2004 SUBARU FORESTER engine coolant

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)

COOLING
CO(H4SO)
Page
1. General Description ....................................................................................2
2. Radiator Fan System ................................................................................13
3. Engine Coolant..........................................................................................19
4. Water Pump ..............................................................................................21
5. Thermostat ................................................................................................26
6. Radiator.....................................................................................................28
7. Radiator Cap .............................................................................................34
8. Radiator Main Fan and Fan Motor ............................................................35
9. Radiator Sub Fan and Fan Motor..............................................................40
10. Reservoir Tank ..........................................................................................41
11. Coolant Filler Tank ....................................................................................42
12. Engine Cooling System Trouble in General ..............................................43

CO(H4SO)-2
COOLING
General Description
1. General Description
A: SPECIFICATION
ModelNon-turbo Turbo
Cooling system Electric fan+Forced engine coolant circulation system
Total engine coolant capacity2(US qt, Imp qt)2.0L with ATF warmer:
Approx. 6.9 (7.29, 6.07)
2.0L AT:
Approx. 6.5 (6.87, 5.72)
2.0L MT:
Approx. 6.6 (6.98, 5.81)
2.5L AT:
Approx. 6.8 (7.19, 5.98)
2.5L MT:
Approx. 6.9 (7.29, 6.07)AT :
Approx. 7.3 (7.71, 6.42)
MT with oil cooler:
Approx. 7.3 (7.71, 6.42)
MT without oil cooler:
Approx. 7.4 (7.82, 6.51)
Water pumpType Centrifugal impeller type
Discharge perfor-
mance IDischarge 202 (5.3 US gal, 4.4 Imp gal)/min.
Pump speed — Discharge
pressure760 rpm — 2.9 kPa (0.3 mAq)
Engine coolant temperature 85°C (185°F)
Discharge perfor-
mance IIDischarge 1002 (26.4 US gal, 22.0 Imp gal)/min.
Pump speed — Discharge
pressure3,000 rpm — 49.0 kPa (5.0 mAq)
Engine coolant temperature 85°C (185°F)
Discharge perfor-
mance IIIDischarge 2002 (52.8 US gal, 44.0 Imp gal)/min.
Pump speed — Discharge
pressure6,000 rpm — 225.4 kPa (23.0 mAq)
Engine coolant temperature 85°C (185°F)
Impeller diameter 76 mm (2.99 in)
Number of impeller vanes 8
Pump pulley diameter 60 mm (2.36 in)
Clearance between
impeller and caseStandard 0.5 — 0.7 mm (0.020 — 0.028 in)
Limit 1.0 mm (0.039 in)
“Thrust” runout of impeller end 0.5 mm (0.020 in)
ThermostatType Wax pellet type
Starts to open 80 — 84°C (176 — 183°F) 76 — 80°C (169 — 176°F)
Fully opened 95°C (203°F) 91°C (196°F)
Valve lift 9.0 mm (0.354 in) or more
Valve bore 35 mm (1.38 in)
Radiator fanMotorMain fan 70 W2.0L AT (K4
★1) : 70 W
2.0L AT (EC, EK★1) :
120 W
2.0 L MT: 70 W
2.5 L: 120 W
Sub fan 70 W2.0L AT (K4
★1) : 70 W
2.0L AT (EC, EK★1) :
120 W
2.0 L MT: 70 W
2.5 L: 120 W
Fan diameter×Blade320 mm (11.81 in)×5 (main fan)
320 mm (11.81 in)×7 (sub fan)

CO(H4SO)-7
COOLING
General Description
2. RADIATOR AND RADIATOR FAN
 NON-TURBO MODEL
(1) Radiator lower cushion (11) Radiator sub fan (21) Radiator outlet hose
(2) Radiator (12) Radiator sub fan motor (22) Radiator drain plug
(3) Radiator upper cushion (13) Radiator main fan (23) Radiator cap
(4) Radiator upper bracket (14) Radiator main fan motor
(5) Clamp (15) ATF hose clamp (AT model)Tightening torque: N
⋅m (kgf-m, ft-lb)
(6) Radiator inlet hose (16) ATF inlet hose A (AT model)T1: 4.4 (0.45, 3.3)
(7) Engine coolant reservoir tank cap (17) ATF outlet hose A (AT model)T2: 7.5 (0.76, 5.5)
(8) Overflow hose (18) ATF pipe (AT model)T3: 18 (1.8, 13.0)
(9) Engine coolant reservoir tank (19) ATF inlet hose B (AT model)T4: 3.4 (0.35, 2.5)
(10) Radiator sub fan shroud (20) ATF outlet hose B (AT model)T5: 4.9 (0.50, 3.6)
CO-00003
(9)
(1)(10)(8)
(2)
T3
T2
T2
T4
T4(14)
(20) (22)(3) (4)
(19)(16)
(18)(7)
(17)
(15) (15)
(15)
(15) (15) (15)(12)
(11)
(13)
T5
T1
T1
(5) (5)
(5)(6)
(21)
A
A
C
T3
B
B
C
(23)

