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Old 08-08-2015, 04:16 PM
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TopCatGr58 TopCatGr58 is offline
Join Date: Jul 2002
Location: Portsmouth, Va.
Posts: 12,621
I don't have anything to add to this discussion....but wanted to sorta hijack it a little with regards to ring installation....and a recent thread by RICHV that I've been posting in. I just posted about a theory I had as to why he's oil fouling his #2 cylinder. His engine was just rebuilt with honed cylinders, new rings, etc. He has great compression values in all 4, new valve seals as well, but still experiences oil fouling after about 20 or so miles of use.

I remember seeing a diagram /side view of the top 2 rings, and that they have an angled edge...the upper one to resist the compression pressure getting past it, the 2nd one positioned to help scrub/wipe the cylinders of excess oil downwards, along with the OIL rings. I remember there being stamps or indicators that showed which way was UP during installation of the rings. I was wondering if he had gotten the 2nd ring in his #2 cylinder upside down...that it wouldn't work as an oil wiper but possibly allow the oil to slip past it into the combustion chamber eventually fouling his plug?


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