I've snapped my timing belt again on my (disco) 200tdi engine, It's bent 5 pushrods, but I can't see any other damage. I've had the sump off and looked up into the bores, everything looks fine. Question is how can you tell when timing the motor up if the cam is 180 degrees out to the crank? I.E. what is the position of the cam lobes on no.1 cylinder?