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Home › Subaru › 2013 › Outback Base, Standard Trans › Repair and Diagnosis › Engine Mechanical › Mechanical › Engine Mechanical (H4DO) › Timing Chain Assembly › Removal › Timing Chain LH

Timing Chain LH

  1. Remove the timing chain RH. Refer to TIMING CHAIN RH .
  2. Using ST and by turning the crankshaft, align the alignment marks of crankshaft key, intake cam sprocket LH and exhaust cam sprocket LH to the positions as shown in the figure.

    ST 18252AA000 CRANKSHAFT SOCKET

    Fig 1: Aligning Alignment Marks Of Crankshaft Key, Intake And Exhaust Cam Sprocket LH Using Tool
    G08562970Courtesy of SUBARU OF AMERICA, INC.
  3. Push down the chain lever tensioner LH, and with a 2.5 mm (0.98 in) dia. stopper pin or a 2.5 mm (0.98 in) dia. hex wrench inserted into the stopper pin hole in the chain tensioner LH, secure the plunger (A).
    Fig 2: Inserting Hex Wrench Into Chain Tensioner LH Stopper Pin Hole
    G08316945Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the chain tensioner LH, and remove the chain tensioner lever LH (A).
    Fig 3: Locating Chain Tensioner Lever LH Mounting Bolts
    G08562972Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the O-ring from the cylinder block LH.
    Fig 4: Locating Cylinder Block LH O-Ring
    G08580109Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the chain guide LH, and remove the timing chain LH (A).
    CAUTION:
    • If the timing chain LH is not installed, the exhaust camshaft LH is kept at zero-lift position. All cams on the exhaust camshaft LH are not pressing down the roller rocker arm (exhaust valve). (Under this condition, exhaust valves remain unlifted.)
    • Intake camshaft LH is kept at lift position. All cams on the intake camshaft LH are pressing down the roller rocker arm (intake valve). (Under this condition, intake valves remain lifted.)
    • Intake camshaft LH and exhaust camshaft RH can be independently rotated with the timing chain LH removed. When the exhaust camshaft LH is turned, the valve heads contact each other and valve stem may bend as described in above. Do not turn the exhaust camshaft LH to the outside of range of zero-lift (in range where it can be turned lightly by hand).
    • #1 piston and #4 piston are located near TDC. If the intake camshaft LH is turned, the valve and the piston may contact and valve stem may bend. Do not turn the intake camshaft LH at this time.
    NOTE: To avoid mixing with RH side, keep the removed part in order.
    Fig 5: Locating Chain Guide LH Mounting Bolts
    G08580110Courtesy of SUBARU OF AMERICA, INC.
  7. Using ST and by turning the crankshaft approximately 200° clockwise, align the alignment marks of crank sprocket to the positions as shown in the figure.
    CAUTION:
    • This procedure is required to prevent the valve and piston contacting with each other, by moving the all pistons to the middle of the cylinders.
    • Never turn counterclockwise because the valve and piston may contact. Counterclockwise turn is allowed only when adjusting precisely the alignment marks, after turning the crank sprocket alignment mark clockwise near the position as shown in the figure.

    ST 18252AA000 CRANKSHAFT SOCKET

    Fig 6: Turning Crankshaft Using Tool
    G08316949Courtesy of SUBARU OF AMERICA, INC.
  8. Using ST and by turning the intake cam sprocket LH approximately 180°, align the alignment marks of intake cam sprocket LH to the positions (zero-lift position) as shown in the figure.
    CAUTION: After this work, when the intake valve and exhaust valve lift at the same time, the valve heads contact each other and valve stem may bend. Do not turn the intake camshaft LH and exhaust camshaft LH to the outside of range of zero-lift (in range where it can be turned lightly by hand).

    ST1 18355AA000 PULLEY WRENCH

    ST2 18334AA030 PULLEY WRENCH PIN SET

    Fig 7: Aligning Alignment Marks Of Intake Cam Sprocket LH To Zero-Lift Position Using Tools
    G08562976Courtesy of SUBARU OF AMERICA, INC.
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