2009 SUBARU TRIBECA engine

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Engine Coolant
COOLING
11) Wait for one minute after the engine stops,
open the radiator cap. If the engine coolant level
drops, add engine coolant into radiator up to the fill-
er neck position.
12) Perform the procedures 10) and 11) again.
13) Attach the radiator cap and reservoir tank cap
properly.
14) Start the engine and operate the heater at max-
imum hot position and the blower speed setting to
“LO.”
15) Run the engine at 2,000 rpm or less until radia-
tor fan starts and stops.
NOTE:
•Be careful with the engine coolant temperature
gauge to prevent overheating.
•If the radiator hose becomes harden with the
pressure of engine coolant, air bleeding operation
seems to be almost completed.
16) Stop the engine and wait until the engine cool-
ant temperature lowers to 30°C (86°F).
17) Open the radiator cap. If the engine coolant lev-
el drops, add engine coolant into radiator up to the
filler neck position and reservoir tank to the “FULL”
level.
18) Attach the radiator cap and reservoir tank cap
properly.
19) Set the heater setting to maximum hot position
and the blower speed setting to “LO” and start the
engine. Perform racing at less than 3,000 rpm. If
the flowing sound is heard at this time, perform the
procedures from 15) again.
B: INSPECTION
1. RELATIONSHIP OF SUBARU COOLANT
CONCENTRATION AND FREEZING TEM-
PERATURE
The concentration and safe operating temperature
of SUBARU coolant is shown in the diagram. Mea-
suring the temperature and specific gravity of the
coolant will provide this information.
[Example]
If the 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).
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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
Safe operating temperature
Freezingtemperature
Concentrationof coolant
Specific gravityof coolant
Coolant temperature
B
A
C
-40(-40) (-22)(-4)(14)(32)(50) (68) (86)
( F)
(104)-30-20 -10010203040
(77 F)
50%
40%
30%
20%
25 C
10%
C

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Engine Coolant
COOLING
2. PROCEDURE TO ADJUST THE CON-
CENTRATION OF THE COOLANT
To adjust the concentration of coolant according to
temperature, find the proper fluid concentration in
the above diagram and replace the necessary
amount of coolant with an undiluted solution of
SUBARU Genuine Coolant (concentration 50%).
The amount of engine coolant that should be re-
placed 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 engine coolant concentration inter-
sects with the 40% curve of the necessary 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 2.1 2(2.2 US qt, 1.8 Imp qt) of coolant
from the cooling system and add 2.1 2(2.2 US qt,
1.8 Imp qt) of the undiluted solution of SUBARU
coolant.
If a coolant concentration of 50% is needed, drain
all the coolant and refill with the undiluted solution
only.
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100
1
2
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
Concentration of coolant in vehicieand quantity to be drained
Quantity of coolant to bedrained (US qt, Imp qt)
Necessary Concentrationof coolant
Concentration of coolant inthe vehicie cooling system %

CO(H6DO)-13
Water Pump
COOLING
4. Water Pump
A: REMOVAL
1) Remove the radiator. REMOVAL, Radiator.>
2) Remove the V-belts.

3) Remove the front chain cover.
Cover.>
4) Remove the timing chain assembly.
Assembly.>
5) Remove the water pump.
NOTE:
When the water pump cannot be removed easily,
screw-in the bolt (A) to the threaded end to remove
water pump.
B: INSTALLATION
1) Install the water pump to rear chain cover.
NOTE:
Apply engine coolant to O-ring.
Tightening torque
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
NOTE:
•Use new O-rings.
•Apply engine coolant to O-ring to install water
pump easier.
2) Install the timing chain assembly.
Chain Assembly.>
3) Install the front chain cover.
Chain Cover.>
4) Install the V-belts.

5) Install the radiator. STALLATION, Radiator.>
6) Fill engine coolant. FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
C: INSPECTION
1) Check the water pump bearing for smooth rota-
tion.
2) Check the water pump sprocket for abnormali-
ties.
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(A)
(A)
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Thermostat
COOLING
5. Thermostat
A: REMOVAL
1) Set the vehicle on a lift.
2) Lift-up the vehicle.
3) Remove the under cover.
4) Drain engine coolant completely.
COOLANT, REPLACEMENT, Engine Coolant.>
5) Disconnect the radiator hose from thermostat
cover.
6) Remove the thermostat cover, and then remove
the thermostat.
B: INSTALLATION
1) Install a gasket to thermostat.
NOTE:
Use a new gasket.
2) Install the thermostat and thermostat cover.
NOTE:
The thermostat must be installed with the jiggle pin
facing to the up side.
Tightening torque:
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
3) Connect the radiator hose to thermostat cover.
4) Install the under cover.
5) Lower the vehicle.
6) Fill engine coolant. FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
C: INSPECTION
Replace the thermostat if the valve does not close
completely at an ambient temperature or if the fol-
lowing test shows unsatisfactory results.
•Inspection method
Immerse the thermostat and a thermometer in wa-
ter. Raise water temperature gradually, and mea-
sure the temperature and valve lift when the valve
begins to open and when the valve is fully opened.
During the test, agitate the water for even temper-
ature distribution. The measured value should
meet the specification.
Starting temperature to open:
80 — 84°C (176 — 183°F)
Fully opens:
95°C (203°F)
NOTE:
•Leave the thermostat in the boiling water for
more than five minutes before measuring the
valve lift.
•Hold the thermostat with a wire or the like to
avoid contacting with container bottom.
Valve lift:
9.0 mm (0.354 in) or more
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(A) Thermometer
(B) Thermostat
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(A)
(B)

