phil.c Posted April 29, 2013 Share Posted April 29, 2013 I have a problem with an oil leak that looks like its coming from the pulley crank nut [ not the back of the pulley] and flicking oil around. The pulley seal was changed so fairly confident its not that. Is there a seal that should go behind the nut? Phil Quote Link to comment Share on other sites More sharing options...
deadline Posted April 29, 2013 Share Posted April 29, 2013 How worn was the shaft from the previous seal? Typically seals will wear a grove into the shaft they are sealing against, and if its deep enough the seal will leak. The other source of a leaking seal is the recess that the seal is fitted into is out of round/damaged and allows oil to get by. You're going to have to take the nut/pulley/timing cover off and look at the timing cover seal recess for damage and the crank shaft for wear. The crank shaft could be sleeved (Speedy Sleeve is a common product) or the timing cover replaced. You could also have put the seal in backwards, or damaged the lip of the seal during installation. In any case time to take things apart and have a look-see. Quote Link to comment Share on other sites More sharing options...
phil.c Posted April 29, 2013 Author Share Posted April 29, 2013 Thanks for your reply. The leak is actually coming from the nut in front of the pulley so am I right to assume that if the leak was at the seal it would come from the back of the pulley? Phil Quote Link to comment Share on other sites More sharing options...
deadline Posted April 29, 2013 Share Posted April 29, 2013 There is no oil galley or other supply of oil past the timing cover oil seal. The pulley key way is forward of the seal, and the nut it screwed on. The oil might be dripping down from the oil filter supply line... but that's an easy check (did you install the rubber grommet that goes in the hole on the oil filter bracket that the oil supply line runs through?) Most likely you have a wear spot on the crank from age, or the seal itself if bad/installed wrong. Did you reinstall the oil slinger and gasket that is supposed to go on the crankshaft in front of the timing gear? Did you put sealant in the bore of the timing sprocket? A copy of TM9-803A has all this information. Quote Link to comment Share on other sites More sharing options...
phil.c Posted April 30, 2013 Author Share Posted April 30, 2013 Thanks again for reply, that gives me something to go on so will look at the weekend Quote Link to comment Share on other sites More sharing options...
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