Home › Forum › Ask A Member › Leaking Crankshaft Seal. › Re: Leaking Crankshaft Seal.
April 10, 2018 at 10:26 pm
#73766
What you see in my video is the top of the pressed in lip seal so any blow-by past the bearing or thru the rollers would be trapped below it and exit thru the drain. The bubbles are caused by crankcase pressure getting past the worn lip.
https://www.youtube.com/watch?v=cXt6fV6Z5rc
On a twenty horse motor I’m currently working on, I poured some fuel mix over the top seal and it drained into the crankcase before I could turn the motor over. That’s why I like testing them this way, it’s quick and reliable.