Engine Cooling System (H4SO): Adjustments Subaru Outback BP

PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT

To adjust the concentration of the 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 coolant that should be replaced can be determined using the diagram.

Example

Assume that the coolant concentration must be increased from 25% to 40%. Find point A, where the 25% line of coolant concentration intersects with the 40% curve of the necessary coolant concentration, and read the scale on the vertical axis of the graph at height A. The quantity of coolant to be drained is 2.1 liters (2.2 US qt, 1.8 Imp qt). Drain 2.1 liters (2.2 US qt, 1.8 Imp qt) of coolant from the cooling system and add 2.1 liters (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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1. Disconnect ground cable from battery.
2. Lift-up the vehicle.
3. Remove under cover.
4. Drain engine coolant completely. Refer to «ENGINE COOLANT»(ref-208362-S36705941042005120700000) .
5. Disconnect connectors from radiator main fan (A) and sub fan (B) motors.
6. Disconnect radiator outlet hose and heater bypass hose from water pump.
7. Lower the vehicle.
8. Remove air intake duct.
9. Disconnect overflow hose.
10. Remove reservoir tank.
11. Remove radiator main fan and sub fan assemblies. Refer to «RADIATOR MAIN FAN AND FAN MOTOR»(ref-208362-S06340741692005120700000) and «RADIATOR SUB FAN AND FAN MOTOR»(ref-208362-S17461280022005120700000) .
12. Remove V-belts. Refer to «REMOVAL»(ref-208360-S13242530772005120700000) .
13. Remove timing belt. Refer to «TIMING BELT»(ref-208360-S03415812192005120700000) .
14. Remove automatic belt tension adjuster.
15. Remove belt idler No. 2.
16. Remove left-hand camshaft sprocket by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH NOTE: Camshaft sprocket wrench (499207100) is also available.
17. Remove left-hand belt cover No. 2.
18. Remove tensioner bracket.
19. Remove water pump.

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1. Install water pump onto left-hand cylinder block. NOTE: Replace gasket with a new one. When installing water pump, tighten bolts in two stages in alphabetical sequence as shown in figure. Tightening torque: First: 12 N.m (1.2 kgf-m, 8.7 ft-lb) Second: 12 N.m (1.2 kgf-m, 8.7 ft-lb)
2. Install tensioner bracket. Tightening torque: 25 N.m (2.5 kgf-m, 18.1 ft-lb)
3. Install left-hand belt cover No. 2. Tightening torque: 5 N.m (0.5 kgf-m, 3.6 ft-lb)
4. Install left-hand camshaft sprockets by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH NOTE: Camshaft sprocket wrench (499207100) is also available. Tightening torque: 78 N.m (8.0 kgf-m, 57.9 ft-lb)
5. Install belt idler No. 2. Tightening torque: 39 N.m (4.0 kgf-m, 28.9 ft-lb)
6. Install automatic belt tension adjuster which tension rod is held with pin. Refer to «AUTOMATIC BELT TENSION ADJUSTER ASSEMBLY AND BELT IDLER»(ref-208360-S36923269872005120700000) .
7. Install timing belt. Refer to «TIMING BELT»(ref-208360-S03415812192005120700000) .
8. Install V-belts. Refer to «INSTALLATION»(ref-208360-S17941312302005120700000) .
9. Install radiator main fan and sub fan motor assemblies. Refer to «INSTALLATION»(ref-208362-S27104975532005120700000) , Radiator Main Fan and Fan Motor and «INSTALLATION»(ref-208362-S06025832252005120700000) , Radiator Sub Fan and Fan Motor.
10. Install reservoir tank.
11. Connect overflow hose.
12. Install air intake duct.
13. Lift-up the vehicle.
14. Connect radiator outlet hose and heater bypass hose to water pump.
15. Connect connectors to radiator main fan (A) and sub fan (B) motors.
16. Install under cover.
17. Lower the vehicle.
18. Connect battery ground cable.
19. Fill coolant. Refer to «FILLING OF ENGINE COOLANT»(ref-208362-S19587309232005120700000) .

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1. Check water pump bearing for smooth rotation.
2. Check water pump pulley for abnormalities.
3. Using a dial gauge, measure impeller runout in thrust direction while rotating the pulley. "Thrust" runout limit: 0.5 mm (0.020 in)
4. Check 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 pulley shaft for engine coolant leaks. If leaks are noted, replace water pump assembly.

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1. Lift-up the vehicle.
2. Remove under cover.
3. Drain engine coolant completely. Refer to «DRAINING OF ENGINE COOLANT»(ref-208362-S03752448702005120700000) .
4. Disconnect radiator outlet hose from thermostat cover.
5. Remove thermostat cover and gasket, and pull out the thermostat.

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1. Install the thermostat in the water pump, and install the thermostat cover together with a gasket. NOTE: Replace gasket with a new one. Thermostat must be installed with jiggle pin (A) facing the front side. Tightening torque: 6.5 N.m (0.66 kgf-m, 4.8 ft-lb)
2. Fill coolant. Refer to «FILLING OF ENGINE COOLANT»(ref-208362-S19587309232005120700000) .