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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Engine Mechanical - 3.0L) >> On-Vehicle Service >> Rocker Arm Piston Operation Check

Rocker Arm Piston Operation Check

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove all of the ignition coils.
  2. Remove the rocker cover.
    Fig 1: Identifying Ignition Coils
    G09663642Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  3. Remove the oil feeder control valve.
  4. Remove the oil pipe.
  5. Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with the "T" mark on the lower cover of timing belt.
    Fig 2: Identifying Oil Feeder Control Valve And Oil Pipe
    G09663643Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. The rocker arm piston operation check can be performed on rocker arms indicated by white arrow mark when the No. 1 cylinder piston is at the top dead center on the compression stroke, and on rocker arms indicated by black arrow mark when the No. 4 cylinder piston is at the top dead center on the compression stroke.
    Fig 3: Locating Piston Cylinder Position
    G09663644Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    NOTE: If the rocker arm of No. 6 cylinder at the intake side is moved up and down and the rocker arm is moved, No. 1 cylinder is at top dead center on compression stroke. If the rocker arm of No. 6 cylinder at the intake side is moved up and down and the rocker arm is not moved, No. 4 cylinder is at top dead center on compression stroke.
    Fig 4: Locating Cylinder Piston Position
    G09663645Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  7. While putting your hands over the oil passage hole located at the back of the oil feeder control valve installation hole in order to prevent air leakage, use an air blow gun to blow compressed air to the oil pipe installation hole at the right bank side. At that time, check that the rocker arm piston at the right bank side is operated.
    NOTE: To surely perform the check, wrap the top of the air blow gun with a vinyl tape. Prevent compressed air leakage as much as possible. The pressure of 620 kPa (90 psi) or more is necessary for the compressed air.
  8. Use the air blow gun to blow the compressed air to the oil pipe installation hole at the left bank side. At that time, check that the rocker arm piston at the left bank side is operated.
    NOTE: To surely perform the check, wrap the top of the air blow gun with a vinyl tape. Prevent compressed air leakage as much as possible. The pressure of 620 kPa (90 psi) or more is necessary for the compressed air.
  9. Turn the crankshaft clockwise until the notch on the crankshaft pulley is lined up with "T" mark on the lower cover of timing belt.
  10. Confirm the rest of the rocker arm pistons under the procedure 7 - 8.
  11. When the rocker arm piston does not operate, replace the rocker arm assembly.
  12. Install the oil pipe and the oil feeder control valve. (Refer to REMOVAL AND INSTALLATION  ).
  13. Install the rocker cover.
  14. Install all of the ignition coils.
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