What a great looking 944S! I enjoyed mineóuntil the day it died. (It was reborn by a friend and now lives in Arizona, fortunately.)
Iím sure you are aware of the cam chain tensioner ramp? Have you pulled the valve cover to inspect it? If not, donít drive it further until you do. Mine failed on my 944S, causing catastrophic damage. The heads are basically unobtainable anymore due to so many being damaged beyond repair due to this failure.