ive been running biodiesel in my truck for over 1500 miles now and i need to urgently change my fuel filter . but i tried today and the suckker wont budge the cap wont even turn at all. i even welded a tool out of steel and the dam plastic cap bent my tool not the welds but the acctual 1/4 inch steel???!!!! the dealerships want to charge me 35-65$ if i suppily the parts depending on how hard it will be to take it off and by the looks of it its going to be a pain in the rear!!! any suggestions??? its a 96 powerstroke f 250 turbo diesel???