350 # appears correct. I never had a problem with galling, but having worked with SS all my life, I know it is a real problem, one you don't want there for sure. So If you are worried, I would put some penetrating oil that is also lubricating on the bolts before removing. When they are out, clean them and use TefGel on the threads, and maybe only torque to 300#. If you have Carbon steel washers, replace them with big, heavy SS washers, or have some plates made. The 1 5/8" nuts sound like heavy duty nuts, nice. If the pitting is bad, you might want to replace, if not, dip them in acid to remove the corrosion. I also had long bolts, I sawed the socket in half, and welded a piece of tubing in to extend it.
Bill Coleman Entrada, Erie PA On Tue, Nov 1, 2022 at 3:51 PM James Hesketh via CnC-List < cnc-list@cnc-list.com> wrote: > My boat is a ’78 C&C 26. It’s a Florida boat and has spent all its life > year round in salt water. I’ve had her for a few years now and I found the > infamous “Smile” when I hauled out yesterday and have a few questions about > re-torquing the bolts. After sanding in prep for paint I can see previous > smiles have been repaired. > > > 1) From the Keel Bolt Specification chart in the C&C Photo Album it shows > the torque spec to be 350 Foot Pounds for the 1-inch bolts. Is Ft-Lbs > correct or could that be Newton Metres? > > > 2) I have three 1-inch bolts and one 1/2-inch bolt that is furthest aft. > The Spec Chart lists a 1 1/2-inch nut for the 1-inch bolts. Mine are 1 > 5/8-inch. Does that mean these might not be original, or could C&C have > sometimes used different size nuts? > > > 3) All three of the 1 5/8-inch nuts have various stages of pitting, I’m > assuming it's from electrolysis. The deepest pits appear to be about 1/8th > inch deep. I’ll remove one nut and take it with me when searching for > replacements to make sure I have the correct thread pattern. The question > is: do I worry about the bolts themselves, or leave them be following the > ignorance-is-bliss principle? > > > 4) I once had a SS nut on a SS all-thread keel bolt gall when I was > removing it — which caused all sorts of complications. I'm terrified of > that happening here. Any tricks or suggestions to lessen the chance of that > happening, especially since I suspect electrolysis issues? Also, I will > need to cut about a 1/2- inch off the tops of two of the 1-inch bolts to > get my deep socket onto the nuts (the bolts currently protrude 1 3/4-inch > above the nuts. Will the heat from cutting through them contribute to or > lessen the chances of galling? > > 5) When re-torquing should I use some sort of anti-seize or torque it dry? > > > Thanks in advance, > > Jim Hesketh > C&C 26 - Whisper > Miami, FL >
