Engine Cooling System (3.0L): Adjustments Subaru Outback BH

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 form 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 lmp 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.

Coolant Concentration Graph. Scheme 89

Scheme 90

1. Remove radiator. See «REMOVAL»(ref-178724-S25268133642005062100000), Radiator.
2. Remove V-belt. See «REMOVAL»(ref-159212-S08539056572005061700000), V-belt.
3. Remove front chain cover. See «REMOVAL»(ref-159212-S35166823892005061700000), Front Chain Cover.
4. Remove timing chain. See «REMOVAL»(ref-159212-S21425971972005061700000), Timing Chain Assembly.
5. Remove water pump. (Scheme 90): Removing Water Pump

Scheme 91

1. Install water pump onto rear chain cover. Tightening torque: 6.4 Nm (0.65 kgf-m, 4.7 ft-lb) CAUTION: Replace O-rings with a new one. (Scheme 91): Installing Water Pump
2. Install timing chain assembly. See «INSTALLATION»(ref-159212-S34575938542005061700000), Timing Chain Assembly.
3. Install front chain cover. See «INSTALLATION»(ref-159212-S30706940152005061700000), Front Chain Cover.
4. Install V-belt. See «INSTALLATION»(ref-159212-S41962678682005061700000), V-belt.
5. Install radiator. See «INSTALLATION»(ref-178724-S26439489082005062100000), Radiator.
6. Fill coolant. See «FILLING OF ENGINE COOLANT»(ref-178724-S12492379372005062100000), REPLACEMENT, Engine Coolant.