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Small oil leak at the alternator shaft
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My engine is bone dry except for just above the oil pan at the bell housing.
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Joel: Did you buy your Liberty with the batteries all hooked together? or did you do it?
When you run the OTR for 8 to 12 hours, are you moving or sitting?
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Dick: I hooked all batts together about 10 years ago except for 1 batt on gen which has an isolator I put in. I’ve had several failures (on 2 coaches) of those blue finned isolators so I got rid of all of them.
OTR runs if it’s over about 80F while I’m traveling. Also runs while stopped if the cruise-airs are inadequate, which is often where I travel. I can usually switch to cruise air if it’s under 95 and sunny or under 100 and dark.
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A rear sea leak will show oil at the weep hole in the bottom of the bell housing. If the block is wet above the oil pan it probably is not the rear seal leaking. Rear seal leaks are pretty rare.
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I dropped the oil pan and replaced the seal hoping that was the problem. It wasn’t. I am getting some oil at the bell housing end of the oil pan, on the bell housing up as high as the oil pan seam or a little above.
I can clean and dry everything and in about 5000 miles there is a film of oil on the areas mentioned above. So I clean it with brake cleaner and plan on doing it again in 5000 miles.
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When you did the oil pan gasket did you replace the isolators? If they have gotten weak the pan will not seal like it should.
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Yes, and I stayed in the middle of the specified torque range.
The original gasket had about 156,000 miles on it and the perimeter I could see had two dark spots (not wet) where oil had seeped out over 13 years. I cannot see the perimeter at the bell housing end.
I took special pains to keep the oil pan exactly equidistant from the bottom of the block when the pan was installed and I used the sequence diagram for tightening. I am fairly certain my issue has nothing to do with the pan or its gasket.
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Equidistant Jon? I like that. Ive looked that up for future vocabular praxis.
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It was a lot easier saying equidistant than it was trying to hold the pan directly parallel with the bottom skirt of the engine block so I could get a few bolts started without smooshing (technical term) the sealing gasket in one spot and damaging it.
The Series 60 pan may be aluminum, but that sucker is big and heavy.
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The DN50 Seems like a continual source of leaks. Front seal has been replaced twice, the plug on the side was replaced by Prevost last September for the second time, and it loosened up on our last trip. Tightened with an Allen wrench did the job so far, but on the same trip, the drain hose installed by Prevost 2 years ago is leaking badly. I’ll have Prevost look at it again on our next trip up to Ft Worth, but still waiting on Marathon to get CruisAirs in before we make the trip. Never had an oil leak on our Cat!
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