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Timing Chain Removal/Installation: Notes

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing.
CAUTION:
  • If the camshaft is rotated with the timing chain removed and the piston at the top dead center position, the valve may contact the piston and the engine could be damaged. When rotating the camshaft with the timing chain removed, rotate it after lowering the piston from the top dead center position.
  • When rotating the camshaft using a wrench on the cast hexagon, the wrench may contact the rocker arm and damage the rocker arm. To prevent damage to the rocker arm when holding the camshaft on the cast hexagon, use a wrench on the rear side of the engine as shown in the figure to secure a clearance between the cam.
Fig 1: Identifying Clearance Between Cam
G09785080Courtesy of MAZDA MOTORS CORP.
NOTE:
  • Width at the cast hexagon of the camshaft is 22-24 mm {0.87-0.94 in}.
  1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .)
  2. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
  3. Remove the ignition coil/ion sensors. (See IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION .)
  4. Remove the front under cover No. 2. (See FRONT UNDER COVER NO. 2 REMOVAL/INSTALLATION .)
    Fig 2: Identifying Cast Hexagon Dimension
    G09785081Courtesy of MAZDA MOTORS CORP.
  5. Remove the splash shield. (See SPLASH SHIELD REMOVAL/INSTALLATION .)
  6. Remove the drive belt. (See DRIVE BELT REMOVAL/INSTALLATION .)
  7. Drain the engine oil. (See ENGINE OIL REPLACEMENT .)
  8. Remove the oil pan. (See OIL PAN REMOVAL/INSTALLATION .)
  9. Remove in the order indicated in the table.
  10. Install in the reverse order of removal.
  11. Refill with the specified type and amount of the engine oil. (See ENGINE OIL REPLACEMENT .)
  12. Start the engine and inspect the following:
    • Leakage of engine oil.
    • Runout and contact of pulley and belt.
    • Ignition timing, idle speed and idle mixture. (See ENGINE TUNE-UP .)
      Fig 3: Exploded View Of Electric Variable Valve Timing Actuator And Hydraulic Variable Valve Timing Actuator With Torque Specifications
      G09785082Courtesy of MAZDA MOTORS CORP.
      Fig 4: Identifying Cylinder Head Cover Clip
      G09785083Courtesy of MAZDA MOTORS CORP.
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