Hi Sailnova, there is a little bit online about the actual keel and the bushing the keel pivots on.
From the above "With the age of all Cal 21's now, all owners should check this at least once to determine it's condition." it sounds like if you are getting leaking in through the keel pivot you are probably wise to get in there and check out what's going on throughout the whole system. I haven't removed a cal 21 keel from the pivot. I'd guess that you want to 1) remove the pivot, 2)take the keel out of the slot, 3) check rusting integrity of keel, 4) check keel slot/trunk (re-glass trunk if cracked or questionable) 5) throw it all back together. Are there gaskets around the pivot, maybe it's just shot gaskets? Anyway, this doesn't answer any questions, but a few things to look into. Anyone with details on the pivot connection, experience, or known pitfalls in this?