The bearings in the water pump let go and took the seals out with them. Thats where your coolant came from.
The water pump on 3.7L/4.7L engines is bolted directly to the engine timing chain case cover.
- Disconnect the negative battery cable.
- Drain cooling system.
- Remove fan/viscous fan drive assembly from water pump . Do not attempt to remove fan/viscous fan drive assembly from vehicle at this time. 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. 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 and width.
- If the water pump is being replaced, do not unbolt the fan blade assembly from the thermal viscous fan drive.
- Remove the radiator fan.
- Remove accessory drive belt.
- Remove the lower radiator hose clamp and remove the lower hose at the water pump.
- Remove the water pump mounting bolts. CAUTION: Do not pry water pump at timing chain case/cover. The machined surfaces may be damaged resulting in leaks.
- Remove the water pump and gasket. Discard gasket.
The water pump on 3.7L/4.7L engine is bolted directly to the engine timing chain case cover.
- Clean the gasket mating surfaces.
- Using a new gasket, position water pump and install the mounting bolts. Tighten the water pump mounting bolts to 58 N·m (43 ft. lbs.).
- Spin the water pump to be sure that the pump impeller does not rub against the timing chain case/cover.
- Connect the radiator lower hose to the water pump.
- Relax the tension from the belt tensioner. Install the drive belt. CAUTION: When installing the serpentine accessory drive belt, the belt must be routed correctly. If not, the engine may overheat due to the water pump rotating in the wrong direction. Refer to (Belt Routing 3.7L) for the correct belt routing. Or, refer to the Belt Routing Label located in the engine compartment. The correct belt with correct length must be used.
- Install the radiator fan.
- Fill cooling system.
- Connect the negative battery cable.
- Start and warm the engine. Check for leaks.
A tip on bleeding air from the cooling system: Remove the bleeder plug from the neck where the upper hose attaches and remove the radiator cap. Use a trans funnel to fill the engine through the bleeder until you fill the radiator. Replace the bleeder and finish topping off the radiator. This method usually works, but the 3.7/4.7 engines are notorious for trapping air in them.