On Sat, 10 May 2008 11:29:40 +0100, "Dave Plowman (News)"
wrote:

Would high temperature silicon sealer work better? It sticks like anything
to a clean surface.

It's hardly clean though.

This is a sump, it's not at any pressure, so just goop it up and hope.
"Oyltite" is the stuff - it's a stick of chewing-gum-like goop that you
squidge into the gap. Check the bolts too - you might find one is
actually missing and the leak is through the bolthole.

Also clean the crankcase breather. If that's blocked and the crankcase
is running under pressure, it'll make any sump leaks worse. It's a rare
sump leak that's this bad though.