Hi, sorry to ask here, but I dont want to open new thread just for this question.
I have the same engine and with a help of a friend, we changed the chain today. But when camshaft locking tool was set and vanos units were out, we saw we forgot to unscrew the central bolt. During unscrewiung the flywheel/crankshaft unlocked and turned about(no more than) 40 degrees counterclockwise(against direction of engine rotatoin) . I did not here any noise. But do you know if there is a chance that the pistons and the valves had contact?
Thank you.
Ps. To anyone, I recommend experienced mechanik to do the job and with the right tools, so this can be avoided.