Milky oil/blow by...

Recently did a valve job on our 52 8-N.

Exhaust valves were burnt.
Put it back together, and got decent compression readings (110/115) started it up, ran fine.
Retorqued head after an hour of running, still ran fine (no visible leaks)

Parked it for a couple weeks.
Started it up today to use, still runs fine, BUT now it is blowing milky looking oil out the breather/oil fill tube.
Yes, the filter/screen is present.

The water/anti freeze in the radiator looks fresh and clean, no oil.

The exhaust looks normal, no clouds of white smoke, black smoke, or blue smoke.

Should have done rings while we were in there, but again, compression was decent...though the readings were done on a cold engine.

Going to dump the oil tonight to have a closer look, but would appreciate any thoughts.

Rob

During lunch, my son changed the oil.

He didn't check level fist.

The oil is milky white/VERY slightly green, very thin.

He ran it for a while, but it started blowing milky oil out again.

I checked the stick this time, looks normal, but has only run for 10-15 minutes.

The engine was NOT washed during or after teardown, we did get a little rain (tractor was outside) but I can't see anyplace it could get in?

Even IF moisture got in, why would it be blowing out, all I can think of is bad rings?

Rob

You are correct. My mistake..... ..darn fingers!

Next, head gasket. Gotta buy a new one and put it on. This time, paint both sides of the head gasket with "aluminized" paint (this is just what I call it)and slap er down and tighten her up in the proper order. This is a silver paint that actually contains aluminum. Shade tree racers use it all the time to seal head gaskets.

Ya developed a leak between the oil galleys and the antifreeze. Not sure if the head actually runns water on those or not. If not, I would bet more on the gasket.

I don't like to think of the head gasket installation as "sloppy", but as it appears to be leaking, guess I'll bow to that one...

It, and the block were very clean, and two coats of coppercoat were applied to the gasket (both sides).

I will take the head in to have it checked for flat and cracks.

Will let you know what we find.

Appreciate the help!

Rob

What then is causing it to blow/drip from the breather?

If water is getting mixed with the oil, it will be milky, but what is the source of the pressure pushing it out?

Thanks

Yer apparently milky-oil is usually natural combustion by-products that need HOT OIL to evaporate. And it takes about 1-hour to gitt the 6qts of oil hott-enuff to evaporate that stuff. And even though yer son changed the oil, unless it was HOT, it still left junk in the crankcase which is still making you notice something that is semi-normal because its not hidden under yer tractor hood like yer belchfire V-8 breather is.

H311 yer belchfire V-8 would probably show that same stuff except the environmental do-gooders forced what is now known as PCV (positive crankcase ventalation) on unwilling engine manufactures to suck that vent breather stuff back thru their carburators in the spirit of saving the world from Los Angeles SMOG.

And you're just noticing it now 'cuz you gotts bitt..... ....Dell

Thank you for the explanation.

Since I'm in need of (much) education, one more question please;

On a flathead, the valve chamber is below the head.

Oil is pumped into the chamber, lubricates the lower end of the valves, and then goes back down (at least in my model A).

Since there is no oil being pumped into the head, how does oil mix with the coolant due to a faulty head/ head gasket?
I gotta be missing somthing here?

The 8-N is pressurized, does it pump oil thru the head for cooling?)

Rob

Rob

Thanks.