Today, I buttoned up the bike, and it warmed up, it was leaking around the bottom of the water pump cover. So, I replaced the o-ring with a new one, and snugged it down. I warmed it up, and it leaked again, but less this time. I snugged it down some more. The bolt on the bottom never felt like it was getting 'tight'. And then "tink", it snapped. So, aside from trying to extract the bolt, I need to head to the Fastener Guy, and replace all the bolts. I'll have the originals with me, but I don't know what material to request. I have heard that stainless breaks easier. Any experts able throw in some advice on material and/or grade? While we are at it, what's the best way to remove a bolt that snapped off inside the case?