Re: Help.. Broken Bottom engine casing.
Your repair looks good. It should hold but keep an eye on it too.
That is indeed a seal. It seperates the crankcase from the atmosphere. If it looks bad and you have a new one, now is the time to replace it. You can pry it out of the case easily with a small screwdriver or similar tool. Clean the bore where the seal rests. Installing the new one just takes a little patients, a socket just a little smaller than the outside diameter of the seal. Apply a little oil, your engine oil is okay to use, to the inner lip of the seal and the end of the crankshaft and carefully center the seal on the crank with the open side facing in. Push it in as far as you can with your fingers, keeping it centered in the bore then tap it all the way down with the socket and light taps with a hammer until it is flush with the case. I should have said earlier to use a deep well socket so you don't damage the end of the crankshaft. Good luck. You should be good to go.
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