[924Sman]

I think it is off 180....Slam is correct...2 revs per one to the cam. When off 180 you now have the exhaust on the firing mode instead of the intake. Simply put...the cam will match TDC one for intake the other for exhaust so you want the TDC at the correct timing.....Try this...remove the belt and leave the cam where it is then spin the crank off time the same direction and degree. This will allow you to be close enough in time to readjust with the belt and avoiding bending valves. Do remove all four plugs as it helps reduce any compression resistance so if the valves/pistons hit, the resistance will be much greater than the compression. If there is too much resistance when doing this you will feel it....DO NOT force it to spin!! But if no or little resistance is there then slowly spin the crank to TDC along with the cam.

But to be more certain find someone in your locale to help you!!!! You are now in deadmans land. Being this is something you know nothing about you need someone who does. Trying to fix by reading opinions is not the best way to save yourself here.....get an expert on site to work you through this. As you can see many ideas have come about and all or none could be correct, this is like diagnosing cancer from 1000 miles away, you need an expert who can determine exactly where it stands to avoid a possible engine failure.

If you remove the cam housing do use a metal ruler long enough to slip under the followers(aka lifters) when tilting back towards you then hold the ruler under until you can slip the housing off_use a helper to do this. Your help can see the followers as you tilt the cam house and prevent the followers from dropping out. Also be mindful of the housing pins(dowel rod like posts) located on the corners(middle right&left) they are inline with the top of the "P" and "E" in the Porsche embossing. ...So in simple terms you must lift the housing up and back towards you from the fender side to clear the pins. Any resistance ...stop and lift a bit higher to clear the pins. DO NOT bend or cause the pins to be pulled out with the housing. The pins are around 1/4 inch in diameter and stick out of the head about 1/2 inch. DO NOT use a prybar to help aid removing the housing!!!

As you can see from my reply this job now requires some finesse and I highly advise you to get a knowledgable helper before you create more pain and suffering for yourself, this is not a job to play the hero right now!!

Do read up on any material by Porsche to help you along as well as Clark's before you even lift a finger to repair at this stage.

Good luck!!!
Dal