Last week I did an oil & filter change on my girlfriend's '02 Wrangler. When I went to take the oil fill cap off, it just clicked and spun in my hand but would not loosen at all. I ended up filling the motor oil through the dip stick tube. The last time she got her oil changed, she had her mechanic do it and I don't know if he went a little overboard tightening the cap or if it just wore out from age. In any case, I'm looking for some suggestions to get the thing off. I assume there is some type of rachet in the cap that seems to have broken. I wondering if I can pop the top of the cap off and maybe get a wrench on the bottom section of the cap.
If anyone has a thorough knowlege of the inter-workings of the oil filler cap on any good ideas for removing a broken one, I'm all ears.