Water Pump: Service and Repair

WATER PUMP

REMOVAL
3.7L





The water pump on 3.7L engines is bolted directly to the engine timing chain case cover.
1. Disconnect negative battery cable from battery.
2. Drain cooling system.

WARNING: Constant tension hose clamps are used on most cooling system hoses. When removing or installing, use only tools designed for servicing this type of clamp. Snap-on clamp tool (number hpc-20) may be used for larger clamps. Always wear safety glasses when servicing constant tension clamps.

CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.

3. Remove two fan shroud-to-radiator screws, Disconnect the coolant overflow hose.
4. Remove accessory drive belt.
5. Remove lower radiator hose clamp and remove lower hose at water pump.
6. Remove seven water pump mounting bolts and one stud bolt.

CAUTION: Do not pry water pump at timing chain case/cover. The machined surfaces may be damaged resulting in leaks.

7. Remove water pump and gasket. Discard gasket.

CLEANING
Clean the gasket mating surface. Use caution not to damage the gasket sealing surface.

INSPECTION
Inspect the water pump assembly for cracks in the housing, Water leaks from shaft seal, Loose or rough turning bearing or Impeller rubbing either the pump body or timing chain case/cover.

INSTALLATION





The water pump on 3.7L engines is bolted directly to the engine timing chain case cover.
1. Clean gasket mating surfaces.
2. Using a new gasket, position water pump and install mounting bolts. Tighten water pump mounting bolts to 54 Nm (40 ft. lbs.) torque.
3. Spin water pump to be sure that pump impeller does not rub against timing chain case/cover.





4. Connect radiator lower hose to water pump.
5. Relax tension from belt tensioner. Install drive belt.

CAUTION: When installing the serpentine accessory drive belt, belt must be routed correctly (1-8). If not, engine may overheat due to water pump rotating in wrong direction. If necessary, refer to the Belt Routing Label located in the engine compartment. The correct belt with correct length must be used.

6. Be sure the upper and lower portions of the fan shroud are firmly connected. All air must flow through the radiator.
7. Install two fan shroud-to-radiator screws.
8. Be sure of at least 25 mm (1.0 inches) between tips of fan blades and fan shroud.
9. Fill cooling system.
10. Connect negative battery cable.
11. Start and warm the engine. Check for leaks.