All, a question for the porridge beards out there. Someone will know the answer. When you look at the Block, 1275 or 998 it doesn't seem to matter, the water pump is held on by 4 bolts, and two doules.
My question is right at the bottom of the block face where the pump mounts to the block there is another hole, which is not douled or takes a bolt. What the hell is it for ?