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Message: <blockquote data-quote="chasxjs" data-source="post: 105396" data-attributes="member: 17060"><p>I am rebuilding the engine in a Bobcat 753 that I purchased with the engine disassembled. The engine is a V-2203 The issue I have run into is the manual calls for o-rings to be installed in the timing cover around the ports that flow oil to and from the oil filter. My gasket set did not come with any o-rings for these ports and the ports are not grooved to accept o-rings. I guess my question is, was there some kind of production change that modified this to eliminate or modify the o-ring requirements? I tried to add a picture to show what I am talking about but did not see an option to add one.</p></blockquote><p></p>