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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,567
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You want 4 or 5 mm between the top of the tensioner and the bottom of the tensioner guard. That way, in the winter and when the engine is cold there is some room to have everything shrink. With expansion the tensioner will get longer but in failure you want the guard to support the tensioner to keep the chain from jumping time.
The guard, in failure, becomes the mechanical tensioner.
Bruce
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