When my fan blew (but I did not know it) I knew something was wrong and tried to make it the 4-5 miles home . That was just a tad too far and the power had been tailing off until I had almost total loss of power about 300 yards to go at the bottom of a steep hill. When I opened the engine cover the heat was intense, the plastic fuel filter had blown up like an orange , was soft like a plastic bag and the petrol inside was bubbling with the heat. Vary , very scary which is why I will never use a plastic filter again. It was still pretty hot after about an hour & would not start.
All of the excess heat is around the top end , cylinders & head & in my case the stress made the cylinder head nuts loose and stripped the threads on the rocker mounting studs. However no major damage was caused so after a top end strip down and re-assemble the engine is now fine. I think I pushed my engine to the extreme limit at the time but if you only covered a short distance I suspect all will be fine but a good test would be to check cylinder head torque and tappet clearances
