yellowss7 Posted April 15, 2016 Share Posted April 15, 2016 Hi Guys, my winter maintenance project has now bled into spring and I am anxious to get back on track. I know it's a long shot, but does anyone know what size O rings are used on the Cosworth Roller Barrel intakes? I got an email from my mechanic this afternoon looking for me to come up with the size so he could source them locally. I called Cosworth USA in Indy and they were absolutely useless, telling me the parts guy is in the UK and they are gone for the weekend. Hoping not to have to wait for Monday and hope someone gets back to me. Tom Link to comment Share on other sites More sharing options...
vstryker Posted April 16, 2016 Share Posted April 16, 2016 (edited) If you are referring to the 4 intake ports that mate to the head, then they are 53mm ID x 2.0mm thickness as I just replaced mine as well. Cosworth Part # PR0142 but any O ring with same dimensions will do. Good luck! Edited April 16, 2016 by vstryker Link to comment Share on other sites More sharing options...
yellowss7 Posted April 16, 2016 Author Share Posted April 16, 2016 Van, Thank you Very, very much! :flag: Tom Link to comment Share on other sites More sharing options...
coffee break Posted April 16, 2016 Share Posted April 16, 2016 Note: O-rings can be found in many rubber compounds. Look for materials that are oil & fuel resistant/compatible. Link to comment Share on other sites More sharing options...
yellowss7 Posted April 17, 2016 Author Share Posted April 17, 2016 Thanks, I'm looking for the Buna N 70 ones as they seem to fit those requirements. Tom Link to comment Share on other sites More sharing options...
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