I will outline what we are talking about.
There are four coolant sealing O-rings per rotor housing. 
Two outer and two inner.
There are also four oil sealing O-rings per rotor. Two on each side of
the rotor proper. These are located on the flanks of the rotor. 
Two per side.

http://www.creavey.com/

Coolant O-rings:

1.  Inner coolant oring - 
    
    circumference  = 28.625
    diameter       =  9.111
    slot depth     =  0.062
    slot width     =  0.141
    section size   =  0.103

2.  outer coolant oring - 
    
    diameter       = 11.340
    slot depth     =  0.062
    slot width     =  0.110
    section size   =  0.093

  
This is critical! The proper outer section size is 0.093. Not 3/32 inch
as a 3/32 inch  O-ring is bigger in section size than 0.093 inch.

The TES O-rings are stiffer than the stock O-rings. It is harder
to get them to lie in the groove. Even with Vaseline.  When you buy
them they don't come flat. I found that using a plywood
form to pre set the TES  O-rings works well. Here is a picture.


--------------------------------------------------------------
Oil O-rings.

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!!

These can be the same or just a little more than the 
stock oil O-rings from Mazda.

The proper oil O-ring 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.

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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