Can anyone help. I had a leaking water pump and removed the timing belt to replace same. I have bought a new belt but cannot fit it as there are no timing marks on the camshaft sprocket (it is not the same as a petrol engine, as I soon found out). I can time the bottom end and fuel pump but I cannot get the camshaft to TDC. Would I be right if I got the cam lobes on cylinder one rocking then this would indicate that was TDC? I have since read that you need a special tool to do this job but surely someone out there has the answer.