banlee Posted October 16, 2012 Report Share Posted October 16, 2012 i tore my engine apart today and i got a little confused. it doesn't have a seal in between the crank bearing and the case? how is that possible? Quote Link to comment Share on other sites More sharing options...
Finch Posted October 16, 2012 Report Share Posted October 16, 2012 theres not a rubber seal there Quote Link to comment Share on other sites More sharing options...
banlee Posted October 16, 2012 Author Report Share Posted October 16, 2012 theres not a rubber seal there then how does it keep the pressure different on each side? Quote Link to comment Share on other sites More sharing options...
old put-put Posted October 16, 2012 Report Share Posted October 16, 2012 then how does it keep the pressure different on each side? There is no seperation in pressure inside the crankcase, this is different than compresion. Compresion is only in the topend not the crankcase. Quote Link to comment Share on other sites More sharing options...
banlee Posted October 17, 2012 Author Report Share Posted October 17, 2012 There is no seperation in pressure inside the crankcase, this is different than compresion. Compresion is only in the topend not the crankcase. yes i understand that. i was just thinking there need to be pressure to force air into the cylinder. but the more i think about it the piston creates a vacuum effect to pull it in. i understand now. Quote Link to comment Share on other sites More sharing options...
THE358BANSH Posted October 17, 2012 Report Share Posted October 17, 2012 i tore my engine apart today and i got a little confused. it doesn't have a seal in between the crank bearing and the case? how is that possible? In between the center crank bearings there is a Labyrinth seal. Quote Link to comment Share on other sites More sharing options...
AKheathen Posted October 18, 2012 Report Share Posted October 18, 2012 There is no seperation in pressure inside the crankcase, this is different than compresion. Compresion is only in the topend not the crankcase. wrong.... because.....vvv In between the center crank bearings there is a Labyrinth seal. a labyrinth seal uses oil as the seal to separate right and left. it's sitting there in between the 2 bearings. there should be sealant, or an o-ring on it, to seal against the case, iirc.... Quote Link to comment Share on other sites More sharing options...
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