Frank Blackstone Posted November 18, 2009 Report Share Posted November 18, 2009 I pulled the leaking rear main seal that has a rubber National 6405 number and now can not find an exact replacement. The configuration of the engine dictates that a rubber seal be used.I could not find a part number in the old Forum list. The parts houses do not have a direct Fel-Pro ,or any another brand ,substitute for tha National number. Is there a different size seal for the 218 and 230 size engines? Anyone have any replacement numbers that are available.? Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted November 18, 2009 Report Share Posted November 18, 2009 (edited) 46-48 D24 Crakshaft seal Rope type 5415 Bolton type 5400 1940-41 rope 5416 42 early 5415 42 later bolton 5400 49-50 Rope 5415 bolot on 5400 51-55 6cyl 51-up split type 5412 51 early bolt on 5400 53-55 v8 5414 1937-39 5416 Just saw on ebay item number 140270813155 1942-52 rope style sold by frank mitchell This info came from a NAtional seals catalog that I had a work with me. You just lucked out Rich HArtung Desoto1939@aol.com Edited November 18, 2009 by desoto1939 added info Quote Link to comment Share on other sites More sharing options...
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