david mccandless wrote:

Hi Paul, I have been following the O ring trail for some time now and

would appreciate clarification on your point about specifying  cross section
dia as .093" and not 3/32".   Decimalised 3/32 is

.09375 ie 094"and the catalogue gives the manufacturing tolerance as

plus or minus .005 ", so 093 rings can have a cross section dia between .088
to .098 , so this falls well within 3/32 sizing.

Is it that when you order '.093' rings you get a different product than

when you order 3/32 rings?   What goes here?

BR, Dave McC

Yes you do.

I think it also depends on who you order them from. I have measured a so

called

"3/32" O-ring as high as .115. If you buy some from somebody other than

Creavey measure

them before you install them. This is critical. A too large silicone cross

section

O-ring can crack the cast iron when over heated.

Paul Lamar

Didn't have the pleasure to "play" with any Rotary yet, so excuse the basic
questions.

Are the O-Rings not measured in metric on the Mazda? What would be their OEM
size?

Thomas J.

Yes they probably are metric sizes. Mazda uses square O-rings on the water jackets
that are probably custom made for them. The round Creavey O-rings work fine however 
as long as they are exactly the right size.

Paul Lamar
 
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