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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - Overhaul - SKYACTIV-G - 2.5L >> Timing Chain Assembly >> Timing Chain Assembly Note

Timing Chain Assembly Note

  1. Verify that the timing marks and the key are aligned to the position shown in the figure.
    Fig 1: Identifying Timing Chain Alignment Mark
    G09757314Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • The timing mark of SKYACTIV-G 2.5 is not completely parallel with the upper surface of the cylinder head.
    • If they are not in the position shown in the figure, rotate the camshaft and crankshaft to set the cylinder No. 1 top dead center (TDC).
  2. Install the timing chain while aligning the marks on each sprocket and the timing chain as shown in the figure.
    Fig 2: Identifying Timing Chain Alignment Marks On Sprocket And Timing Chain
    G09757315Courtesy of MAZDA MOTORS CORP.
  3. Install the tensioner arm.
  4. Install the chain tensioner.
  5. After installing the chain tensioner, remove the installed wire or paper clip, and then apply tension to the timing chain.
    • If a new chain tensioner is used, remove the installed stopper.
  6. Install the chain guide (No. 1).
  7. Verify that there is no looseness in the timing chain, and re-verify that each sprocket is in the specified location.
    Fig 3: Identifying Stopper And Link Plate
    G08348147Courtesy of MAZDA MOTORS CORP.
  8. Rotate the crankshaft clockwise two turns and inspect the valve timing.
    Fig 4: Identifying Cylinder Head Upper Surface And Timing Mark
    G09757317Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • The timing mark of SKYACTIV-G 2.5 is not completely parallel with the upper surface of the cylinder head.
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