>>2714491
I replaced my car's coolant thermostat the other day, once it's installed you turn a little plastic screw to bleed out air in the system. The thermostat is pretty far down in the engine bay so I used a long and somewhat sharp screw driver - gave the thing a bad turn and somehow punctured the plastic (and hollow) screw - causing coolant to trickle out. Luckily it was the same screw as the previous thermostat so it was quick to swap out, but it was a panicky three seconds before it occurred to me