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Message: <blockquote data-quote="frogfarmer" data-source="post: 71920" data-attributes="member: 4075"><p>Could be the rear seal but with the broken bolts and now a leak I would check the runout on the crankshaft. Seal is mounted in a housing and relatively easy to change. Another place to look is the welch plug for the cam bore. I have replaced several of these on high hour engine builds that were leaking for a long time. Welch plug may be covered by the flywheel housing. If you are confident in replacing seals and know you wont do more harm than good replace the pump seal. If you are only considering doing the seal because someone suggested it was a good idea and have reservations due to your skill level leave it alone. Another issue to consider is if the crank bolts that broke were due to being over tightened they may have bulged the crank just enough to cause a leak. While you have it apart check everything you can just for piece of mind. Always a chance the seal caught a shaving and just needs replaced.</p></blockquote><p></p>