I believe the valve seals are leaking on my LDT465. I have noticed more blue smoke than usual and oil began to leak from the turbo housing. I removed the turbo and saw there was oil all up in the manifold. My thought is leaky valve seals due to me not running it on a weekly basis, atleast, causing them to dry out. My ? is can the seals be replaced without removing the heads or is there some way to hold the valves up through the injector ports? Also, kind of a stupid ? but if the turbos on these trucks don't add much power, could I swap my turbo for whichever turbo it is that whistles. I know that seems silly, but if they are all about the same, I would rather hear the turbo whistle.