Engine Cooling System - Cooling (H4DOTC): Adjustments Subaru Outback BP рестайлинг

PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT

To adjust the concentration of coolant according to temperature, find the proper engine coolant concentration in the diagram 1 and replace the necessary amount of coolant with an undiluted solution of engine coolant (concentration 50%).

The amount of engine coolant that should be replaced can be determined using the diagram 2.

[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 intersects 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 2.1 l (2.2 US qt, 1.8 lmp qt). Drain 2.1 l (2.2 US qt, 1.8 lmp qt) of coolant from the cooling system and add 2.1 l (2.2 US qt, 1.8 lmp qt) undiluted engine coolant solution.

If a coolant concentration of 50% is needed, drain all the coolant and refill with the undiluted solution only.

Scheme 63

1. Diagram 2

Scheme 64

Scheme 65

Scheme 66

Scheme 67

1. Remove the collector cover.
2. Remove the radiator. REMOVAL, Radiator .>
3. Remove the V-belts. REMOVAL , V-belt .>
4. Remove the crank pulley. REMOVAL , Crank Pulley .>
5. Remove the timing belt. REMOVAL , Timing Belt .>
6. Remove the automatic belt tension adjuster (A).
7. Remove the belt idler (B).
8. Remove the belt idler No. 2 (C).
9. Remove the cam sprocket (LH) using ST. REMOVAL , Cam Sprockets .>
10. Remove the belt cover (LH) No. 2.
11. Remove the tensioner bracket.
12. Disconnect the hose from water pump.
13. Remove the water pump.

Scheme 68

1. Install the water pump onto cylinder block (LH). NOTE: Use a new gasket. When installing the water pump, tighten the bolts in two stages in alphabetical sequence as shown in figure. Tightening torque: First: 12 N.m (1.2 kgf-m, 8.9 ft-lb) Second: 12 N.m (1.2 kgf-m, 8.9 ft-lb)
2. Install the hose to water pump.
3. Install the tensioner bracket. Tightening torque: 24.5 N.m (2.5 kgf-m, 18.1 ft-lb)
4. Install the belt cover No. 2 (LH). Tightening torque: 5 N.m (0.5 kgf-m, 3.6 ft-lb)
5. Install the cam sprocket (LH) using ST. INSTALLATION , Cam Sprockets .>
6. Install the belt idler No. 2 (C).
7. Install the belt idler (B).
8. Install the automatic belt tension adjuster (A) which has a tension rod held by a pin. AUTOMATIC BELT TENSION ADJUSTER ASSEMBLY AND BELT IDLER , INSTALLATION, Timing Belt .> Tightening torque: 39 N.m (4.0 kgf-m, 28.9 ft-lb)
9. Install the timing belt. TIMING BELT , INSTALLATION, Timing Belt .>
10. Install the crank pulley. INSTALLATION , Crank Pulley .>
11. Install the V-belts. INSTALLATION , V-belt .>
12. Install the radiator. INSTALLATION, Radiators .>
13. Install the collector cover.

Scheme 69

1. Check the water pump bearing for smooth rotation.
2. Check the water pump pulley for abnormalities.
3. Make sure the impeller is not deformed or damaged.
4. Inspect the clearance between impeller and pump case. Clearance between impeller and pump case: Standard 0.5 - 1.5 mm (0.020 - 0.059 in)
5. After water pump installation, check pulley shaft for engine coolant leaks or noise. If leaks or noise are noted, replace the water pump assembly.

Scheme 70

Scheme 71

1. Set the vehicle on a lift.
2. Lift up the vehicle.
3. Remove the under cover.
4. Drain engine coolant completely. DRAINING OF ENGINE COOLANT, REPLACEMENT, Engine Coolants .>
5. Disconnect the radiator outlet hose from thermostat cover.
6. Remove the thermostat cover, and then remove the gasket and thermostat.

Scheme 72

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 upward. Tightening torque: 12 N.m (1.2 kgf-m, 8.9 ft-lb)
3. Connect the radiator outlet hose to thermostat cover.
4. Install the under cover.
5. Lower the vehicle.
6. Fill engine coolant. FILLING OF ENGINE COOLANT, REPLACEMENT, Engine Coolant .>