Another subject that came up at Rotary Roundup
was the proper sizes of the oil scraper O-rings.

Here is the pertinent message. I am sending a set to Chuck Dunlap
for testing as he is replacing his after they were over heated.
We shall see how they work.

I checked the installation of the oil O-rings with the new
sizes I got from Creavey. They worked perfectly and were
very easy to install. You will need a little O-ring lube
and a 2 by 8 to install them. They were also easy to remove
with no signs of distortion.

One of the secrets is if you reuse the old oil scraper rings
they must be spotlessly clean inside and out. Soak them
in carb cleaner for a few days. If you use new scraper rings
this will not be a problem of course.
The second thing to watch out for is don't nick the
rotor wall between the two scraper rings when you remove them.
Very very important!!

Hopefully we can talk Dave Lemon into stocking these custom size
teflon encap silicon oil O-rings. Everybody send a message to
Dave at Mazdatrix :-) As I said these can be the same or just a
little more than the stock oil O-rings from Mazda.

The proper sizes are:

0.093" section 4.68 inch ID
0.118" section 4.33 inch ID

I can vouch for the quality of the Creavey O-rings but some
of those water TES o-rings from Mcmaster Carr I have seen
are not as good. This is not to say they won't work. They just
don't look as good around the joints as Creavey O-rings.

Paul Lamar

mike h wrote:

Link to Creavey?

Do they have the same oring size & mat'l as the McMaster Carr inner water
orings?

Yes.

And lastly, what about the all-viton oil rings Atkins sells?

Mike Harrington
list newb

http://www.creavey.com/

Viton is good only to 400 degrees F. The center of the rotor runs
as high as 500 degrees F. I think 400 degrees F leaves too
little of a safety margin when 500 degrees F is available
in TES O-rings at the same price probably.

Paul Lamar

 
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