soullad wrote:any chance of a pic of the underside of the crown?
top of piston all black with some carbon buildDiablo wrote:Are there any signs it was running hot Scotty?
underside see pic
what do you think?
Hi mickMick Abbey wrote:Hi Scooty
Has the barrel been ported if so how wide is the Ex port and what shape is it as it looks like the rings have been bulging out into the port and causing them to chatter in the groove, this could be the cause of the problem as the rings are wire rather than cast they haven't let go and rolloxed the cyilinder as well as the piston.
can you post some pic's up of the ex port if it has been ported as this problem might be corected by re shaping the port to help the rings and stop them from chattering ( this can only be done if the port hasn't been cut to wide ) + if you can also mesure the width strait across the port.
Cheers
Mick
Diablo wrote:I've seen damage like that before caused by a ring peg coming out. Are both the pegs still in Scotty?
Hi Al and JimsJ1MS wrote:Definately a spun ring. Either the ring has jumped over the peg pushing it back or the peg has fell out.