Got my head off today following on from the low compression threed..
Head gasket looks OK!!!! no signs of damage or blow thru, but when cranking engine with sump off heard copious ammounts of flow past rings!! hisssssssssssssss...
Anyway.. Clearly not exactly brilliant results, what do you make of this?
Thats what i saw on a couple of the exhaust side pistons.... not good
but the valves look undamaged and the compression wasnt *THAT* low!?!?!
On the head you can see contamination damage too,, on the pistons matching up also, and some shards of metal still lodged in some of them.
However, so my supprise the cylinders themselfs looked ok, there was a minor vertical score on 3 which i could just feel with my fingernail(far right in pic, none of the rest was any more than just visible), other than that, no ridges at the tops at all, and no other damage visible on any of them(not that i know what im looking for).. however i was supprised to see horizontal scoring, its not anything you can feel, however in the sunlight it looks like someone has been at them with some 600grit sandpaper in hand to hone them or something
Surely if they were already on their second set of rings the cylinders would show signs of wear/ridges??
So..... any ideas? is it likely new damage and parts of the pistons in the pictures imbedded in themselfs... and the valves just survived? how can i tell if they're bent slightly?
Or is it more likely this has been apart before after interferance, had new rings/valves etc etc??
Do i need to buy a measurerthingymajig and measure the cylinder bore you think? Or just get stock rings?