When I rebuilt my 1951 8N, I went to a single piece lip seal in the front, and it is sealing perfectly.
For the rear seal I just could not seem to get the standard rear rope seal to fit in the groove flat enough to avoid completely binding the crankshaft. I even tried two different brands with no success. Yes, I tried rolling it with a large socket and lots of pressure.
So, failing that I installed a graphite impregnated seal designed for a flathead V8. That seemed to work better, but now likely not enough contact force, because it leaks.
So, the MYSTERY is that it does not leak at all with the engine running at a fast idle even for 20 minutes or so, but as soon as I shut off the engine, it drips a puddle about 5 inches in diameter fairly quickly, then settles into about 1 drip every 30 minutes.
It is definitely engine oil not trans/hydraulic, as I added dye to the engine oil and it glows bright under UV.
I am going to live with it for now, but still very curious about why it does not drip while running. Any ideas and has anybody seen that before?
For the rear seal I just could not seem to get the standard rear rope seal to fit in the groove flat enough to avoid completely binding the crankshaft. I even tried two different brands with no success. Yes, I tried rolling it with a large socket and lots of pressure.
So, failing that I installed a graphite impregnated seal designed for a flathead V8. That seemed to work better, but now likely not enough contact force, because it leaks.
So, the MYSTERY is that it does not leak at all with the engine running at a fast idle even for 20 minutes or so, but as soon as I shut off the engine, it drips a puddle about 5 inches in diameter fairly quickly, then settles into about 1 drip every 30 minutes.
It is definitely engine oil not trans/hydraulic, as I added dye to the engine oil and it glows bright under UV.
I am going to live with it for now, but still very curious about why it does not drip while running. Any ideas and has anybody seen that before?