Ok when changing the oil in a slant 6 and taking off the oil filter make sure not to hit the Distributor cap . When i did my 1st oil change on my old val i didnt even know it had moved could not tell it by looking lol . But it move just enough to stop the rotor bug from turning . and in turn took and knocked the teeth off the Distributor gear. Its plastic btw if you didnt know . I could not figer it out took me all day to get it. thanks for the help dad hahahah