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Engine Cooling System: Adjustments Subaru Impreza GD/GC/GG рестайлинг

Cooling Fan 29 illustrations ~991 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 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.

Scheme 35

Scheme 35: PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT
Scheme 35: PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT

Scheme 36

Scheme 36: NON-TURBO MODEL
Scheme 36: NON-TURBO MODEL

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38

Scheme 39

Scheme 39
Scheme 39

Scheme 40

Scheme 40
Scheme 40

Scheme 41

Scheme 41
Scheme 41
  1. Remove the radiator, see «REMOVAL»(ref-180110-S09738665852005072100000) , Radiator.
  2. Remove V-belts, see «REMOVAL»(ref-179853-S36638069112005071500000) , V-belt.
  3. Remove the timing belt, see «TIMING BELT»(ref-179853-S39957503062005071500000) , REMOVAL, Timing Belt.
  4. Remove the automatic belt tension adjuster.
  5. Remove the belt idler No. 2.
  6. Remove the left-hand camshaft sprocket by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH NOTE: Also the CAMSHAFT SPROCKET WRENCH (499207100) can be used.
  7. Remove the left-hand belt cover No. 2.
  8. Remove the tensioner bracket.
  9. Disconnect the heater hose from the water pump.
  10. Remove the water pump.

Scheme 42

Scheme 42: TURBO MODEL
Scheme 42: TURBO MODEL

Scheme 43

Scheme 43
Scheme 43

Scheme 44

Scheme 44
Scheme 44

Scheme 45

Scheme 45
Scheme 45

Scheme 46

Scheme 46
Scheme 46
  1. Remove the radiator, see «REMOVAL»(ref-180110-S09738665852005072100000) , Radiator.
  2. Remove the V-belts, see «REMOVAL»(ref-179854-S23601933212005071500000) , V-belt.
  3. Remove the timing belt, see «REMOVAL»(ref-179854-S33820595882005071500000) , Timing Belt Assembly.
  4. Remove the automatic belt tension adjuster (A).
  5. Remove the belt idler (B).
  6. Remove the belt idler No. 2 (C).
  7. Remove the camshaft position sensor, see «REMOVAL & INSTALLATION»(ref-161281-S15053469242004033100000) , Camshaft Position Sensor.
  8. Remove the left-hand camshaft sprockets by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH (Intake) ST 499207400 CAMSHAFT SPROCKET WRENCH (Exhaust)
  9. Remove the left-hand belt cover No. 2.
  10. Remove the tensioner bracket.
  11. Disconnect the heater hose from the water pump.
  12. Remove the water pump.

Scheme 47

Scheme 47: NON-TURBO MODEL
Scheme 47: NON-TURBO MODEL

Scheme 48

Scheme 48
Scheme 48

Scheme 49

Scheme 49
Scheme 49

Scheme 50

Scheme 50
Scheme 50

Scheme 51

Scheme 51
Scheme 51
  1. Install the water pump onto the 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 the hose to the water pump.
  3. Install the tensioner bracket. Tightening torque: 25 N.m (2.5 kgf.m, 18.1 ft.lb)
  4. Install the left-hand belt cover No. 2. Tightening torque: 5 N.m (0.5 kgf.m, 3.6 ft.lb)
  5. Install the left-hand camshaft sprockets 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 held with pin. See «AUTOMATIC BELT TENSION ADJUSTER ASSEMBLY AND BELT IDLER»(ref-179853-S22294934372005071500000) , Installation, Timing Belt.
  8. Install the timing belt, see «INSTALLATION»(ref-179853-S28094500202005071500000) , Timing Belt.
  9. Install V-belts, see «INSTALLATION»(ref-179853-S30538516692005071500000) , V-belt.
  10. Install the radiator, see «INSTALLATION»(ref-180110-S15042483712005072100000) , Radiator.

Scheme 52

Scheme 52: TURBO MODEL
Scheme 52: TURBO MODEL

Scheme 53

Scheme 53
Scheme 53

Scheme 54

Scheme 54
Scheme 54

Scheme 55

Scheme 55
Scheme 55

Scheme 56

Scheme 56
Scheme 56
  1. Install the water pump onto the 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 the hose to the water pump.
  3. Install the tensioner bracket. Tightening torque: 25 N.m (2.5 kgf.m, 18.1 ft.lb)
  4. Install the left-hand belt cover No. 2. Tightening torque: 5 N.m (0.5 kgf.m, 3.6 ft.lb)
  5. Install the left-hand camshaft sprockets by using ST. ST 18231AA010 CAMSHAFT SPROCKET WRENCH (Intake) ST 499207400 CAMSHAFT SPROCKET WRENCH (Exhaust) Tightening torque: 98 N.m (10.0 kgf.m, 72.4 ft.lb)
  6. Install the camshaft position sensor, see «REMOVAL & INSTALLATION»(ref-161281-S15053469242004033100000) , Camshaft Position Sensor.
  7. Install the belt idler No. 2 (C).
  8. Install the belt idler (B).
  9. Install the automatic belt tension adjuster (A) which has a tension rod held by a pin. See «AUTOMATIC BELT TENSION ADJUSTER ASSEMBLY AND BELT IDLER»(ref-179854-S25762630562005071500000) , Installation, Timing Belt Assembly Tightening torque: 39 N.m (4.0 kgf.m, 28.9 ft.lb)
  10. Install the timing belt, see «INSTALLATION»(ref-179854-S39203199362005071500000) , Timing Belt Assembly.
  11. Install the V-belts, see «INSTALLATION»(ref-179854-S40545159892005071500000) , V-belt.
  12. Install the radiator, see «TURBO MODEL»(ref-180110-S30484485542005072100000) , Installation, Radiator.

Scheme 57

Scheme 57: INSPECTION
Scheme 57: INSPECTION

Scheme 58

Scheme 58
Scheme 58
  1. Check the water pump bearing for smooth rotation.
  2. Check the 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 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 pulley shaft for engine coolant leaks. If leaks are noted, replace the water pump assembly.

Scheme 59

Scheme 59: REMOVAL
Scheme 59: REMOVAL

Scheme 60

Scheme 60
Scheme 60

Scheme 61

Scheme 61
Scheme 61

Scheme 62

Scheme 62
Scheme 62
  1. Lift-up the vehicle.
  2. Remove the under cover.
  3. Drain engine coolant completely. See «DRAINING OF ENGINE COOLANT»(ref-180110-S14725639022005072100000) , Replacement, Engine Coolant.
  4. Disconnect the radiator outlet hose from the thermostat cover. NON-TURBO MODEL
  5. Disconnect the radiator outlet hose. TURBO MODEL
  6. Remove the thermostat cover and gasket, and pull out the thermostat.

Scheme 63

Scheme 63: INSTALLATION
Scheme 63: INSTALLATION
  1. Install the thermostat in the water pump, and 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. At this time, set the jiggle pin of thermostat for front side. Tightening torque: 6.5 N.m (0.66 kgf.m, 4.8 ft.lb)
  2. Fill engine coolant, see «FILLING OF ENGINE COOLANT»(ref-180110-S07004686282005072100000) , REPLACEMENT, Engine Coolant.

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