With all the recent discussions of smoky exhausts on A65's IM wondering if anyone has managed to find a three piece oil control ring which should be much better at controlling oil consumption.
Looking at the original A65 workshop manual
(65-68), it mentions that the first ring is plain, the second ring is tapered (presumably to help reduce oil consumption) and the third oil control ring is plain but with two scraper edges. This is interesting as all of the rings I have used (JCC, Gandini and even Hepolite) have never been supplied with a tapered second ring. Even looking at the Hastings ring catalog shows that the first and second rings are identical with no taper and the oil control ring appears to be single piece.
On my B44 which had smoking issues, I eventually resorted to using Cords Duraflex rings which use a three piece oil control ring and a tapered second ring. These rings were recommended by the now defunct OJT engineering co in the UK and did cure the problem.
Three piece oil control rings generally consist of two thin scraper rings separated by a corrugated spacer. I Assume they work by being much thinner and are therefore able to exert greater pressure on the cylinder allowing quicker bedding in.
IM was wondering if a three piece oil control ring is available for A65's and if so who sells them?
I might contact Cords Duraflex and see if they manufacture a suitable ring set. Not sure if anyone else has used this type of ring on an A65 but it certainly helped my B44 smoke problem.
Thoughts and comments welcome.