The bolt has a larger diameter section of shank below the pan of the head to prevent overtightening from breaking the plastic. I left it alone and now if I need to remove the pan I just have 3/8" fuel line and a hose clamp to loosen from the barb. I would only need to slot the bolt to replace the Oring and its at the very top of the pan so its just splash oil, not immersion. I didn't actually use the extra O-rings that came with the kit. The base of the barb had little chip off it already and did seem pretty fragile. I don't think it would survive an extended effort to extract that bolt.
That topic inspires me to enthusiastically rant about the joys of Neversieze. I use copious neversieze on all hose barbs with any flexible line or hose. I use it with water, coolant, fuel or oil. I've found stiff old dryrot lines years after installing them and they still release and twist off without having to cut them off or without breaking the barb. It really extends the service life of the stuff I put together. For instance I hate having to replace okay radiator hoses because they are corroded fast to the water pump outlet or radiator. I especially hate replacing a whole caliper because the bleed screw broke. Neversieze is beautiful stuff.
I used to hesitate on using Neversieze on electrical connections. I used to use the No-ox marketed for electrical panels. Thats basically bulk packaging of the same stuff that auto parts places sell in tiny little packages for battery connections. I've since learned that Neversieze was thoroughly tested for power company use and behaves well. Its also been tested as an alternative for heat sink paste. It actually outperforms the common heat sink goop sold for PC motherboards. The cheap HEI ignition modules with notorious short life last forever if they are globbed in Neversieze before install. I've also been thoroughly testing the limits of high amperage applications. I've used disgusting amounts of it on starter connections, battery terminals, start solenoid connections, sensor plugs, and home electrical applications. If you spread stranded electrical wire fibers apart and goop a whole bunch of Neversieze into it then apply a wire nut that connection will be rust free and perfectly conductive a decade later even in high moisture exterior uses. If you slather it on the inside of aluminum rims they never decay against the steel rotors. If you goop up your welder connections or jumper cable crimps during assembly they wont be green and decayed ever again. The horrible chalk that builds up around battery posts hasn't ever been there since I started slathering them up. Neversieze doesn't conduct micro amperage present in corrosion but it doesn't restrict operational amperage at all, even tiny amperages like hall sensors. It does "dry up" and get thick but a shot of PB Blaster and its instantly renewed to like-new viscosity. I cut the containers in half and use a paint brush to slather it everywhere.
