Do you think a sleeve will fix this?

[Mart]

I'm working on my newly acquired 59 Flatty. The bores are quite bad so I am going to sleeve all of them. I'm on the 4th bore and noticed a crack. It runs from the bottom of the cylinder up to about 1-1/2" from the top.

So if I carry on and fit the sleeve, do you think it will cause problems? I could foresee applying some sort of leak fix to the coolant. Anybody got experience of such a crack?

On the Crusty Flatty one cylinder did have a spot breakthrough into the water jacket and it doesn't seem to have caused a problem.

If I do proceed to fit a liner I would probably bore no more than .060 and would run the radiator either non pressurised or at most 4lbs.

What do you think? The crack looks worse because iron dust has stuck to it. In the second pic I have wiped it off at the bottom.

Mart.