Mazda 3 Workshop Manual page 640

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
(1) Press down the link plate of the chain tensioner from the service hole on the left side using a
thin flathead screwdriver (precision screwdriver). Then rotate the crank pulley backwards
(counterclockwise) with the plunger lock released.
(2) When the timing chain loosens, shift the tensioner arm to the position shown in the figure at
the same time.
Note
• The timing chain presses the tensioner arm by the rotation of the crank pulley backwards
(counterclockwise).
(3) Rotate the bolt (M10 × 1.25) installed to the front cover by hand and insert it to the position
where it catches the inside of the rib on the tensioner arm.
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