I have just ran my Nova Mega today and unfortunatley it blew 2 plugs and at the end I seem to not be able to turn the piston over at TDC, the piston runs cleanly in the sleeve, but at the top it is very dificult to turn over.
The piston has obviously had something tapping against it has pitting marks, which probably why the glowplugs went.
Not too sure if I need a new piston and liner though??
Anything else it could be??
Thanks
Tim