yep tight bearings plus extra oil = hydrolocked oil pump and busted gear, shaft, etc (whatever the weak link is) a fix for this if it happens with a stock pump is a bronze distributor gear that way when something seizes it just eats the gear and doesn't break anything gears are like 30-40 bucks through jegs if you go that route inspect the gear regulary and replace it when it starts to show wear wich will be fairly often if your breaking pump shafts