Cannot afford one of those for a one-off job Dave!
I will try Richard's suggestion as I do have a couple of spare unused rings from the same piston set. But I am not confident of accurately measuring the ovality with a feeler gauge between the ring and the bore. Trying to slip a flat feeler gauge between two curved surfaces doesn't seem very practical.
Ah yes Guy. I remember now. You had a complete spare piston didn't you? Just measure the rings, width and depth. The give Thorntons a call. Pretty sure they'll be able to match them for you.
But actually, unless it's an 'off the shelf' ring set, it may actually be cheaper to buy 4 new pistons. However, being +30, you'll have the same issue I had. Nobody makes +30 pistons anymore. Hence I re...
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