Thanks to Paul and everyone who replied to my list of questions – That gives me enough information to keep me busy for a long time – But always welcome more info -

   After I digest some of the information I suppose I’ll have some other questions –

   Took a few of the OMC Wankel parts to the local airport to use the glass bead blasting machine – Works pretty well on aluminum as well as steel -


    Roland Friestad


Be careful using glass beads for any areas exposed to the combustion chamber heat. Aviation spark plug manufacturers prohibit cleaning plugs with glass beads or sand because it is impossible to get all of them out because fragments get embedded in the base metal. Using spark plugs as an example, the glass fragments will fuse and cause a short circuit. In the apex seal area I would expect it could cause issues with sticking seals. I use Garnet that I get from Tractor Supply in a big bucket for about $80.00 for blast cleaning engine parts.

I am overhauling a TSIO 360 and the manual prohibits using glass or sand for cleaning. Same issues.

Kevin Alderman

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