Joined Oct 2003
955 Posts | 1K+
Sweden
Hi all!
This may come to you guys as yesterdays news, but feel free to ignore it in that case.
I had a 2001-2003, 650 crankcase that was leaking water into the oil. All sealing elements were in order and there were no signs of pores in the cast. After a lot of pressure testing I found it! The crank case halves were burred off too much where they are sealed together. Just around the area for the three o-rings on the sleeve, the sealing surfaces was almost tapered off on both case halves, making the o-rings job very difficult. I welded the cases in the specific region and grinded/polished them to sharp edges again. Voila! Tight up to 2 bars, without loads of liquid gasket. But you all knew that one, didn't you? :wink:
This may come to you guys as yesterdays news, but feel free to ignore it in that case.
I had a 2001-2003, 650 crankcase that was leaking water into the oil. All sealing elements were in order and there were no signs of pores in the cast. After a lot of pressure testing I found it! The crank case halves were burred off too much where they are sealed together. Just around the area for the three o-rings on the sleeve, the sealing surfaces was almost tapered off on both case halves, making the o-rings job very difficult. I welded the cases in the specific region and grinded/polished them to sharp edges again. Voila! Tight up to 2 bars, without loads of liquid gasket. But you all knew that one, didn't you? :wink: