Rust + vibrations = fracture

Only a frew droplets of coolant on the garage floor and a loose waterpump mounting bolt... but when I wanted to tighten it, it showed that the bolt had broken. Since it is the same bolt used to tense the belt, vibrations may have killed it together with some rust inside the block. I had to use an 'easyout', a conical left drill bit, to get the remainings of the bolt out of the block. An M8 Helicoil repair kit did the rest. Always thrilling to bore into the block. Remount with new gasket and stainless bolt.
Cheers.