there are seals on the shaft that keep oil from leaking out. they look like little piston rings, there are 2 on each end. they can and will leak oil.
if you have your muffler off check the shaft for play. if oil is coming out, have it rebuilt.
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86 930 42kmiles [_ _] RUNNING: [__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [_ _] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [_ _] RUNNING: [__] NOT RUNNING:
90 B2200 [__] RUNNING: [ ] NOT RUNNING:__2000 MER E320 WAGON [] WRECKED: [ ]RUNNING:
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