How Fix Crack in the Engine block
How Fix Crack in the Engine block
Has anyone experience fixing something like this?
I did google a bit. jb weld seems to be a dreamstuff???
I did google a bit. jb weld seems to be a dreamstuff???
Paso 750/ 1987
Paso 906/ 1992
Paso 906/ 1992
- higgy
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Re: How Fix Crack in teh Engine block
forget JB find a talented welder or get a new head
there are compounds to fix but JB is not one of them, Alumiweld in a pinch as long as it is not a stressed component
there are compounds to fix but JB is not one of them, Alumiweld in a pinch as long as it is not a stressed component
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
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There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie
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Re: How Fix Crack in teh Engine block
?or get a new head
At some point a chain must have snapped.
Re: How Fix Crack in the Engine block
No idea how this happened... I guess there was an inpact from the chain....
Question is how to fix....
Question is how to fix....
Paso 750/ 1987
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Paso 906/ 1992
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Re: How Fix Crack in the Engine block
What normally happens when the chain either derails or breaks is that it rolls up on the front sprocket until the diameter is such that it pushes the crankcase out of the way ...... and yours is mild compared to some of the damage I have seen
I wish I was young again............Id be heaps smarter than last time
Re: How Fix Crack in the Engine block
A good engineering/welding shop will be able to repair that crack unfortunately it means that the motor will need to come out and stripped down to do it properly. Been there done that.
- MarkST
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Re: How Fix Crack in the Engine block
I didn't know that, and it's an interesting theory, but it suggests to me that those metal case savers are totally useless unless they can just stop the motor from turning over when the diameter becomes such that . . .Mc tool wrote:What normally happens when the chain either derails or breaks is that it rolls up on the front sprocket until the diameter is such that it pushes the crankcase out of the way ....
I've only ever had one chain let go on me, and luckily that just split and came off the sprockets and fell down onto the road.
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Re: How Fix Crack in the Engine block
is it possible the caser saver (which does not fit on 750 engines btw) withstands the forces and stalls the engine instead (shredding the gearbox). Also it usually is quite close to the chain so maybe it prevents the chain to roll up between engine case and sprocket.
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Re: How Fix Crack in the Engine block
I think the real truth is that if your diligent enough to fit a case saver your probly diligent enough not to let your chain/adjustment get so bad that it could fail .Please don't refer me back to the sprocket bolt thread where I admitted to "chucking a chain thru the cases " ...........that must have been someone elses fault . Its ( the case saver ) like carrying a puncture repair kit.........your guaranteed not to need it as long as its on board .... soon as you leave it at home you get a puncture
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Re: How Fix Crack in the Engine block
Me too, but nevertheless I have them installed on my 907 and my MTS. You can't be too careful.MarkST wrote:I didn't know that, and it's an interesting theory, but it suggests to me that those metal case savers are totally useless unless they can just stop the motor from turning over when the diameter becomes such that . . .Mc tool wrote:What normally happens when the chain either derails or breaks is that it rolls up on the front sprocket until the diameter is such that it pushes the crankcase out of the way ....
I've only ever had one chain let go on me, and luckily that just split and came off the sprockets and fell down onto the road.
The saver doesn't have to resist the force of the chain bunching up. It works by preventing it from lifting off the sprocket in the first place, so the chain should just feed through and exit out the bottom (hopefully).
There is a lot of truth in what Hamish says; in that the sort of people who fit them are usually maintenance enough savvy that they never need them anyway.Mc tool wrote:I think the real truth is that if your diligent enough to fit a case saver your probly diligent enough not to let your chain/adjustment get so bad that it could fail .Please don't refer me back to the sprocket bolt thread where I admitted to "chucking a chain thru the cases " ...........that must have been someone elses fault . Its ( the case saver ) like carrying a puncture repair kit.........your guaranteed not to need it as long as its on board .... soon as you leave it at home you get a puncture
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2015 Scrambler Classic
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Scotland
Re: How Fix Crack in the Engine block
Some alloys are porous and take up oil over time. These cant be welded successfully. Found this out when I went to have a crankcase on my motocrosser welded.
Metal stitching is the best type of repair for this situation as it is done cold and so there is no shrinkage or contamination issues, but it is a specialist job which probably means it is very expensive.
Probably better to get some crank cases. Will probably end up costing the same as having your cracked one welded but the integrity will no longer be suspect.
Metal stitching is the best type of repair for this situation as it is done cold and so there is no shrinkage or contamination issues, but it is a specialist job which probably means it is very expensive.
Probably better to get some crank cases. Will probably end up costing the same as having your cracked one welded but the integrity will no longer be suspect.
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