The size I think we need for the outer oil ring is 4 3/4 ID 3/32" section
which should have an AS568A-158 number. The inner oil ring should be
an AS568A-157. That would be a 4 1/2 ID with a 3/32" section.
I could be wrong on this.

Paul Lamar

Ed Anderson wrote:

Thanks Paul,

Nailed the first one -158, but the inner oil ring appears to be thicker
(1/8")  than the outer (3/32)  so instead of a -157, Ken Powell and I both
think the -245 is a better fit for the inner. The $ savings over ordering a
set from McMaster vice Mazdatrix is around $70.  Around $20 for 8 rings from
McMasters compared to $96 from Mazdatrix.  Now if we can just find a
suitable 'O" ring for the outer coolant ring that would just about finish it
off.

Probably need to see if we can find a substitute for the Tension Bolt
washer-0 rings under the head.  I'll see what I can find.

Ed Anderson

If you can't get the exact size using standard part numbers Creavey Seal has some
intermediate section sizes. Do you have their catalog? http://www.creavey.com

Paul Lamar

Here is the pertinent section of their catalog.

Paul Lamar
 
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