Grant, syn oils are so slippery that it can work past areas that otherwise
would not occur with regular oils. Syn oils will leak out sooner than
regular oils too. Try a using all regular oil before you tear into it. It
might be just the oil. My truck sat for 5 years before I bought it. It
smokes like yours, too and out the tailpipe. The smoking seems to taper off
with use. I will give it a 1,000 miles or so before I tear into it. BTW, my
truck's 235 is a fresh rebuild, as well.
new mexico jim
50 ½ ton
51 two ton
Grant Galbraith wrote:
> I have about 13 K on my 235 that was rebuilt with all new parts, bored
> with new pistons, cast rings and bearings as well as cam, cam gears,
> etc... I've noticed since I took it out of storage after a highway run
> it will smoke from the breather tube and vents in the valve cover so
> much so that smoke is billowing out from under the truck. I've always
> used 5-30 Mobil 1 synthetic and changed it again, the 5th oil change
> after noticing the smoke, still smoking. I know bad rings can cause
> blow-by but wouldn't expect it on such a recent rebuild. Any Ideas?
>
> Thanks, Grant
> 50 Chevy 3100
> 52 GMC 150
>
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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