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TIMING CHAIN, CHAIN TENSIONER CONSTRUCTION [ZJ, ZY]

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• A silent chain has been adopted for the timing chain to reduce noise caused when the timing chain is engaged with sprockets.
• Engine oil inside the engine front cover lubricates the timing chain and each sprocket. The pin part of the timing chain has special surface processing to improve wear resistance.

• A chain tensioner employing a ratchet in conjunction with hydraulic pressure has been adopted for the timing chain tensioner.
• The tension of the timing chain is constantly maintained using oil pressure and spring force in the chain tensioner.
• The chain tensioner is composed of a ratchet which controls the plunger movement when the engine is started, a plunger which presses the tensioner arm, a plunger spring, and a check ball which maintains hydraulic pressure.