Ford Mustang (1999-2004) Service Manual: Thermostat - 4.6L(4V)

Material

Item Specification
Motorcraft Premium Gold Engine Coolant VC-7-A (in Oregon VC-7-B) (yellow color) WSS-M97B51- A1

Removal and Installation

1. With the vehicle in neutral, position it on a hoist. For additional information, refer to Section.

2. Drain the engine coolant. For additional information, refer to Cooling System Draining, Filling and Bleeding in this section.

3. Remove the thermostat housing bolts.

Thermostat - 4.6L(4V)

4. Remove the coolant thermostat.

1. Separate the thermostat housing.

2. Remove the coolant thermostat and the O-ring seal.

  • Inspect the O-ring seal. Install a new seal, if necessary.

Thermostat - 4.6L(4V)

5. NOTE: The thermostat is indexed and must be returned to the original location.

NOTE: Make sure the new O-ring seal is secure around the thermostat.

To install, reverse the removal procedure.

6. Fill the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding in this section.

    Thermostat - 4.6L(2V)
    Material Item Specification Motorcraft Premium Gold Engine Coolant VC-7-A (in Oregon VC-7-B) (yellow color) WSS-M97B51- A1 Removal and Installation 1. Drain the engine coola ...

    Bypass Tube - 3.8L
    Material Item Specification Motorcraft Premium Gold Engine Coolant VC-7-A (in Oregon VC-7-B) (yellow color) WSS-M97B51- A1 Removal and Installation 1. Drain the engine coola ...

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