> The proper oil O-ring sizes are:
 >
 > 0.093" section 4.68 inch ID
 > 0.118" section 4.33 inch ID ????


There are two different sizes. Here is an old message on the subject.
It is easy to measure the size of the cast iron oil scrapper rings
and check.

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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

Paul, in the master rebuild kit Tracy sells does it have these o-rings
T.W.

No it does not. I hate to say this as Tracy needs all the money he can
make but I found a quality control problem or two with his rebuild kit.
One rubber oil O ring he sent had a large gouge out of it. His improvised
tension bolt seals (washer & O ring)  are not as effective as the
stock Mazda bonded rubber seals.

Also the apex seals he ships do not seal as well as the stock Mazda apex seals. Initial compression pressures are 10 to 20 % lower than stock.  I can't
say what they will do long term. The stock Mazda apex seals are very sophisticated
indeed being heated with a laser and chilled in liquid nitrogen.
The stock apex seals also have a very slight crown to them which I don't think
Tracy's seals have. Now it may be Tracy's apex seals stand up to
turbo engine detonation better but I have no data on that. There has been
very little feed back on the new Mazda 2 piece seals replacing the old Mazda
three piece seals that were prone to fracture under turbo engine detonation.

However Tracy has done a great job building low cost gear boxes and engine
computers.

Paul Lamar