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Home >> Mazda >> 2006 >> 6 s, 4D Wagon, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Mechanical [Service Information L3)) >> Valve Clearance Adjustment

Valve Clearance Adjustment

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the negative battery cable.
  2. Remove the tire (RH).
  3. Remove the splash shield (RH).
  4. Remove the plug hole plate.

    (See PLUG HOLE PLATE REMOVAL/INSTALLATION ).

  5. Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION ).
  6. Remove the oil control valve (OCV) connector.
  7. Remove the ventilation hose.
  8. Remove the cylinder head cover.
  9. Remove the drive belt. (See DRIVE BELT REPLACEMENT ).
  10. Remove the front drive shaft (RH) from the joint shaft. (See FRONT DRIVE SHAFT REMOVAL/INSTALLATION [L3, L3 WITH TC] ).
  11. Remove the engine front cover lower blind plug.
    Fig 1: Removing Engine Front Cover Lower Blind Plug
    G04324303Courtesy of MAZDA MOTORS CORP.
  12. Remove the engine front cover upper blind plug.
  13. Remove the cylinder block lower blind plug.
    Fig 2: Removing Engine Front Cover Upper Blind Plug
    G04324304Courtesy of MAZDA MOTORS CORP.
  14. Install the SST  as shown in the figure.
  15. Rotate the crankshaft clockwise until the crankshaft is in the No. 1 cylinder TDC position (until the balance weight is contacting the SST  ).
    Fig 3: Installing SST
    G04324305Courtesy of MAZDA MOTORS CORP.
  16. Loosen the timing chain.
    1. Unlock the chain tensioner ratchet using a suitable screwdriver or equivalent tool.
    2. Rotate the exhaust camshaft clockwise using a suitable wrench on the cast hexagon and loosen a timing chain.
    3. Placing the suitable bolt (M6 X 1.0 length 25-35 mm {0.99-1.37 in})  at the engine front cover upper blind plug, secure the chain guide at the position where the tension is released.
      Fig 4: Rotating Exhaust Camshaft Using Suitable Wrench On Cast Hexagon And Loosen Timing Chain
      G04324306Courtesy of MAZDA MOTORS CORP.
  17. Hold the exhaust camshaft using a suitable wrench on the cast hexagon as shown in the figure.
    Fig 5: Holding Exhaust Camshaft Using Suitable Wrench On Cast Hexagon
    G04324307Courtesy of MAZDA MOTORS CORP.
  18. Remove the exhaust camshaft sprocket.
    Fig 6: Removing Exhaust Camshaft Sprocket
    G04324308Courtesy of MAZDA MOTORS CORP.
  19. Loosen the camshaft cap bolts in two or three steps in the order shown in the figure.
    NOTE:
    • The cylinder head and the camshaft caps are numbered to be reassembled in their original position correctly. When removed, keep the caps with the cylinder head from where they were removed. Do not mix the caps.
  20. Remove the camshaft.
  21. Remove the tappet.
    Fig 7: Loosening Camshaft Cap Bolts
    G04324309Courtesy of MAZDA MOTORS CORP.
  22. Select proper adjustment shim.

    New adjustment shim 

    = Removed shim thickness + Measured valve clearance - Standard valve clearance (IN: 0.25 mm {0.0098 in}, EX: 0.30 mm {0.0118 in}) 

    Standard [Engine cold] 

    IN: 0.22-0.28 mm {0.0087-0.0110 in} 

    EX: 0.27-0.33 mm {0.0107-0.0129 in} 

  23. Install the camshaft and No. 1 cylinder aligned with the TDC position.
  24. Tighten the camshaft cap bolt in the following two steps.
    1. Tighten to 5.0-9.0 N.m {51.0-91.7 kgf.cm, 44.3-79.6 in.lbf}  .
    2. Tighten to 14.0-17.0 N.m {1.5-1.7 kgf.m, 10.4-12.5 ft.lbf}  .
      Fig 8: Tightening Camshaft Cap Bolt
      G04324310Courtesy of MAZDA MOTORS CORP.
  25. Install a new washer.
    Fig 9: Installing Washer
    G04324311Courtesy of MAZDA MOTORS CORP.
  26. Install the exhaust camshaft sprocket.
    NOTE:
    • Do not tighten the bolt for the camshaft sprocket during this step. First confirm the valve timing, then tighten the bolt.
      Fig 10: Installing Exhaust Camshaft Sprocket
      G04324312Courtesy of MAZDA MOTORS CORP.
  27. Install the SST  to the camshaft as shown in the figure.
  28. Remove the (M6 X 1.0 length 25mm-35mm {0.99-1.37in})  bolt from the engine front cover to apply tension to the timing chain.
  29. Turn the crankshaft clockwise until the crankshaft is in the No. 1 cylinder TDC position (until the balance weight is contacting to the SST  ).
    Fig 11: Installing SST To Camshaft
    G04324313Courtesy of MAZDA MOTORS CORP.
  30. Hold the exhaust camshaft using a suitable wrench on the cast hexagon as shown in the figure.
  31. Tighten the exhaust camshaft sprocket lock bolt.
    Fig 12: Holding Camshaft Tightening Sprocket Lock Bolt
    G04324314Courtesy of MAZDA MOTORS CORP.

    Tightening torque 

    69-75 N.m {7.1-7.6 kgf.m, 50.9-55.3 ft.lbf} 

  32. Remove the SST  from the camshaft.
  33. Remove the SST  from the block lower blind plug.
  34. Rotate the crankshaft two times clockwise until the crankshaft is in the TDC position, reinstall the SSTs  to the camshaft and cylinder block, and inspect the valve timing.
    • If not aligned, loosen the crankshaft pulley lock bolt and repeat from Step  16.
  35. Apply silicone sealant to the engine front cover upper blind plug.
  36. Install the engine front cover upper blind plug.

    Tightening torque 

    8.0-11.5 N.m {81.6-117.2 kgf.cm, 70.9-101.7 in.lbf} 

    Fig 13: Installing Engine Front Cover Upper Blind Plug
    G04324315Courtesy of MAZDA MOTORS CORP.
  37. Install the cylinder block lower blind plug.

    Tightening torque 

    18-22 N.m {1.9-2.2 kgf.m, 13.3-16.2 ft.lbf} 

    Fig 14: Installing Cylinder Block Lower Blind Plug
    G04324316Courtesy of MAZDA MOTORS CORP.
  38. Install the new engine front cover lower blind plug.

    Tightening torque 

    10.0-14.0 N.m {102.0-142.7 kgf.cm, 73.8-103.2 in.lbf} 

    Fig 15: Installing Engine Front Cover Lower Blind Plug
    G04324317Courtesy of MAZDA MOTORS CORP.
  39. Connect the front drive shaft (RH) and the joint shaft. (See FRONT DRIVE SHAFT REMOVAL/INSTALLATION [L3, L3 WITH TC] ).
  40. Install the drive belt. (See DRIVE BELT REPLACEMENT ).
  41. Install the cylinder head cover. (See CYLINDER HEAD COVER INSTALLATION NOTE ).
  42. Install the ventilation hose.
  43. Install the oil control valve (OCV) connector.
  44. Install the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION ).
  45. Install the plug hole plate.

    (See PLUG HOLE PLATE REMOVAL/INSTALLATION ).

  46. Install the splash shield (RH).
  47. Install the tire (RH).
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