Originally Posted by TWCarpentry
Thanks for all the helpful information. Has anyone heard or used Hard-Blok? It is an engine block filler for racing engines. Could I use this to close the hole?
HardBlock is used for completely filling the waterjackets to increase the strength of the bottom of the block. It is very cement like. It blocks off the cooling passages, which tends to render the block useless for street use(no cooling). It is not a patch of cracks or holes