QUOTE (Offshore_sailor @ Jan 19 2009, 02:56 PM)

I had the same thing happen in cold weather. The oil cooler o-ring costs under $5, my mechanic charged me $91 for parts + supplies + labor. There is a good picture
here of the oil cooler. It is smooth because it is water cooled (notice where the coolant hoses are attached). Now that I've Googled & read up on it, it sounds pretty simple to fix, but it still cold out there.
It is real simple to fix, the hollow tube that the filter screws onto (which lives in oil) is not hard to budge. Just be careful reinstalling, as it is a cast piece, not machined. Doesn't need to be torqued down real tight anyway, and the type of threads it has will give you a definite clue that you're done. ALSO, you don't need to disconnect those hoses, as there is more than enough flex to move the cooler away from the block, remove the old O ring, put the new one in place, and put the hollow tube back in. I went slow the first time, but having done it once, I can say with confidence that it would only add about 2 min. to an oil change - REALLY! It's that simple. Lastly, THANK YOU for pointing out that those hoses are for coolant, a fact which totally slipped by me. Even though the coolant is hot, it's still way below the temp of the oil, and now the whole design makes sense to me. Sorry to take so long replying, this was tagged as spam and almost lost