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Paul4x4 wrote: It's valve stem seals that have gone bad if it puffs some blueish smoke on start up. Mine does that too, and I'm about to replace those seals when I find some time. My Jim has some 150k on the clock, which is quite a lot, so no wonder the valve stem seals are a little bit on the dead side! No other problems with the engine though, runs good, and doesn't burn oil when running.
not only could it be valve stem seals it could be the valve guides as if thay have movment in them it opens up the seal and lets oil past as it moves side to side im in the proses of carring out a rebuild on my single cam and it going from bad to worse
markyp2000 wrote: not only could it be valve stem seals it could be the valve guides as if thay have movment in them it opens up the seal and lets oil past as it moves side to side im in the proses of carring out a rebuild on my single cam and it going from bad to worse
That might be the case too that the guides and seals are all shot, but I don't think those guides would go bad very easily if the engine's been maintained properly, though...
BTW, how many miles there was on your engine before you started rebuilding it?
