(01-20-2018 )JMBT Wrote:  JHNDZ, my truck has 648k. I am doing the valve guide seals because they have been leaking awhile and finally got so bad they started to push oil out of the exhaust manifold. I would not bother yours if they aren’t leaking regardless of miles. I don’t know what this would cost at a shop as I am doing it myself all at my brother’s.

(01-21-2018 )JMBT Wrote:  The valve guide seal job is finally done!! I found exhaust valve seals on 2,3,4,5,6 that we’re bad. I ran the overhead this morning. Then cycled the priming pump 8 times, cranked for about 10sec. Shut it off, ran the pump once more and cranked about 5 sec and she fired up!! Smoked like a son of a bitch for a few minutes of idling then quit smoking. After idling up to operating temp, I did a leak down test and only lost about 200-250psi in 60 sec, before the job I was loosing about 1400psi in 60 sec. I am attributing this to replacing the fuel relief valve which I also did while I had the fuel system apart. I also did a cutout test and she performed beautifully. Tomorrow I put the wheels back on and take a road test.