Originally posted by sapote
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Thanks for your question and reply.
I have tried to death welding cast iron block cracks or build material
and I never ever ever had success in thin/slim areas like this one. Cast
iron does not like to be welded in small areas. An example the Old School
machine shop Hot/Rodders which closed few years back Harry(owner)
who retired they use to weld Cast Iron heads for Diesel trucks but they
would weld so much material like min 20-25mm+ and then he still never
gives you warranty that the moment the engine starts and goes thru heat
cycles will hold up.
Thin areas like this I have tried with pre-heating technic to nearly
red and used special welding rod from camshaft grinding company and
never worked well. The cracks come back right away when the welded area
is cooled down.
Also remember by applying that much heat to the block, the top will
warp so hard then I need to go next size pistons and no guarantee.....it
will work..
So the single choice to save this is what I am doing by cutting the block
and then will make up with the Cylinder head gasket and the engine will
never have any issues.
Regards,
Anri
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