CO(H4SO)-9
COOLING
General Description
(1) Radiator lower cushion (18) ATF pipe (AT model) (31) Oil cooler inlet hose B (MT model
with oil cooler)
(2) Radiator (19) ATF inlet hose B (AT model)
(3) Radiator upper cushion (20) ATF outlet hose B (AT model) (32) Oil cooler outlet hose B (MT
model with oil cooler)
(4) Radiator upper bracket (21) Radiator outlet hose
(5) Clamp (22) Radiator drain plug (33) Spacer (MT model with oil cooler)
(6) Radiator inlet hose (23) Engine coolant filler tank (34) Cushion (MT model with oil
cooler)
(7) Engine coolant reservoir tank cap (24) Engine coolant filler tank cap
(8) Over flow hose (25) Engine overflow hose (35) Setting washer (MT model with oil
cooler)
(9) Engine coolant reservoir tank (26) Radiator under cover (AT model)
(10) Radiator fan shroud (27) Engine air breather hose
(11) Radiator sub fan (28) Oil cooler inlet hose A (MT model
with oil cooler)Tightening torque: N
⋅m (kgf-m, ft-lb)
(12) Radiator sub fan motorT1: 4.4 (0.45, 3.3)
(13) Radiator main fan (29) Oil cooler outlet hose A (MT
model with oil cooler)T2: 7.5 (0.76, 5.5)
(14) Radiator main fan motorT3: 18 (1.8, 13.0)
(15) ATF hose clamp (AT model) (30) Oil cooler pipe (MT model with oil
cooler)T4: 3.4 (0.35, 2.5)
(16) ATF inlet hose A (AT model)T5: 4.9 (0.50, 3.6)
(17) ATF outlet hose A (AT model)

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)-19
COOLING
Engine Coolant
3. Engine Coolant
A: REPLACEMENT
1. DRAINING OF ENGINE COOLANT
1) Lift-up the vehicle.
2) Remove the under cover.
3) Remove the drain cock to drain engine coolant
into container.
NOTE:
Remove the radiator cap so that engine coolant will
drain faster.
4) Install the drain cock.
2. FILLING OF ENGINE COOLANT
1) Fill engine coolant into the radiator up to filler
neck position.
Coolant capacity (fill up to “FULL” level): to CO(H4SO)-2, SPECIFICATION, General De-
scription.>
NOTE:
The SUBARU Genuine Coolant containing anti-
freeze and anti-rust agents is especially made for
SUBARU engine, which has an aluminum crank-
case. Always use SUBARU Genuine Coolant,
since other coolant may cause corrosion.
2) Fill engine coolant into the reservoir tank up to
Full level.
3) Warm-up the engine completely for more than 5
minutes at 2,000 to 3,000 rpm.
4) If the engine coolant level drops in radiator, add
engine coolant to filler neck position.5) If the engine coolant level drops from Full level of
reservoir tank, add engine coolant to Full level.
6) Attach the radiator cap and reservoir tank cap
properly.
CO-00009
CO-00010
FULLFULLLOWLOW

CO(H4SO)-20
COOLING
Engine Coolant
B: INSPECTION
1. RELATIONSHIP OF SUBARU COOLANT
CONCENTRATION AND FREEZING TEM-
PERATURE
The concentration and safe operating temperature
of the SUBARU coolant is shown in the diagram.
Measuring the temperature and specific gravity of
the engine coolant will provide this information.
[Example]
If the engine coolant temperature is 25°C (77°F)
and its specific gravity is 1.054, the concentration is
35% (point A), the safe operating temperature is −
14°C (7°F) (point B), and the freezing temperature
is −20°C (−4°F) (point C).
2. PROCEDURE TO ADJUST THE CON-
CENTRATION OF THE ENGINE COOLANT
To adjust the concentration of the engine coolant
according to temperature, find the proper fluid con-
centration in the above diagram and replace the
necessary amount of the engine coolant with an
undiluted solution of SUBARU genuine coolant
(concentration 50%).
The amount of the engine coolant that should be
replaced can be determined using the diagram.
[Example]
Assume that the engine coolant concentration must
be increased from 25% to 40%. Find point A, where
the 25% line of the engine coolant concentration in-
tersects with the 40% curve of the necessary the
engine coolant concentration, and read the scale
on the vertical axis of the graph at height A. The
quantity of coolant to be drained is 2.12 (2.2 US qt,
1.8 Imp qt). Drain 2.12 (2.2 US qt, 1.8 Imp qt) of
the engine coolant from the cooling system and
add 2.12 (2.2 US qt, 1.8 Imp qt) of the undiluted
solution of SUBARU coolant.
If a engine coolant concentration of 50% is needed,
drain all the engine coolant and refill with the undi-
luted solution only.
(1) Safe operating temperature
(2) Concentration of coolant
(3) Freezing temperature
(4) Specific gravity of coolant
(5) Coolant temperature °C (°F)
CO-00283
60%
(1.054)
1.000 1.010 1.020
1.030
1.040
1.050
1.060
1.070 1.080 1.090
1.100(1)
(2)
(3)
(5) (4)B
A C
-40
(-40) (-22)(-4)
(14)(32)(50) (68) (86) (104) (122) -30-20 -1001020304050
(77 F)
50%
40%
30%
20%
25 C10%
(1) Necessary concentration of coolant
(2) Quantity of coolant to be drained 2 (US qt, Imp
qt)
(3) Concentration of coolant in the vehicle cooling
system%
(4) Concentration of coolant in vehicle and quantity
to be drained
CO-00284
10 0 12 3
(1.1,
0.9)(2.1,
1.8) (3.2,
2.6)
10%15%25%
20%30%35%40%45%
A
20 30 40 50
(1) (2)
(3)
(4)