Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2004FOCUS ZX5, 2.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLINGREMOVAL AND INSTALLATIONTHERMOSTAT HOUSING - SVTREMOVAL

2004 Ford Focus ZX5, 2.3 Z, Standard

Thermostat Housing - SVT: Removal

2004 Ford Focus ZX5, 2.3 Z, StandardSECTION Removal

Drain the cooling system. For additional information, refer to COOLING SYSTEM DRAINING, FILLING AND BLEEDING .
Remove the ignition coil cover.
1. Detach the retaining clips.
2. Detach the coolant pipe from the retaining clip.
Fig 1: Removing Ignition Coil Cover
Courtesy of FORD MOTOR CO.
Using the special tool, disconnect the coolant hoses from the thermostat housing.

Fig 2: Disconnecting Coolant Hoses
Courtesy of FORD MOTOR CO.
Disconnect the engine coolant temperature (ECT) sensor electrical connector.

Fig 3: Disconnecting ECT Sensor Electrical Connector
Courtesy of FORD MOTOR CO.
Remove the thermostat housing retaining bolts.

Fig 4: Removing Thermostat Housing Retaining Bolts
Courtesy of FORD MOTOR CO.
Using the special tool, detach the coolant hose from the thermostat housing and remove the thermostat housing.

Fig 5: Detaching Coolant Hose From Thermostat Housing
Courtesy of FORD MOTOR CO.
Remove and discard the O-ring seal.

Fig 6: Removing O-Ring Seal
Courtesy of FORD MOTOR CO.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.