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


Isn't Garnet basically the same as sand?
/Garnets/ (pronunciation: /ˈɡɑːrnᵻt/) are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. All species of /garnets/ possess similar physical properties and crystal forms, but differ in chemical composition.

Gary Knutson

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