The latest battle with the bloody KH! More rings, more hones, more pistons, more money, more oil.....I started it up and ran about tree miles, and when I got back it was smoking as much as it ever has since I have owned it. It usually does not smoke so much, so.....
I pulled the heads, and there is a ton of oil up top. When I lift the intake valve there is a bit of oil in there, but that is not where I think all this oil is coming from. I think it is going right past the rings as usual. I checked the breather timing by rolling the engine over and checking when the compression is relived through the breather tube. It is about 8 to 12 thirty-seconds after TDC of the front piston. Seems just where it is supposed to be. Of course the rear develops the pressure in the cases before this, but it has to get presume from somewhere to blow the oil out. Looks like I will pull the engine again and redo the pump seals, and check to see that the breather tower's bottom plate is the flattest one I have, that is in good shape.
Looks like all the work to make plates, changing the oil pump, sealing up the side oilers, and putting in Total Seal rings was not the answer. I just can't figure why this thing will not seal up. The best results I have ever had was with Total Seal rings with the Hastings three piece lower ring, and not the one piece HD style that is now in it, as Total Seal changed their supplier.
Do any of you use valve guide seals on your guides? I see that on the NOS parts page they list them for Pans and K models as the same part number, but I have never heard of using guide seals on a Flat Head.
Any advice is always welcome. This time I only had about three miles on it, but it was smoking far more than it was when I pulled it apart last time. The compression was very high though, and was hard to kick over, but when I pulled the heads and the rear was very wet, and the front was pretty wet. The rear it was a seriously puddling in the cylinder on top of the piston, and spread out all over the head. The front had less oil, but was still wet up top.
I am thinking now about moving the breather one tooth forward, and then running it until it has no compression, and then work on the whole thing again. Really tired of this circus.