I got a B7 A4 3.2 the Left Driver head had bent valves so it was rebuilt.When i removed the left head i saw piston 4 raised up all the way to the top and piston 5,6 sunken in all the way.The cam lock on right head and crank lock pin went on smooth.so i thought i was at tdc now i believe i might be 1 full crank rotation out of time.After I put the head back.The crank rotated 180* but then the left head cams spun 1/4 turn and got stuck.The crank locked and will not turn clockwise anymore only counter clockwise and i shouldnt rotate backwards much. At tdc is piston #4 raised up all the way or is it sunken down?can someone comfirm the piston position at TDC for the left and right head?I saw a picture of a 3.2 block were piston 1 was raised up to the top 2,3 sunken in.The left head pistons 4 and 6 were sunken down and 5 was raised up.is this the correct piston position for TDC?Thank you for any help