I looked at just taking the pistons out and leaving the rings in their grooves, balancing and then carefully refitting without honing (there are still hone marks in the bores) which initially made sense. A bit of searching online found loads of people saying no don't do it but weirdly no real reason why not other than it's bad practice.
Other theories include added stress to the rings from opening and then closing or that rings don't rotate so unless they go back into the bore in the exact orientation that they ran in in they won't seal correctly. If this is true is it also impossible to remove the conrods leaving the pistons in the bores? They are the push fit circlip type.
I want to do this build properly but the price of rings seems to have doubled since I last did a build. There is no wear at all to the bores. Is it totally wrong to reuse the rings and only going to end in an oil burning nightmare? Has anyone even tried it?
With a planned red-line of 6500rpm based on the MG Metro cam's power-band is balancing of the rods and pistons even really needed?
With regards to cleaning the block and also drilling/tapping the galleries is this really sensible with the pistons still in the bores? I really don't want swarf floating about!
Sorry for the long post, I know it's been done to death but I can't find anything definitive or even backed up, other than the generic "I reuse rings all the time and get better performance because they get better as the get older" type nonsense.
Edited by James_1, 28 June 2012 - 11:35 PM.