> > I'm driving around on a block that had a hole in it. A roller dropped
>> down and got pushed through into the waterjacket by the camshaft.
>>
>> N Forbes wrote:
>> >
>> > Come on now Art, don't get carried away. That's nothing a little J-B
>Weld
>> > won't fix ;-)
>
>No problem with patching up a block if it is a fairly useless area. One of
>my employers who used to race drag cars tells stories of trying to find the
>blown out pieces of grenaded race engines, so the local welder guy could
>patch the block back up. Imagine scouring the 1/4 mile at 3 am with a
>flashlight looking for dime sized pieces of engine block. Supposedly the
>more pieces they had, the cheaper the repair was. They would always end up
>fixing the side of the block as the rods would grenade at high rpms and I
>believe the water jackets in those blocks were almost completely filled with
>hardening stuff to stiffen them, so I doubt that a normal engine would
>withstand such a problem and be salvageable, but if the break is not
>structural (IE thin area, non load bearing area) it can probably be repaired
>adequately, provided the block has not been extensively damaged.
The bottom water jackets of drag car engines are often filled with
concrete. Not just plain concrete, it has lots of iron in it to
better match the expansion properties of the block.
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