could it be the oil pressure relief spring?
http://forums.pelicanparts.com/911-engine-rebuilding-forum/712724-ultimate-oil-pressure-relief-valve-thread.html
there are 2 and on that page a ways down there are measurements for both springs
part 930.107.531.01
Last edited by crashtest22; 01-22-2017 at 05:20 PM..
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