I am not that familiar with the layout of a 30B.... but I have a couple of ideas where you could check...
The teak portion of the rub rail on my boat does not make complete contact with the glass hull because they routed out the center 1/2" about 1/8" deep. It only makes contact on the outer edges and is not bedded fully in caulk. The screws go thru the center of the piece and pass thru this 1/8" air space. If the rubrail is not making full contact or is not bedded in caulk on the BOTTOM then when you heel water is driven up into the space and would travel the length of the space till it finds a screw that leaks. Hence a leak only when healed, underway and in one spot only. I have found a couple of gaps in the top of mine and I have caulked them.
The second thought is on my boat the rudder post passes thru a stuffing box just like the prop shaft except bigger. The packing has given it up and the shaft leaks only when underway and a little worse when healing. On my boat the water runs down and into the engine sump. I am not that familiar with a 30B so if your rudder shaft is in a different spot and a heal..this may be the source.
A third possibility is to check the stern thru hulls. My bilge pump exits through a fitting on the stern and it was leaking slightly whenever the pump cycle and whenever I got a good wave slap from a following sea. Despite a well tightened hose clamp I had to resort to using 5200 to make it water tight.
A good way to diagnose these leaks is to dust the area with powder of some kind... preferrably one that cleans up easily and then watch for the streaks. The tinyest rivelet of water can put an amazing puddle in a locker.
Hope this gives you some place to start. If you would like I can send you a sketch of the joint since I have had mine off searching for leaks.
Boyd
will parker wrote: Boyd,
These leaks are a mystery. The evidence of the leaks is the aft locker in my quarter-berth (Cape Dory 30B)fills with water when under sail with sufficient heel to put the rail under water. There is no leak when it rains. Moreover, the forward quarter-berth locker (separated from the aft one by a plywood panel) stays dry. I am assuming the leak must be from the toe-rail on the starboard quarter because i can't imagine any other cause. Watching for the leak is a practical impossibility because there is simply not sufficient access.
But to the extent I can see, I have never found evidence of water coming in from the rail. The stuff in my starboard cockpit locker stays relatively dry. Gremlins????
Will
"Jambalaya"
CD 30B
Boyd wrote: Hi Will...
One way you might fix your leaks without removeing the toe rail is to locate which screws are leaking by watching from underneith. Remove the bung and the screw. Dry out the hole with a heat gun or hair dryer...carefully. Compressed air might help also. Take the nozzel of a caulking tube of 101 or tan lifecaulk and stick it into the hole from above. Fill the screw hole with as much caulk as possible without making a huge mess. Put a little caulk on the screw just under the head and put it back in. Reset a bung by putting a little more caulk on the top of the screw and tap in the bung. I look for a little caulk to ooze out around the edges of the bung. Check inside for excess caulk and smear some of it around the end of the screw. Wait for the next day and slice off the bung and excess caulk.
I have done this on my rub rail with success so far. Beats taking the whole thing off.
I did take off a section of the toe rail and rebed..almost every screw was leaking on the rear stbd section.. I had to take that off... found a really weird condition with it. Someone had put saw cuts along its entire length .. practically guaranteeing a leak situation.
Boyd
s/v Tern
CD30 MkII
Fort Lauderdale, Fla
will parker wrote: Larry et al:
I discovered leaks from stantions and from bolts holding genoa track to toerail. When I removed the leaky bolts (with great effort and many words) I discovered in each case the offending bolt had a slight bend in it. In other words, whoever had installed them (either Cape Dory or the prior owner) had over-torqued them to the point of bending. I replaced them with new bolts, tried to avoid over-torquing, re-bedded them, and have had no further leaks FROM THOSE BOLTS. There are a few others which I fear may require removing the toe rail, which I really don't want to do.
Will
"Jambalaya"
Boyd@wbta.cc