Keel bolt torque

Aug 14, 2011
182
Hunter 35.5 Legend PCYC Shediac, NB
I have a 1986 Pearson 282 with a lead keel that I just purchased. The keel bolts are in excellent shape and have been torqued to 70 lbs as per spec. It had a small smile that is approx 4" that has been filled and appears ok.
I am lifting in tomorrow and wondering if the smile reappears how much more torque could safely be put on these bolts
The bolts are 5/8" dia with a nut size of 1-3/16"


Thanks
 

NYSail

.
Jan 6, 2006
3,178
Beneteau 423 Mt. Sinai, NY
A 4" drop in the keel to me is a big deal. If I were you.... I would clean out the joint completely of all previous fillers as best as possible then fill the joint with 5200 prior to re-torquing and try and bring the joint together as best as possible.
 
Sep 8, 2014
2,551
Catalina 22 Swing Keel San Diego
Keep in mind when applying torque, especially to stainless fasteners, you should be using lubrication! That does not mean oil of any kind, you should use whatever flavor of Loc-tite is appropriate for your application. You would be amazed at how much the threads of stainless heat up when turning down, which is why you should always torque is steps, moving from bolt to bolt in an equalized pattern. Loc-tiite blue (medium strength) is fine for most applications and is 'mostly' waterproof when cured as far as I know. There are other Loc-tite formulas specifically for salt water prone areas and stainless bolts, but buying $70 per oz liquid isn't always critical. The blue medium strength formula provides good lubrication while turning down to spec and great thread-locking performance.
The engineers handbook is a great reference for most fasteners, but be aware there are so many 'flavors' of bolts out there. On critical applications I use a very high grade stainless 12 point bolt that has 180,000 to 190,000 psi tensile strength depending on size. The manufacturer torque values for those are almost double what the Engineer's Handbook values are for the same size fastener. I always consider the handbook values to be 'low end minimum'.