Ok start at the beginning; drain some of the coolant and remove the top hose, remove the top cam cover to expose the cam pulleys, remove # 1 spark plug and insert a clean rod or clean wooden dowel into the spark plug hole, it needs to be about 12 inches long and ? diameter approx (not too short that you loose it down the hole) turn the crankshaft and watch the rod go up and down. When the rod is at its highest point and the crank pulley is at zero that will be top dead centre. Now check the cam pulleys are aligned with the match marks on the cover, both should be at the top.
If they are not, remove the cam belt and reposition them to the correct position. Reinstall the cam belt, remove the CPS and reinstall as stated in the online cygnusx1
MK3 TSRM On-Line