Looks like some repair was done on the rear cylinder some time ago but wasn't welded right since cleaning of the oil inside cylinder wasn't done properly, creating oil to mix with the weld, and there you go... what is the best way to repair this sort of thing, its not the bore so I'm good, but oil keeps leaking out as I ride... JB weld? Hot temp gasket seal? any good bond out there??? I'm trying not to get the cylinder out of the bike and just do a temp bondage repair for this season...
here are some pix
cylinder_crack1 by 78ducati, on Flickr
cylinder_crack2 by 78ducati, on Flickr
cylinder_crack3 by 78ducati, on Flickr
Darmah Rear cylinder barrel cracked at oil casting line...
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- Parallel Twin
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- Joined: Tue Oct 13, 2009 8:11 am
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- Parallel Twin
- Posts: 119
- Joined: Tue Oct 13, 2009 8:11 am
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- Parallel Twin
- Posts: 119
- Joined: Tue Oct 13, 2009 8:11 am
http://www.amazon.com/ALUMFAST-H-55-5-M ... rid_pt_0_0 Might work fine for years! Or,maybe not,what with expansion/contraction.
Isnt that just a poor casting? Shouldnt a blemish in that area be non oil filled and non compression affecting? The cast iron sleeve is pressed in there and a crack there should have no affect on anything....unless its exactly at the oil galley.
79 Darmah
78 900 GTS
86 F1B
80 SSD
02 Harley FXD
72 H2 750 triple
08 KTM 300XC
there has yet to be a motorcycle line made that is as satisfying to ride, hear and look at as the ducati bevels
78 900 GTS
86 F1B
80 SSD
02 Harley FXD
72 H2 750 triple
08 KTM 300XC
there has yet to be a motorcycle line made that is as satisfying to ride, hear and look at as the ducati bevels
I'm not sure about barrel temps on the outside of an oil gallery, but I've used Devcon to deal with crankcase porosity on a roundcase, and it has been absolutely brilliant with no issues for several years.
As with any other solution, you'll need to make sure you don't choke off the oil gallery by forcing it in too far. I'm not familiar with JB Weld other than seeing the name around a lot. If it has the same expansion coeffiecients as the the alloy and can handle the temperature, then it should be fine. If not, then it will part company with the parent metal at some stage.I'm not sure adding shavings of ali helps your objective. I think it's likely you've introduced too different and coarse expansion coefficients into the equation.
This Devcon stuff is the business. If the temp is under 250F, I'd use it for sure for your application. The added benefit is that if you finish it off well (with water), it will be close to invisible.
http://www.devcon.com/prodfiles/pdfs/fam_tds_107.pdf
Kev
As with any other solution, you'll need to make sure you don't choke off the oil gallery by forcing it in too far. I'm not familiar with JB Weld other than seeing the name around a lot. If it has the same expansion coeffiecients as the the alloy and can handle the temperature, then it should be fine. If not, then it will part company with the parent metal at some stage.I'm not sure adding shavings of ali helps your objective. I think it's likely you've introduced too different and coarse expansion coefficients into the equation.
This Devcon stuff is the business. If the temp is under 250F, I'd use it for sure for your application. The added benefit is that if you finish it off well (with water), it will be close to invisible.
http://www.devcon.com/prodfiles/pdfs/fam_tds_107.pdf
Kev
Thank you all, all those epoxies sound amazing, I guess new technology has brought adhesive to a new level....
I would The Devcon aluminum putty for cosmetic repair like bad welding etc.
and the Manley 40180 miracle seal for welding like repair, you think I can reattach broken cylinder fins with it???
I would The Devcon aluminum putty for cosmetic repair like bad welding etc.
and the Manley 40180 miracle seal for welding like repair, you think I can reattach broken cylinder fins with it???