I need to replace the valve core on an old school HR pressure relief valve in an i-beam floor. The core looks like this:
780RPA One-Way Pressure Relief Valve
The threaded boot it screws into is integrated into the raft floor. I've done this replacement once already on a different raft, and it was super easy: put a socket on the wrench flats, unscrew the core by hand, screw the new one in place. On the current raft, I'm up against two challenges: 1. The recessed hole in the floor is so close to the wrench flats that I have to use a needle nose pliers to get purchase instead of sticking a socket in there. 2. The valve either was over tightened by the previous owner or the threads are seized. I've put what seems like a lot of torque on the old core and am afraid I'll rip the boot/floor if I twist any harder. I squirted a bunch of 303 around the core and let it sit, hoping the liquid would act like a penetrating oil. No luck so far.
Anyone dealt with this issue before? Would be nice if I could just do the core swap, since I'm only 2 weeks away from departure for Deso and am nervous about doing a full cut-it-out-and-patch-in-a-new-valve repair so close to the trip.