ok running out of ideas. 94 b18c turbo civic fully built. gets hot after driving for an extened period of time or running it hard in boost. once i get stopped sitting at a light when no air is being pushed thru the radiator it gets hot. bled the system numerous times. no apparent leak or loss of fluid. fan is coming on. when it got hot the last time, i held the idle at around 1500rpms and gauge dropped back down to normal temp. is my water pump going bad? water pump only 2 years old had new one installed with the build. anyone hear of water pumps going bad with a turbo build?