It appears the oil control rings are the root of my smoking problem. The mildly ported 6-port engine has 4000 miles on it and the smoking is getting worse. It started smoking about the 2000 mile mark. Fortunately its not that big of a deal to pull the engine. I have a spare 6-port I'll use for a few weeks then put the repaired-rebuilt engine back in. With the engine out we can inspect everything real good, again, and my engine builder can tweak the porting a little bit more. Enlarge the secondaries just a hair and maybe the exhaust port. Not going to touch the primaries.

That sucks, nice that you have a spare though.

On the bright side I'll do some of the oil mods we've seen in the Rick Engman is building my engine thread. I've got adequate oil pressure. Just basic cleaning up of the passages and such.

Good luck, and it's good to see someone else from Alabama. https://www.nopistons.com/forums/pub...IR#>/smile.png

why did they fail so soon?

I'm soon to find out. I was driving the car every day. But yesterday it appears to have gotten worse. I'm taking Friday off to start on the engine swap. Going to avoid driving the car least I do more damage.

wierd. maybe you spun a ring? usually they last a long time, unless you reuse questionable ones, or something

MAZDATRIX INFO



O-RING

We measured everything twice, each. So everthing was measured a total of 4 times. They were used rings but the engine didn't smoke before the rebuild. It had a cracked center plate that leaked coolant into the oil pan. The engine would start and made good compression. But such is life with a rotary engine. We'll fix and be done with it.

My oil pressure does drop a little when its warmed up but that o-ring doesn't cause smoke from the exhaust does it?