Quote:
Originally Posted by Barry_R
The downstroke flow of some residual combustion gasses through a gap help to move scraped oil toward the piston's drainbacks and the sump. Lacking any downward impetus, the oil will cause the second ring to eventually hydroplane and the oil can contaminate the combustion chamber. |
Barry - I've heard about that, the early Z06 engine had an oil consumption problem which was rectified by going to a slightly greater preload oil scraper rings. Erring on the side of a stiffer oil ring was recommended to me with a gapless.