Блинн, полтора часа искал, где видел в пдэфке:
cam chain tension
start the engine and let it idle
locken the cam chain tensioner lock nut and lock bolt.
the tensioner will automatically position itself to provide the correct tension.
If the chain is still noisy remove the tensioner plug. gradually screw in the tensioner adjusting screw until the cam chain is no longer noisy.
Install the tensioner plug.
tighten the tensioner lock bolt and nut.