FWIW. The 617.951 I rebuilt in 2004 had an oozing crack from the oil fill hole to the breather hole - all the way. I flushed it with isopropyl and trike, then pried it open just enough to get some high strength epoxy in it. 30K and 4 years, not a drop of seepage yet.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.