As i was headed to my in laws on Christmas day when all of a sudden I start hearing a loud knock like I had no oil . I pulled over and checked my dipstick and had oil on the stick .I got back in cranked it up and the knock was gone and oil pressure showed a little below half . I got about a mile from them and the knock started again and the oil pressure dropped. got to their house and the knock was gone again if i revved it up it would knock but then stop like it was being starved for oil . I am assuming that my oil pump is gone . I have recently done an oil change with a toyota oil filter and also put seafoam in with it not a week before ... what are the chanced something has clogged my pickup? i drained the oil back out and found no metal so i am hoping maybe an oil change will fix it but i know better ... has anyone else had this kind of issue and do i have to remove the steering bar to get my pan off?