Okay here is the deal short and sweet, please help me out. the engine knocks. lol. when at idle, it doesnt knock ... when i give it gas and when driving, it does knock. its not too loud but its deff noticable. thought it could be a rob bearing that spun so i am going to change them this weekend. i am also going to change the knock sensor, why, i dont know, the guy down the road just told me to! also, he also said that with the 420a, i could drop the pan and put in new pistons/rods just by sliding them out of the bottom, is that true? answers to all above questions would be GREATLY appreciated! thanks in advance!