08-02-2018, 08:57 PM
First of all, I'm no expert, but I reckon my eyesight is OK...
Looking at your photo of the piston and rings I can see that the top compression ring appears to have a tapered profile as there is no apparent contact wear on the lower portion of the ring face. The next ring down appears to have a shamfer on both upper and lower edges. Could these two rings be mis placed?
Furthermore, the two oil control rings have two contact faces, one of which is slightly wider than the other, although each ring is fitted upside down relative to its sibling. The fact that you've got the gap on the upper oil control ring coincident with the hole in the piston skirt would suggest that it's not helping much with oil control.
Just my observations, I might be talking bollocks. (it's usually the case!)
Looking at your photo of the piston and rings I can see that the top compression ring appears to have a tapered profile as there is no apparent contact wear on the lower portion of the ring face. The next ring down appears to have a shamfer on both upper and lower edges. Could these two rings be mis placed?
Furthermore, the two oil control rings have two contact faces, one of which is slightly wider than the other, although each ring is fitted upside down relative to its sibling. The fact that you've got the gap on the upper oil control ring coincident with the hole in the piston skirt would suggest that it's not helping much with oil control.
Just my observations, I might be talking bollocks. (it's usually the case!)