Removing the Oil Cooler Lines at the Oil Cooler sometimes results in damage to the Aluminum threaded Nipples on the Oil Cooler.
What happens is the Oil Cooler Nipple threads corrode to the Seel Oil Cooler line nut. When you turn the Nut the piece/s of thread stuck to the nut cut up the threads as you unscrew the nut.(This happend to me)
In our DIY Repair section there is some ways to avoid this probem; and if it does happen there is a repair for that.
Also Oil changes are covered there also.
DIY Repair Links
http://www.peachparts.com/shopforum/forumdisplay.php?f=82
http://www.peachparts.com/Wikka/DoItYourSelf