Exhaust Side

Disconnect the ground cable from battery.
Lift up the vehicle.
Remove the under cover. < Ref. to REMOVAL , Front Under Cover. >
Remove the front exhaust pipe. (right side only.) < Ref. to REMOVAL , Front Exhaust Pipe. >
Remove the engine harness cover. (right side only.)

Fig 1: Removing Engine Harness Cover
Courtesy of SUBARU OF AMERICA, INC.
Remove the clip holding the engine harness. (Left side only)

Fig 2: Locating Engine Harness Clip
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the ground cable (A). (Left side only)
Disconnect the connector (B) from the oil flow control solenoid valve, and remove the oil flow control solenoid valve from the cylinder head.

Fig 3: Locating Oil Control Solenoid Valve Connector And Bolts
Courtesy of SUBARU OF AMERICA, INC.