Can only speak as I find. Both had the cambelts snap after playing in the mud and wet, timing case ended up full of mud. When I took the engine out on one the bell housing also had mud in it which had affected the clutch.
A hard lesson learned - twice :-(
On the upside, the timing belt is easy to change and you only get bent pushrods, on one I just straightened them out and put em back in, fitted new belt and it fired up fine!