Can you get a picture? If you damage it then you can just drill it out. Brass is pretty soft. If you damage the block then you can over drill and re-tap with the appropriate MIP thread tap.
I had a fuel banjo bolt with a built in bleed screw. The screw would strip out quite easily and as a result vibration would loosen the screw, air would enter, and the engine would die. Before replacing the bolt I used JB Weld epoxy stick (which is steel impregnated epoxy putty) to glue the bleed screw in place. It worked quite well, so well in fact that when the first replacement lost its bleed screw I immediately reinstalled the JB welded one. It remained in service for another few years until I replaced it with a banjo bolt that didn't have a bleed screw at all. The point being, if you are really scared of breaking the fitting in a manner that would render the boat in operable, then just try some epoxy putty. Clean it well and wash with acetone or denatured alcohol. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Thu, Apr 11, 2019, 8:23 AM David Knecht via CnC-List < cnc-list@cnc-list.com> wrote: > To follow up, I found what I am pretty sure is the drain plug near the oil > dip stick and near enough to the front of the engine to be visible. It > appears to be soft brass because it the head was already damaged by someone > trying to remove it before I tried to get a wrench on it. I was unable to > budge it even after leaving PB Blaster on it for a few days. I am afraid > to do much more because I am not sure I can find a replacement if I damage > it more. The only other thing I can think of to do is to remove one of the > hoses from the heat exchanger and turn the engine on long enough to pump > the antifreeze out. The alternative is to just start filling the overflow > with new antifreeze and have it slowly exchange over time. Any > suggestions? Dave > > On Mar 31, 2019, at 2:08 PM, David Knecht via CnC-List < > cnc-list@cnc-list.com> wrote: > > I need to drain the coolant from my Universal M4-30. The drain plug in > the photo I have from the manual is near the dip stick on the side of the > engine I can reach but can’t see. The photo in the manual is pretty > useless as I can’t see what it is pointing to. Does anyone know more > precisely what it looks like (size?) or a way to find it by feel (or > another way to drain)? Thanks- Dave > > S/V Aries > 1990 C&C 34+ > New London, CT > > <pastedGraphic.tiff> > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > > S/V Aries > 1990 C&C 34+ > New London, CT > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
