Thanks, Brian,

but I do not have good blowtorch access to the GP area where I would need to heat with the blowtorch unless I remove the oil filter housing. If I do that, then I could probably use a socket, which may still work, depending on how badly I stripped the thing. Issue is - how hard is it to remove the oil filter housing?

I also considered trying to cut off the threaded end of the old GP (the piece that is sticking out). That would allow my 3/8 inch 12 mm socket to fit on the end, which it cannot do now and I do not have enough space for my 1/2" socket.

Because of my WVO system I also have coolant tubes running past this area, making access even harder. I separated one at the junction and caught the fluid, but this job became more work than I had thought as a result of difficult access....

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dannyf
1984 Mercedes 300 SD 214 K miles. Runs on WVO ~ 22 mpg over 8 K on WVO
1997 VW Passat TDI 156 K miles. Uses biodiesel and diesel. ~ 41 mpg
1996 Mercury Villager gasser. ~ 20 mpg