So, my friend has a 190e with the m102.985 engine and we begun replacing the timing chain, we managed to remove the head and most of the chain but we are having trouble with the lower slider and the sprocket connected to the spark plugs thingy (I cannot remember its name). I searched through the forums and found nothing on that so I am writing here hoping someone can help me with that. I would also like to know how to properly sync the spark plugs thingy to the crank-cam because I am pretty sure it needs to be synced and the dumbass pulled it before marking it any way shape or form.