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Cooling: Adjustments Subaru Forester SG

Cooling System (Mechanical) 18 illustrations ~663 words

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 l (2.2 US qt, 1.8 Imp qt). Drain 2.1 l (2.2 US qt, 1.8 Imp qt) of coolant from the cooling system and add 2.1 l (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.

Scheme 13

Scheme 13: PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT
Scheme 13: PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT

Scheme 14

Scheme 14: REMOVAL
Scheme 14: REMOVAL

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Scheme 15
Scheme 15

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Scheme 19
  1. Remove the radiator. Refer to «REMOVAL»(ref-200790-S09062525022005102300000) , Radiator.
  2. Remove the V-belts. Refer to «REMOVAL»(ref-200788-S33926247212005102300000) , V-belt.
  3. Remove the timing belt. Refer to «REMOVAL»(ref-200788-S26728354622005102300000) , Timing Belt Assembly.
  4. Remove the automatic belt tension adjuster.
  5. Remove the belt idler No. 2.
  6. Remove the camshaft sprocket (LH) by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH NOTE: Also the CAMSHAFT SPROCKET WRENCH (499207100) can be used.
  7. Remove the belt cover No. 2 (LH).
  8. Remove the tensioner bracket.
  9. Disconnect the heater by-pass hose from water pump.
  10. Remove the water pump.

Scheme 20

Scheme 20: INSTALLATION
Scheme 20: INSTALLATION

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Scheme 23

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Scheme 24
  1. Install water pump onto cylinder block (LH). NOTE: Replace the gasket with a new one. When installing the water pump, tighten bolts in two stages in alphabetical sequence as shown in the 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. Connect the heater by-pass hose to water pump.
  3. Install the belt cover No. 2 (LH). Tightening torque: 5 N.m (0.5 kgf-m, 3.6 ft-lb)
  4. Install the tensioner bracket. Tightening torque: 25 N.m (2.5 kgf-m, 18.1 ft-lb)
  5. Install the camshaft sprockets (LH) by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH NOTE: Also the CAMSHAFT SPROCKET WRENCH (499207100) can be used. Tightening torque: 78 N.m (8.0 kgf-m, 57.9 ft-lb)
  6. Install the belt idler No. 2. Tightening torque: 39 N.m (4.0 kgf-m, 28.9 ft-lb)
  7. Install the automatic belt tension adjuster which tension rod is holded with pin. Refer to «INSTALLATION»(ref-200788-S22789107912005102300000) , Timing Belt Assembly.
  8. Install the timing belt. Refer to «INSTALLATION»(ref-200788-S26289089142005102300000) , Timing Belt Assembly.
  9. Install the V-belts. Refer to «INSTALLATION»(ref-200788-S14994437452005102300000) , V-belt.
  10. Install the radiator. Refer to «INSTALLATION»(ref-200790-S41643596842005102300000) , Radiator.

Scheme 25

Scheme 25: INSPECTION
Scheme 25: INSPECTION

Scheme 26

Scheme 26
Scheme 26
  1. Check the water pump bearing for smooth rotation.
  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.

Scheme 27

Scheme 27: REMOVAL
Scheme 27: REMOVAL

Scheme 28

Scheme 28
Scheme 28

Scheme 29

Scheme 29
Scheme 29
  1. Set the vehicle on a lift.
  2. Lift-up the vehicle.
  3. Remove the under cover.
  4. Drain the engine coolant completely. Refer to «DRAINING OF ENGINE COOLANT»(ref-200790-S24972536202005102300000) , Engine Coolant.
  5. Disconnect the radiator outlet hose from thermostat cover.
  6. Remove the thermostat cover and gasket, and pull out the thermostat.

Scheme 30

Scheme 30: INSTALLATION
Scheme 30: INSTALLATION
  1. Install the thermostat in the water pump, and then install the thermostat cover together with a gasket. NOTE: When reinstalling the thermostat, use a new gasket. The thermostat must be installed with the jiggle pin (A) facing to front side. Tightening torque: 6.5 N.m (0.65 kgf-m, 4.7 ft-lb)
  2. Fill engine coolant. Refer to «FILLING OF ENGINE COOLANT»(ref-200790-S17400688002005102300000) , Engine Coolant.

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