well, as best as i know, the dealer said that the previous owner SAID he did the timing belt at about 190,000 to 200,000 miles, and i got the truck at 235,000, and i have 261,000 miles on the truck now. so the tensioners and bearings might be good. idk. i have to pull it all apart to find out. anyways, ya, i know about the pigtail on the knock sensor. the phrase, "been there, done that" comes to mind. i had to pull the manifold last year to replace the pressure dampener, and luckily, the same friend caught that before i screwed with it (guess he is good for something <img src="/forums/images/graemlins/lol.gif" alt="" />). i dont think i will be pulling the crank pulley, but if i do, thanks for the info. <img src="/forums/images/graemlins/kewl.gif" alt="" /> <img src="/forums/images/graemlins/cheers.gif" alt="" /> <img src="/forums/images/graemlins/patriot.gif" alt="" />