Hi guys

We are just finishing our Glasair SIIRG with a Renesis 4 port.
Started her up after finishing main wiring and she burst into life. (without prop at the moment).
~70psi oil pressure oil and water temps building. Ran it for 5 mins or so before shutdown not wanting temps above 200.
We worked out that if we lifted the tail up we could get some more air out and water in.
I have some questions/concerns:

1. Gurgling sound emanating from oil filler/breather with white substance on the oil dip stick. Concerned water may be getting into sump. What are the symptoms of o-ring failure? So much to learn re rotaries.

2. If we do need to tear it down, any great sources of how to go about it. Remembering years ago seeing Bruce T had a video?

3. We are working on an expansion tank design and wondered if someone could share the important elements of a good cooling system design. Looking at photos of other aircraft I’ve seen lines to expansion tanks from A. Rear iron port. B. Radiator tank top. etc. A. Is height of tank significant? B. Volume required? C. How much air should be left in the tank? D. Cap style?.

So much appreciate having this list.


Steve Izett
Perth Western Australia