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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Mechanical System (VIN M)) >> Timing Chain Removal/Installation >> Timing Chain Removal Note
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Timing Chain Removal Note

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  1. Rotate the crankshaft clockwise to align the timing marks and the key position as shown in the figure, and set cylinder No. 1 at top dead center (TDC).
    G13672148Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • The timing mark is not parallel with the upper surface of the cylinder head.
  2. While moving the exhaust camshaft back and forth in the direction of the arrow using a wrench on the cast hexagon, press down the link plate of the timing chain tensioner using a precision screwdriver and release the plunger lock.
    G12188692Courtesy of MAZDA MOTORS CORP.
    G11436824Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • When moving the exhaust camshaft back and forth, the timing chain pushes the plunger in the chain tensioner making it easier to operate the link plate.
  3. Push back the plunger slowly in the direction shown in the figure with the link plate still pushed down.
    G11436825Courtesy of MAZDA MOTORS CORP.
  4. Remove the screwdriver from the link plate with the plunger still pushed down.
  5. Release the force slightly from the plunger, and move it back and forth 2-3 mm {0.08-0.11 in}.
  6. Insert a wire with an approx. diameter of 1.5 mm {0.059 in} or a paper clip where the link plate hole and the tensioner body hole overlap to secure the link plate and lock the plunger.
    G11436826Courtesy of MAZDA MOTORS CORP.
  7. Remove the chain tensioner, tensioner arm, and the chain guide (No. 1).
  8. Remove the timing chain.