Doing my first oil change on the used 2001 Catera I bought late 2004. Car now has 22000 miles. Went to unscrew the oil filter housing cap so I could change the cartridge, but it appears the whole housing unscrewed. I couldn't get the housing to release totally though. The threads appear to have disengaged from the crankcase, the housing rattles freely, but won't release... no way to replace the cartridge. I assume the cap screws into the housing, and the housing screws into the crankcase. Anyway, anybody got any tips on how to remove the cap without the entire housing spinning? Only thing I can think of is to use some type of strap wrench to hold the housing while I use the 24mm wrench to loosen the cap. Not much room to get up in there, plus I don't own a strap wrench. Maybe this is how Cadillac makes sure you give them the oil change business!!