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Timing Chain (FA20): Removal

  1. Chain cover removal (Refer to DISASSEMBLY )
  2. Timing chain removal (bank 1 side)
    1. Attach the SST to the crankshaft.

      SST 18252AA000

    2. Turn the crankshaft using the SST to align the alignment marks of crankshaft sprocket, intake cam sprocket RH and exhaust cam sprocket RH.
      G12586500Courtesy of SUBARU OF AMERICA, INC.
      NOTE: At this time, the crankshaft sprocket key faces downward.
    3. Push down the chain tension lever as shown in the figure and secure the plunger by inserting a 2. 5 mm dia. hex wrench into the holes of chain tensioner No. 1 and stopper plate.
      G12586501Courtesy of SUBARU OF AMERICA, INC.
      G11258460Courtesy of SUBARU OF AMERICA, INC.
    4. Remove the two bolts and chain tensioner No. 1.
    5. Remove the chain tension lever.
      G11258461Courtesy of SUBARU OF AMERICA, INC.
    6. Remove the bolt, and remove the chain guide.
    7. Remove the timing chain.
      CAUTION: When the timing chain is removed, the valve heads contact each other and the valve stems may bend. Do not turn the intake camshaft RH and exhaust camshaft RH to the outside of the range of zero-lift (in range where they can be turned lightly by hand).
    NOTE: The removed parts must be organized by installation location.
  3. Timing chain removal (bank 2 side)
    1. Attach the SST to the crankshaft.

      SST 18252AA000

    2. Turn the crankshaft using the SST to align the alignment marks of crankshaft sprocket, intake cam sprocket LH and exhaust cam sprocket LH.
      G12586504Courtesy of SUBARU OF AMERICA, INC.
      G12586505Courtesy of SUBARU OF AMERICA, INC.
    3. Push up the chain tension lever as shown in the figure and secure the plunger by inserting a wire (with a diameter of approx. 1. 3mm {0. 05 in}) into the holes of chain tensioner No. 2 and stopper plate.
      G11258464Courtesy of SUBARU OF AMERICA, INC.
    4. Remove the two bolts and chain tensioner No. 2.
    5. Remove the chain tension lever.
      G11258465Courtesy of SUBARU OF AMERICA, INC.
    6. Remove the O-ring from the cylinder block (bank 2 side).
      G11258466Courtesy of SUBARU OF AMERICA, INC.
    7. Remove the bolt, and remove the chain guide.
    8. Remove the timing chain.
      CAUTION:
      • When the timing chain is removed, the valve heads contact each other and the valve stems may bend. Do not turn the exhaust camshaft LH to the outside of the range of zero-lift (in range where they can be turned lightly by hand).
      • At this time, the No. 1 piston and No. 4 piston are located near the TDC of compression stroke. 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.
      NOTE: The removed parts must be organized by installation location.
    9. Remove the SST from the crankshaft.
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