So, this weekend i decided to try and finally change my fuel filter on my 92 LX; but i encountered a problem: the Bolts wont come off the filter. They feel as if they are rusted onto the piping. I've drenched the bolts with wd-40, sit for a day, come back and retry with no luck. this has been done for the past 3 days straight with no luck. Are there any ways of getting this off?