A Chrysler Hemi is an eight-cylinder engine named for its hemispherical combustion chamber. Chrysler has made three generations of this engine type, with the third generation entering production in 2003. A Hemi 5.7 engine typically appears in large Dodge vehicles and is a common option in Dodge RAM 2500 and 3500 pickup trucks. The water pump in these vehicles is on the front of the engine and you must remove several components to access it.
Disconnect the cable on the battery's negative terminal with a socket wrench. Place a drain pan under the radiator drain and remove the drain plug. Drain the coolant into the drain pan and replace the drain plug.
Place a square drive ratchet into the hole on the belt tensioner arm and rotate the tensioner clockwise to release the belt tension. Remove the drive belt and release the tensioner.
Disconnect the shroud for the cooling fan and remove the cooling fan with a socket wrench. Detach the coolant-recovery bottle and the windshield washer bottle. Remove the compressor for the air conditioner and brace for the alternator.
Remove the idler pulleys and belt tensioner with a socket wrench. Detach the hoses on the radiator and heater.
Disconnect the mounting bolts for the water pump and remove the water pump from the engine. Install the new water pump and torque the mounting bolts to 18 foot lbs. with a torque wrench.
Perform steps 2 through 4 in reverse sequence to complete the water pump installation. Connect the cable for the negative battery terminal with a socket wrench and refill the radiator with coolant. Start the engine and check for coolant leaks.
