Thread: Question for our engine experts.

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Not being totally familiar with Ford, things you could check: some seals are directional-is it installed the right direction, is it leaking at the seal surface on crank or is it leaking between the seal and cap, how much difference should the seal and crank be in size-too much difference and the seal will not last. Just some food for thought.
Good luck Don.

I read one time that our hot rods are not leaking oil, they are marking their territory!

Thanks for all the suggestions, even yours, Steve. Yes, the block has been line bored and I took a magifying glass to look at the crank and seal once I had the flywheel off, and it is definitely leaking between the rubber seal and the journal of the crank where that seal rides. I wiped it and watched it seep again.

I took a good look at the back of the crank when I put the second seal in, cleaned it with a scotchbrite pad and then a clean rag. It looked fine to me. I don't own a good, accurate mike set, but I think I will buy one before this one goes back together. The seal that is in there now is a double seal, if I recall, and the new one coming is from FelPros Performance line.......it should be good, it was $ 45 for that one seal!!! I am also going to put a little silicone around the outside of the seal when I install it, just for giggles, but it seems dry there.

The line bore thing makes sense because I had to go to a shorter timing chain because the stock one was a little sloppy. And, the seepage is on the bottom of the journal, as if the crank were sitting a little high in the block. It only leaks a slight amount, but I sure would like to cure it while the engine is out again.

Thanks again for all the help guys, and yes Steve, I will buy lots of oil.

Don