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Valve Clearance Inspection: 3.0L

  1. Set the vehicle on the lift.
  2. Disconnect battery ground cable. See Figure .
  3. Lift up the vehicle.
  4. Remove under cover. See Figure .
  5. Lower the vehicle.
  6. Place suitable container under the vehicle.
  7. When inspecting right cylinder; remove air intake duct and air cleaner case. Remove V-belt. Remove power steering hose from bracket. See Fig 1 . Remove bolts which install power steering pump bracket. See Fig 2 . Remove power steering tank from the bracket by pulling it upward. See Fig 3 . Place power steering pump on right side wheel apron. See Fig 4 . Remove right fuel pipe protector. See Fig 5 . Disconnect fuel injector connectors. See Fig 6 . Disconnect front oxygen (A/F) sensor connector. See Fig 7 . Disconnect oil pressure switch connector (A), (B) is oil filter. See Fig 8 . Remove ignition coils. Remove right rocker cover.
  8. When inspecting left side cylinder; set the vehicle on the lift. Remove battery. Remove washer tank mounting bolts. See Figure . Disconnect washer motor connectors. See Fig 9 . Move washer tank upward and secure out of the way. See Figure . Disconnect PCV and blow-by hoses from left rocker cover. See Fig 10 . Remove left fuel pipe protector. See Fig 11 . Disconnect fuel injector connectors (A). See Fig 12 . Disconnect front oxygen (A/F) sensor connector (B). Remove ignition coils. Remove left rocker cover.
  9. Using Crankshaft Socket (18252AA000), turn the crankshaft clockwise. Adjust the camshaft position so that the cam lobe is perpendicular to the shim as shown. See Fig 13 .
    10. CAUTION: Insert the thickness gauge in as horizontal a direction as possible with respect to the shim.
    NOTE: If the measured value is not within specification, take notes of the value in order to adjust the valve clearance later on. See VALVE CLEARANCE SPECIFICATION (3.0L)  table.
  10. Measure intake valve and exhaust valve clearances by using thickness gauge (A). See Fig 14 .
  11. Further turn crankshaft pulley clockwise. Using the same procedure described previously, then measure valve clearances again.
  12. If necessary, adjust the valve clearance. See 3.0L  under VALVE ADJUSTMENT. After inspection, install the related parts in the reverse order of removal.
VALVE CLEARANCE SPECIFICATION (3.0L)

Application Clearance - In. (mm)
3.0L
Intake 0.006-0.010 (0.14-0.23)
Exhaust 0.008-0.012 (0.20-0.30)
Fig 1: Removing P/S Hose From Bracket
G00157465Courtesy of SUBARU OF AMERICA, INC.
Fig 2: Removing P/S Pump Bracket Bolts
G00157466Courtesy of SUBARU OF AMERICA, INC.
Fig 3: Removing P/S Pump Tank
G00157467Courtesy of SUBARU OF AMERICA, INC.
Fig 4: Placing P/S Pump On Right Side Wheel Apron
G00157468Courtesy of SUBARU OF AMERICA, INC.
Fig 5: Removing Right Fuel Pipe Protector
G00157469Courtesy of SUBARU OF AMERICA, INC.
Fig 6: Disconnecting Fuel Injector Connectors
G00157470Courtesy of SUBARU OF AMERICA, INC.
Fig 7: Disconnecting Front O2 (A/F) Sensor Connector
G00157471Courtesy of SUBARU OF AMERICA, INC.
Fig 8: Disconnecting Oil Pressure Switch Connector
G00157472Courtesy of SUBARU OF AMERICA, INC.
Fig 9: Disconnecting Washer Motor Connectors
G00157474Courtesy of SUBARU OF AMERICA, INC.
Fig 10: Identifying PCV & Blow-By Hoses
G00157476Courtesy of SUBARU OF AMERICA, INC.
Fig 11: Removing Left Fuel Pipe Protector
G00157477Courtesy of SUBARU OF AMERICA, INC.
Fig 12: Identifying Fuel Injector Connectors
G00157478Courtesy of SUBARU OF AMERICA, INC.
Fig 13: Setting Up 3.0L For Valve Clearance Inspection
G00015149Courtesy of SUBARU OF AMERICA, INC.
Fig 14: Measuring Valve Clearance (3.0L)
G00157479Courtesy of SUBARU OF AMERICA, INC.
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