The Stovebolt Site Forums The Shop Area Engine Shop Some 50 years ago

Well that was simple! And to answer your question,
beats me, I didn't know what i was reading, and dunno what overlap would have to do with oil smoke. Both cams are quite tame, and smooth idling.

It cannot be a function of the piston rings. The only other way excessive oil could be entering combustion chambers is by way of flooded valve guides. Both seem impossible to be changed by merely switching cams and their attendant lifters/pushrods.

Keyword may be "flooded"- what could cause excess oil to appear at head when the only apparant difference was solids and hydraulic lifters. If I remember right, the oil to the head comes thru a passage in the head from the lifter gallery and then thru the rocker arm shaft on these engines. What and how would the different lifters change things that were happening in the lifter's oil gallery?

I cant remember back that far if the lifters had any "grooves" or different external drillings--but once the hydros "fill up" they should not have any different oiling requirements than the solids.

And as stated when everything went back to normal when all pieces were returned to their proper homes.

I saw my buddy 10 years ago at out high school's 40th reunion and we still couldn't figure it out--my opening statement to him was "Harvey, are you still messing with six cylinders?" He said "Yeah!" So I said "yeah, what 'cha got now?", He said "...a Porsche!". ahem