SOHC.co.uk Forums > CB350/400

Hairline crack in engine lower casing at front left engine mount

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PatM:
With my hands up (again) I did this to a 400/4 in the mid-80's and due to the amount of engines in breakers- resolved it with a new bottom-end complete. Id actually though Id put a wrong bolt- ie not from the original engine, rather than a mistake- but No, id clearly put the long bolt in the lower LHS and on strating the engine after a rebuild- suddenly there was a huge leak and a noise- then the engine cut..I did mention it once long ago on this Forum- as Ive had my present 400/4 for over 10 years now. Time flys...

Erwin83:
Just for the sake of archive:

I tried 2 different types of Alu Epoxy:
- Quiksteel Alu (a 2K sausage which is a thicker material)
- 2K alu glue (a more liquid epoxy, which worked like a charm on a casting gall in the cooling system on another bike)

Both ended up not working.
My conclusion is that these repairs are great to get you home, but will not last long.

I have the cases split now and found a welder specialized in welding cast aluminium.

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