i gotta say 2 it sounds like timing take the timing belt tensioner off and or take the whole belt off and see if the water pump is free or if it locks up after a while of turning it i did that and found out that the water pump was shot on mine a while back also temp would go up also if anything but it could have skiped like 1 or 2 notchs on the cams or crank did that before 2 mine dont sound or ever sounded that bad tho the cams should be top dead if im right and the crank should be 1/2 notch looked in car manual haynes but just my overlook it says bring crank back 3 or 2 notchs conterclockwise then bring to half a notch on crank an arrow dont know if that helps do you have a cover over the timing belt still?