TDC is when number one piston is all the way up with both intake and exhaust valves closed. you can pull number one spark plug and stick something in there, screw driver or whatever then turn over the engine by hand with socket and ratchet on the crank pully. until the piston is all the way up. normally you would have the dizzy in to verify the rotor is at number one but since you didnt put it at TDC before you pulled it you are going to have to find another way it verify your on the compression stroke and both valves are closed and your not on the exhaust or intake stroke. you could pull the valve cover and physically look at the valves, there may be an easier way try googling it
If you have any questions on anything, look it up on youtube before. it will help to understand it after you see it being done
Last edited by The_ocho; 04-20-2012 at 04:56 PM.