking the level.
6) Just after driving or while the engine is warm, en-
gine oil level may show in the range between the
“F” line and notch mark. This is caused by thermal
expansion of the engine oil.
NOTE:
To prevent overfilling the engine oil, do not add oil
above the “F” line when the engine is cold.
B: REPLACEMENT
1) Open the engine oil filler cap for quick draining of
the engine oil.
2) Remove six clips.
3) Turn the service hole cover counterclockwise.
4) Drain the engine oil by loosening the engine oil
drain plug.
5) Replace the drain plug gasket.
(A) Oil level gauge
(B) Engine oil filler cap
(C) Upper level
(D) Lower level
(E) Approx. 1.02 (1.1 US qt, 0.9 Imp qt)
LU-00138
(A)(B)
(C)
(D) (E)
(A) Drain plug
(B) Oil filter
LU-00103
LU-00104
LU-00089
(B)
(A)