• 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.
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1
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Camshaft sprocket
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2
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Tensioner arm
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3
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Chain guide
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4
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Chain tensioner
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5
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Crankshaft sprocket
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6
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Timing chain
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7
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Pin
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8
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Guide plate
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9
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Inner plate
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10
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Middle plate
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• 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.
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1
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Check ball
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2
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Body
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3
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Cam spring
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4
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Ratchet
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5
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Plunger
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6
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Plunger spring
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7
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Stopper (attached to service part)
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8
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Link plate
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