i just removed the cylidner head off my 1986 celica 3sge. i need 2 no how to set the piston/crank to TDC and how to set the camshafts 2 TDC i noticed my cam gears have got a little "nipple" and also a green dash mark. is putting these clostest together the setting for tdc? i just really dotn no about DOHC timing!! HELP EVERYBODYY!!!