Outback L.L.Bean Edition AWD F6-3.0L (2002)
Timing Chain: Description and Operation
Timing Chains
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Two timing chains are used to drive the camshafts, one each for driving the two camshafts on each bank. Every camshaft is fitted with a sprocket
through which it is driven by the corresponding timing chain. The left bank timing chain transmits the power from the crankshaft sprocket directly
to the left bank camshaft sprockets, whereas the right bank timing chain transmits the crankshaft power via the lower idler sprocket which is driven
by the left bank timing chain. (The lower idler gear has two tooth rows; the left bank timing chain engages with the inner row teeth and the right
bank chain engages with the outer row teeth.) By this way, the right and left bank camshafts rotate in synchronization with each other. The left
bank timing chain also drives the water pump.
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The hydromechanical automatic chain tension adjuster provided for each chain constantly maintains the specified chain tension necessary to
properly drive the camshafts, as well as to provide this chain and sprocket camshaft drive mechanism with a "maintenance-free" feature.
