Digging up an old thread: I have read through all the coolant filter threads I can find, and I cannot find any tricks for getting the pipe plug's out of the manifold and water pump housings. Mine are stuck, like Stuck, or maybe STUCK is more accurate.
PB blaster has done nothing, and I have a broken wrench to attest to my vigor in attempting to remove them.
What are you folks using to get them out? An exhaustive search for 4-pt sockets has yielded exactly nothing
. I can go back to rotations of blaster + hammer + heat + wrench if there's nothing better out there, but that's not my first choice.....