The Stovebolt Site Forums The Shop Area Engine Shop puddle of oil on intake valve? How?

Gave up on 1966 250. Now just curious. Engine smoked bad. New head. Let it idle for an hour. Kept right on smoking till I saw oil dripping out of exhaust pipe. Gave up took off intake exhaust manifold. Lots of oil in both the manifold and head ports. Number two intake had an actual puddle of oil completely surrounding the valve.

Can that much oil come down the guide????

PS. The motor smoked before I had the head rebuilt. When I took the head off to get rebuilt I noticed oil in the intake and exhaust. In other words it is doing the same before and after the rebuilt head. So I am guessing the rings are bad even though I had 140 plus compression.

Is it possible to get oil in the intake from bad rings?????

Thanks for any input. I will update the condition of the rings when I pull the pistons.

The blow by is causing oil vapor to cover everything inside the head and manifolds. When it's shut off, it condenses back into liquid oil that you see inside your engine.

Oil rings have little effect on compression. If they're stuck in carbon build up, it will burn a ton of oil and still run OK. Severe oil consumption can increase compression readings by sealing the piston to the cylinder (the wet test).
Scott

Does this engine have a PCV system hooked up right? You might be missing a baffle and having oil get sucked right back into the intake. Usually oil getting past the rings burns completely. You are lucky you aren't fouling your plugs. Bad valve guide seals usually smoke on long down hills and at idle. Bad rings usually smoke under hard acceleration.