Mazda 3 Workshop Manual page 690

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
7. Turn the crankshaft clockwise the crankshaft is in the No.1 cylinder TDC position (until the balance
weight is attached to the SST).
8. Loosen the timing chain.
(1) Unlock the chain tensioner ratchet using a suitable screwdriver or equivalent tool.
(2) Turn the exhaust camshaft clockwise using a suitable wrench on the cast hexagon and loosen
the timing chain.
(3) Placing the suitable bolt (M6 X 1.0 length 25mm-35mm {0.99-1.37in}) at the engine front
cover upper blind plug, secure the chain guide at the position where the tension is released.
9. Hold the exhaust camshaft using a suitable wrench on the cast hexagon as shown in the figure.
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