Timing chain, sprockets and tensioner - examination and renovation

1 Examine alI the teeth on the camshaft and crankshaft sprockets. If the teeth are “hooked” in appearance, renew the sprockets.

2 Examine the chain tensioner plastic sprocket for wear. If excessive wear is evident, the complete tensioner assembly must be renewed, as the sprocket cannot be renewed independently. Note that the tensioner plunger assembly must be renewed whenever the timing chain is removed.

3 Examine the timing chain for wear. If the chain has been in operation for a considerable time, or if when held horizontally (rollers vertical) it takes on a deeply-bowed appearance, renew it.

    See also:

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