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Hi Jim,
I understand the feeling about tearing it down again. I had white "smoke" when I was losing coolant into the combustion chamber - however, that was only on start up. Once the engine was running for a few minutes the white smoke no longer existed. Oil will also cause "white smoke". If I had to guess base on this information, I would say there is a chance your oil "O" rings are not sealing properly. Running the engine to a higher rpm and higher oil pressure would cause more oil flow into the center housing where it could have more change of getting past the oil "O" rings and into the combustion chamber. So increased RPM => Increased Oil pressure => increased oil flow=>more smoke.
So not certain but I would say the oil rings. I presume you paid attention to the direction of rotation when you placed the "O" ring springs under the "O" ring metal holders - its important. Also, I always press the oil "O" rings in with the used metal rings sitting on top of the new rings to get even pressure so as not to distort the new rings. The oil rings should move up and down in their slots.
Unless there is another source of oil such as an oil leak that might get into your intake manifold - I would put my money on an oil leak.
Ed
If you are not losing any coolant or seeing bubbles in your coolant
----- Original Message ----- From: "James Brewer" <alpha@concordnc.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, August 19, 2005 3:13 PM
Subject: [FlyRotary] Rotary Diagnosis please
Guys,
I need some help on my recent 13B rebuild for my '87 RX7. Thanks to all previous replies on the crank angle sensor/TDC
settings I was able to get it to crank and run. Now for the diagnosis of my present problem: Engine starts and idles with a slight
amount of smoking. As the engine warms up and I increase the RPM I get a considerable amount of smoke. The smoke does
not smell "sweet" like it is burning coolant but maybe it smells different in a rotary. Smoke is white not black. With limited running
I haven't noticed a drop in the coolant or coolant in the oil. Before I pull the engine and go thru it again I would like to pinpoint the
problem before teardown. I thought I was careful about the o-rings. I used Hylomar for the grooves as per Bruce Turrentine's tape
to keep them in the grooves. Am I getting oil past the oil o-rings? Other sources or causes for my smoke? Tests I need to run?
Help! Ed, Lynn, Leon or others.
Jim Brewer
Albemarle, NC
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