Crankcase leak problem
I am working on a motorcycle engine - but I suspect this problem has been seen by members of this forum. I hope you can help.
This is a 4 stroke Yamaha motor 1980 xt250. This motorÃ¢ÂÂs crankcase is split vertically during its manufacturing (nicely done / assembly) Ã¢ÂÂ¦ My problem is that this motor is leaking oil, the crankcase oil weeps from the case (due to an accident many years ago). The weeping oil is coming from the split case (and broken gasket?), thank god the case isnÃ¢ÂÂt crackedÃ¢ÂÂ¦ Re-torque-ing the case has not helped with the weeping issue (perhaps a little).
I know deep down in my heart a new gasket should be installed. My friend sized it up very well Ã¢ÂÂAwww Mann Ã¢ÂÂ¦ your gonna be one day in - and one day outÃ¢ÂÂ HeÃ¢ÂÂs right... its gonna take a while for it to happenÃ¢ÂÂ¦ and I really donÃ¢ÂÂt want to (or have that time). Where not talking about an old (and simple) Briggs, these cases have a lot of stuff in them (tranny, oil pump, clutch, O.H.Cam, etc).
If I can fix it externally without pulling that motor and cracking those cases open. I might try it. Please forgive me Ã¢ÂÂ¦
I am thinking :
- Silicone sealant: quick/easy to work with, easy to remove from engine - maybe , donÃ¢ÂÂt have any experience trying to seal a motor. I donÃ¢ÂÂt think its going to work ... How about you guys ?
- JB Weld: I think this would make the problem go away. Very difficult to remove, donÃ¢ÂÂt need to use a lot of surface 2in x ÃÂ¾ in. DonÃ¢ÂÂt want to glue the cases shut in that 2 inch long strip.
- Gasket set: No brainer - this is the way to do it rightÃ¢ÂÂ¦ I DonÃ¢ÂÂt want to open that motor Ã¢ÂÂ¦
I think my next move is to try a silicon sealer externally Ã¢ÂÂ¦ but want to hear your thoughts before I go out and buy anything.