Thermostat: Service and Repair

Thermostat - 3.0L (4V)













Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Service and Repair.

3. Disconnect the positive battery cable. For additional information, refer to Battery, Mounting and Cables Battery Disconnect.

4. Disconnect the lower radiator hose from the thermostat housing.

5. NOTICE: Genuine Mazda(R) Extended Life Coolant and Motorcraft(R) Specialty Green Engine Coolant are very sensitive to light. Do NOT allow these products to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes these products to degrade.

NOTE: To install, lubricate the thermostat housing O-ring seal with clean engine coolant.

Remove the 2 bolts, thermostat housing cover, O-ring seal and thermostat.

- To install, tighten to 10 Nm (89 lb-in).

6. To install, reverse the removal procedure.
- Clean and inspect the O-ring seal. Install a new seal if necessary.

7. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Service and Repair.