More info In the "olden days" they wanted a bit of oil to get past the valve seals to lubricate the valve so it would not become stuck. Since it just a cast iron bore vs a bronze bore. A buddy rebuilt his with bronze bores and better seals and has very little smoke. The issue is when the motor is turned off a clyinder or 2 could be under a vacuum, which then sucks a few drops of oil past the seals and into the cylinder. When you start the motor, you have puff the magic dragon.
More info In the "olden days" they wanted a bit of oil to get past the valve seals to lubricate the valve so it would not become stuck. Since it just a cast iron bore vs a bronze bore. A buddy rebuilt his with bronze bores and better seals and has very little smoke. The issue is when the motor is turned off a clyinder or 2 could be under a vacuum, which then sucks a few drops of oil past the seals and into the cylinder. When you start the motor, you have puff the magic dragon.
ScoutD300 10 months ago
mine does the same thing
mujjuman 10 months ago
I sure the lack of "real" seals is the issue. The builder used stock parts, but they could have been 30 years old.
ScoutD300 1 year ago
did u find out what it was
lrwatkins 1 year ago
This is not a bad pcv this caused by worn valve guide seals.
ml5001 1 year ago
@ml5001
that is not necessarily correct. your valve guides could be just fine but the excessive crankcase pressure from a stuck pcv could be causing blowby
alextessmer89 1 year ago