Unfortunately the borescope did not lie.
The barrell is scored above the ring line for the whole of the stroke. The top ring was stuck in the groove between the 2 studs on the timing side but the piston was nice and free.
The grooves can be felt with or without running your finger nail round them and I was hoping to find a broken ring, but no such luck.
The skirt clearance is still 6 thou but at the top of the barrell it is 12 thou.
On inspecting the rings the top and second ring both have burrs turned up on their outer edges which at the moment I cannot explain, and maybe never will.
The piston is only lightly scored and I reckon that if I were to fit a new liner it would be ok, but that's not going to happen.
Could the new liner I fitted be soft? --Unlikely.
Still I'll order a new piston and maybe a liner and get the nice reborer to work his magic and see what happens...John
The barrell is scored above the ring line for the whole of the stroke. The top ring was stuck in the groove between the 2 studs on the timing side but the piston was nice and free.
The grooves can be felt with or without running your finger nail round them and I was hoping to find a broken ring, but no such luck.
The skirt clearance is still 6 thou but at the top of the barrell it is 12 thou.
On inspecting the rings the top and second ring both have burrs turned up on their outer edges which at the moment I cannot explain, and maybe never will.
The piston is only lightly scored and I reckon that if I were to fit a new liner it would be ok, but that's not going to happen.
Could the new liner I fitted be soft? --Unlikely.
Still I'll order a new piston and maybe a liner and get the nice reborer to work his magic and see what happens...John