I replaced the water pump seal on my KLR and put everything back together last night. Today, I rolled it out and fired it up. The thing started to overheat, spit antifreeze out the back hose and cooling fan didn't come on. I haven't put many mile on the bike but when I did ride it last, the temp needle went past mid point but not much and the cooling fan did turn on. Any thoughts? Did I possibly bind something up with impeller? I was careful to install all the washers as they came off and torqued everything to spec.