Jeff5627 Posted June 14, 2015 Share Posted June 14, 2015 I have a leak between the valve block and master cylinder on my 89 Reatta. Is there any source for replacement o-ring that go in-between valve block and master cylinder? Then 2015 BCA National was great, made some new friends and found some old parts. Thanks Link to comment Share on other sites More sharing options...
Guest Rp1967 Posted June 14, 2015 Share Posted June 14, 2015 (edited) You will need o rings made of EPDM in the appropriate size.O rings are sized in groups based on thickness.0 ,1,2,3 etc the higher the number the thicker they are.Yours are probably 0 or maybe 1 seriesAn 013 would be about the OD of a dime for reference.An 008 would have about the OD of a pencil.0 series o rings are approx .070 inch thickMcMaster Carr or Granger stock these. Edited June 14, 2015 by Rp1967 (see edit history) Link to comment Share on other sites More sharing options...
Guest Rp1967 Posted June 15, 2015 Share Posted June 15, 2015 Took a pic of the prong size chart , 0 series are 1/16 inch so .064 thickness.015 is dime size OD Link to comment Share on other sites More sharing options...
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