How to service the thermostat on Ford Flex?

To maintain the thermostat, you need to drain the cooling system and clear the Air Cleaner assembly, unbolt the thermostat housing cover. Install a new O-ring and thermostat, and the appropriate type of coolant, depending on date of manufacture of the vehicle. To complete the service, lubricate the new O-ring, re-install and fill the cooling system.

OEM Ford Flex Thermostat

Engine Coolant Thermostat

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Ford Flex Thermostat Part Number: 1X4Z-8575-B
$15.63 MSRP: $24.18
You Save: $8.55 (36%)
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: 1X4Z-8575-A, 1X4Z-8575-FA, RT-1228, RT-1172
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2019 Ford Flex | Limited, SE, SEL, Titanium | 6 Cyl 3.5 L GAS

Ford Flex Thermostat

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Ford Flex Thermostat Parts and Q&A

Thermostat
1X4Z-8575-B
Q: How to service the thermostat on Ford Flex?
A: To maintain the thermostat, you need to drain the cooling system and clear the Air Cleaner assembly, unbolt the thermostat housing cover. Install a new O-ring and thermostat, and the appropriate type of coolant, depending on date of manufacture of the vehicle. To complete the service, lubricate the new O-ring, re-install and fill the cooling system.