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Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical System >> Timing Chain Assembly >> Removal >> Timing Chain RH
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Timing Chain RH

NOTE: When replacing a single part, perform the work with the engine assembly installed to body.
  1. Remove the chain cover. Ref. to MECHANICAL (H4DOTC)>Chain Cover>REMOVAL 
  2. Using the ST and by turning the crankshaft, align the alignment mark of crank sprocket, the alignment mark (protrusion) of the intake cam sprocket RH and the alignment mark (protrusion) of the exhaust cam sprocket RH to the positions as shown in the figure.
    NOTE: If the alignment marks are aligned to the positions as shown in the figure, the crankshaft key is located at six o'clock position.

    Preparation tool: 

    ST: CRANKSHAFT SOCKET (18252AA000)

    G13198760Courtesy of SUBARU OF AMERICA, INC.
  3. When the cam sprocket RH is removed, and the cam carrier RH is disassembled
    NOTE: Follow also steps below when the cam sprocket RH is removed, and the cam carrier RH is disassembled.
    1. Using the ST, loosen the bolts which hold the cam sprocket RH.
      CAUTION: In order to prevent damage on each component, be careful not to loosen the bolts too much.

      Preparation tool: 

      ST: SOCKET (18270KA010)

      G13198761Courtesy of SUBARU OF AMERICA, INC.
  4. Push down the chain tensioner lever RH as shown in the figure, and insert a 2.5 mm (0.0984 in) dia. stopper pin or a 2.5 mm dia. hex wrench into the stopper pin hole in the chain tensioner RH to secure the plunger (A).
    G13198762Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the chain tensioner RH, and remove the chain tensioner lever RH (A).
    G13198763Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the O-ring from the cylinder block RH.
    G13198764Courtesy of SUBARU OF AMERICA, INC.
  7. Remove the chain guide RH, and remove the timing chain RH (A).
    CAUTION:
    • If the timing chain RH is not installed, the intake camshaft RH and exhaust camshaft RH are kept at zero-lift position. All cams on the camshaft are not pressing down the roller rocker arm (intake valve and exhaust valve). (Under this condition, all valves remain unlifted.)
    • Intake camshaft RH and exhaust camshaft RH can be independently rotated with the timing chain RH removed. 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 it to the outside of range of zero-lift (in range where it can be turned lightly by hand).
    NOTE: To avoid mixing with LH side, keep the removed part in order.
    G13198765Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the side chain guide RH from the front camshaft cap RH.
    G13198766Courtesy of SUBARU OF AMERICA, INC.
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