Belt snapped an i have changed the valves i need
Fit them to the crank shaft, that gives you the rough positions. Given you have changed the valves in order and properly sprung you can set the bottom pully to the top(12 0'clock) position, noting which piston is at the top of its stroke, or vary it slightly so its at stroke, Check your head against the block and turn the cam so the inlet valve for that chamber is open. do the same with the next piston in your firing sequence, turning the camshaft accordingly, to ensure the inlet valve opens fully. Fit the gasket and tighten the nuts down lightly, set up the timingmarks by eye,fit the belt and by turning the bottom pully you should find there is no resistance between the piston heads and the valve seats, thats why you don't tighten the head down as not to damage the valves if not firing in line. You should be ok though, tighten the head down slowly checking the pistons and valve contact is not an issue, turning the engine with the socket a full revolution with every turn of the bolts. Once fully tightned, before torquing, turn the engine FULLY to ensure there is NO piston/valve contact, then fit all ancillaries, set timing using a standard strobe and the distributer. Hope this helps, it should do, Regards Dave