Fix It

Explore » home» 150 » 1990 » a » f » ford » how » lariat » on » pump » replace » the » to » water » How to Replace the Water Pump on a 1990 Ford F 150 Lariat

---

How to Replace the Water Pump on a 1990 Ford F 150 Lariat

The water pump in a 1990 Ford F-150 Lariat keeps the engine cool by circulating water and coolant throughout the engine. A malfunctioning water pump can cause the engines temperature to increase, even when the radiator has sufficient coolant. This may eventually result in permanent damage to the engine. The pump attaches to the timing chain cover on the front of the engine block. You will need to drain the cooling system when replacing the pump.

Instructions

1

Position a sealable container under the radiator drain hole and remove the drain plug. Wait for the coolant to drain into the container. Seal the container for later use. Replace the drain plug.

2

Remove the mounting bolts for the cooling fan shroud with a socket wrench. Disconnect the shroud from the radiator. Detach the radiator hose, bypass hose and heater hose from the water pump. Disconnect the drive belt and the cooling fan assembly, including the fan spacer and pulley.

3

Remove the alternator mounting bolts with a socket wrench, and move the alternator out of the way to access the water pump. You may also need to remove the power steering pump bracket if the vehicle is so equipped. Disconnect the mounting bolts for the water pump and detach the pump from the timing chain cover. Discard the water pump gasket.

4

Apply a thin layer of sealer to the new gasket. Install the new pump and gasket to the timing chain cover. Tighten the mounting bolts for the water pump to 18 foot-pounds with a torque wrench.

5

Repeat steps two and three in reverse order to complete the installation of the new water pump. Replace the coolant in the radiator.