nothing worse than mixing medals!
anyway if you don't want to mess with the plug i would just find a hill
point the nose downward do what your going to do.
point it up hill check your owners manual on capacities and use the MB
coolant not going over the % of mix required. my guess is a bit to much
is better than not enough.
make sure you burp the system with the heater on & are getting heat.
i have bronze pool pumps out there and after 2 years of salt air and
pool water leaking past the seals they never come apart even with the
the case, minus a few cans!