It seems that there was a post on this web site a couple of weeks ago concerning a secondary bilge on the O'day 28. There was some information about a "weep" hole which was between the bilge under the salon and the bilge under the engine area (I have the OMC saildrive engine, sadly). I probably need to get some antifreeze into this area before winter lay up here in Michigan. My question is: How do I get antifreeze into this bilge? And if I fail to get some into it can it damage the boat when the water which I'm sure is in it freezes?