CO(H6DO)-15
Radiator
COOLING
6. Radiator
A: REMOVAL
WARNING:
The radiator is pressurized. Wait until engine
cools down before working on the radiator.
1) Set the vehicle on a lift.
2) Remove the collector cover.
3) Disconnect the ground cable from battery.
4) Lift-up the vehicle.
5) Remove the under cover.
6) Drain engine coolant completely.
COOLANT, REPLACEMENT, Engine Coolant.>
7) Disconnect the radiator hose from radiator.
8) Remove the bolts on the underside of the radia-
tor stay.
9) Lower the vehicle.
10) Remove the air intake duct. 7, REMOVAL, Air Intake Duct.>
11) Remove the front upper cover.
12) Remove the radiator upper brackets.
13) Remove the radiator stay.
(1) Remove the latch.
(2) Remove the radiator hose bracket.
(3) Remove the clip holding the harness.
(4) Remove the bolts on the left side of the radi-
ator stay.
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CO(H6DO)-19
Radiator
COOLING
14) Tighten the bolts on the lower side of the radia-
tor stay.
Tightening torque:
18 N·m (1.8 kgf-m, 13.3 ft-lb)
15) Lower the vehicle.
16) Connect the ground cable to battery.
17) Fill engine coolant.
COOLANT, REPLACEMENT, Engine Coolant.>
18) Check the ATF level and replenish it if neces-
sary.
mission Fluid.>
19) Lift-up the vehicle.
20) Install the under cover.
21) Lower the vehicle.
22) Install the front upper cover.
23) Install the air intake duct. INSTALLATION, Air Intake Duct.>
24) Install the collector cover.
C: INSPECTION
1) Remove the radiator cap, fill the radiator with en-
gine coolant, and then install the tester to the instal-
lation position of cap.
2) Apply a pressure of 157 kPa (1.6 kg/cm2, 23 psi)
to the radiator and check the following points:
•Leakage from the radiator or its vicinity
•Leakage from the hose or its connections
CAUTION:
•Engine should be turned off.
•Wipe engine coolant from check points in ad-
vance.
•Be careful of the spurt of engine coolant
when removing the tester.
•Be careful not to deform the filler neck of ra-
diator when installing and removing the tester.
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CO(H6DO)-28
Reservoir Tank
COOLING
3) Install the radiator upper brackets.
Tightening torque:
12 N·m (1.2 kgf-m, 8.9 ft-lb)
4) Install the front upper cover.
5) Install the air intake duct. INSTALLATION, Air Intake Duct.>
6) Lift-up the vehicle.
7) Tighten the bolts on the lower side of the radiator
stay.
Tightening torque:
18 N·m (1.8 kgf-m, 13.3 ft-lb)
8) Install the under cover.
9) Lower the vehicle.
10) Install the collector cover.
C: INSPECTION
Make sure the engine coolant level is between
“FULL” and “LOW”.
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CO(H6DO)-30
Engine Cooling System Trouble in General
COOLING
12.Engine Cooling System Trouble in General
A: INSPECTION
Tr o u b l e P o s s i b l e c a u s e C o r r e c t i v e a c t i o n
Overheating
a. Insufficient engine coolantReplenish engine coolant, inspect for leakage, and
repair it if necessary.
b. De fe c ti ve t he r mo st a t Rep la c e.
c. Malfunction of water pump Replace.
d. Clogged engine coolant passage Clean.
e. Improper ignition timing
Inspect and repair ignition control system. EN(H6DO)(diag)-2, PROCEDURE, Basic Diagnostic
Procedure.>
f. Clogged or leaking radiator Clean, repair or replace.
g. Improper engine oil in engine coolant Replace engine coolant.
h. Air/fuel mixture ratio too lean
Inspect and repair the fuel injection system. EN(H6DO)(diag)-2, PROCEDURE, Basic Diagnostic
Procedure.>
i. Excessive back pressure in exhaust system Clean or replace.
j. Insufficient clearance between piston and cylinder Adjust or replace.
k. Slipping clutch Correct or replace.
l. Dragging brake Adjust.
m. Faulty transmission gear oil Replace.
n. Malfunction of radiator fanInspect the radiator fan relay, engine coolant tempera-
ture sensor or fan motor and replace them.
Over-coolinga. Ambient temperature extremely low Partly cover radiator front area.
b. De fe c ti ve t he r mo st a t Rep la c e.
Engine coolant
leaks
a. Loosened or damaged connecting units on hoses Correct or replace.
b. L ea k ag e f r o m wat e r pu mp Rep la c e.
c. Leakage from water pipe Correct or replace.
d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crankcase Correct or replace.
f. Damaged or cracked ther mostat case Correct or replace.
g. Leakage from radiator Correct or replace.
Strange noise
a. Defective drive belt Replace.
b. De fe c ti ve ra di a t or fan Rep la c e.
c. Defective water pump bearing Replace water pump.
d. Defective water pump mechanical seal Replace water pump.