G'day tiger,
there is scoring on the piston and top ring, I cant see if there is any in the bore.
I would replace the rings and reuse that piston. Make sure scored metal has not entered the ring groove.
(Give the scoring a light clean up)
Forum members have taught me in the past to, carefully remove the rings (they can snap)
Removing the old ones is practice for replacing the new ones.
Then clean carbon out of the ring grooves using a piece of old ring ground flat so that you can use the edge as a scrapper.
Try not to remove any metal.
The intent is to have a snug fitting ring that can move freely in its groove.
Things to notice: where the pins in the grooves are located to avoid the transfer ports, how the ring fits around the pin when compressed, thickness of rings.
Last edited by mark electric; 30/12/12 12:58 PM.
