Crank seal depth

[kingkamehameha]

I just put my motor back together and i noticed the depth of the stator side seal
On a spare block. I made my seal almost flush and i was wondering if i should take my flywheel back off and set it deeper. Will it leak or lose big time case pressure if i leave it?

[bonesv]

Service manual says to set the depth of the seal at 5mm on right (flywheel) crankcase half, 1mm on left crankcase half on the '94-'01 SA50's. Why the different depth settings? Might have to do with the tapered end of the crankshaft? Maybe some others will give better info on this subject being yours is not a stock motor. Good luck with the project. Hope this helps but you can see for yourself here: http://www.hondaspree.net/other/SA50_88-02_service.pdf

[bakaracer]

Keep in mind that that's for oem honda parts. 1-2mm below the lip is good.

[evilone]

I ran mine flush once and it was fine.

[larryhobman]

I have learned why it should be set almost flush on the pulley side. I had set the seal too deep and the oil pump gear chewed up the seal. On the flywheel side there is a stop point and you can set it all the way in to that.

[LMH]

Always do physical and sound checks followed by pressure and vacuum tests. If you heads some odd rubbing or scrapping do not proceed. You'll never have a fear of it leaking if you do the tests that take minutes.