Well, it looks like the cold weather has caused my oil cooler gasket to crack and leak. 

Anybody have directions on how to go about changing it out?

Specifically can I leave the coolant lines attached?
Do I have to pull the syncro skid plate? I'd rather leave it on if possible. 

PS. I may be pulling the muffler and cat off to change out the cat for upcoming smog. If that helps. 

Doug