Well drove to meet heard a rattle thought cam was rattly. Engine cut out as got in carpark of pub would not start so left it for a bit.came to.it when time to go started fine had oil pressure just a little rattle then set if home lol drove at 40mph all the way home as the rattle was like marbles in a tin can but still had oil pressure so thought it was cam due to having oil pressure.changed cam started it up and no the rattle was still there so pulled engine out and took sump.off and no 4 big end has gone oops.so need a crank regrind and a check of a old crank I found from a 2litre which looks good but will jo when get it checked and then get some shells and refit and hope is all ok