Water Cooler is a Vehicle Perk in Call of Duty: World at War that decreases turret overheat by 30%. This perk is usually deemed useless to the MG gunner as the fire button can simply be rapidly tapped to decrease turret overheat.
Water Cooler allows the player to fire the machine gun turret above the tank for a much longer time, giving the turret considerably more firepower. Manning the MG turret can be risky, as the player is prone to getting shot. The MG gunner can prevent this by pressing the crouch button, which causes them to duck inside the tank, but causes the player to lose the ability to see, fire, or rotate the turret. Those who play Team Deathmatch will find it in their best interest to have at least one player with this perk as it only takes one good kill streak to turn the tide of battle. When used early in levels, a quick 3 or 5 kill streak can help a team get off to a quick start.
- The Coaxial Machine Gun serves the same purpose as the MG turret but is driver controlled, only fires forward, and has difficulty shooting over small hills or debris. The Coaxial Machine Gun tends to overheat faster than the MG turret as well.
- Players who man the MG turret with this perk will become much more effective if prolonged shooting is required, which would usually apply to tank battles or providing suppressive fire against enemy infantry.
- An easier way to greatly reduce the time it takes to overheat the MG turret is to fire in short bursts, rather than holding it in.