How to replace a thermostat in a Lincoln Navigator?

Don't drive without a thermostat as it can affect emissions and fuel economy. Before blaming the thermostat, check coolant level, drivebelt tension, and temperature gauge. If the engine takes long to warm up or runs hot without the upper radiator hose being hot, the thermostat is likely faulty and needs replacement. Overheating can cause engine damage. To replace the thermostat, drain coolant below the thermostat housing level, disconnect the upper radiator hose, remove the cover and O-ring seal, and note the thermostat's installation. Install a new thermostat with the correct opening temperature, clean the mating surfaces, and apply RTV sealant to a new gasket or O-ring seal. Reattach the cover, radiator hose, refill the system, check for leaks, and repeat steps if necessary.

Genuine Lincoln Navigator Thermostat

Engine Coolant Thermostat

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6 Thermostats found

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Lincoln Navigator Thermostat Assembly
Part Number: BL3Z-8575-A
$23.06 MSRP: $32.73
You Save: $9.67 (30%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Replaced by: BL3Z-8575-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Thermostat Assembly
Part Number: 7L3Z-8575-B
$21.78 MSRP: $30.91
You Save: $9.13 (30%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 7L3Z-8575-E
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2014 Lincoln Navigator | 8 Cyl 5.4L | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Thermostat Assembly
Part Number: 3L3Z-8575-AC
$21.78 MSRP: $30.91
You Save: $9.13 (30%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 7L3Z-8575-E
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2008 Lincoln Navigator | 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Thermostat Assembly
Part Number: HL3Z-8575-A
$18.58 MSRP: $26.36
You Save: $7.78 (30%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Replaced by: HL3Z-8575-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2019 Lincoln Navigator | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator THERMOSTAT ASY
Part Number: HL3Z-8575-B
$18.58 MSRP: $26.36
You Save: $7.78 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat
- Replaces: HL3Z-8575-A, RT-1238
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2021 Lincoln Navigator | 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator THERMOSTAT ASY
Part Number: ML3Z-8575-A
$22.23 MSRP: $34.55
You Save: $12.32 (36%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2022-2024 Lincoln Navigator | 6 Cyl 3.5 L GAS

Lincoln Navigator Thermostat

It is used to regulate the temperature of the engine in Lincoln Navigator vehicles so that all the necessary operations will work effectively and efficiently. Located close to the radiator, it works as the temperature-sensitive closed-loop control unit that sets the temperature to an ideal value. Several models of Thermostats have been used in navigator models in the past to control fuel injection, including mechanical ones such as the bimetallic strips and wax pellet thermostats. The generally work through change in size due to heat, thus improving on the control of temperatures in engines. The earlier models have also featured the pneumatic systems in which air tubes are adopted in regulating the temperature and which has promoted efficiency and comfort in handling vehicles.

We provide a wide range of Lincoln Navigator Thermostat at the best prices possible. If you need Lincoln Navigator Thermostat, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Lincoln Navigator Thermostat Parts Questions & Experts Answers

Thermostat Assembly
7L3Z-8575-B
Q: How to replace a thermostat in a Lincoln Navigator?
A: Don't drive without a thermostat as it can affect emissions and fuel economy. Before blaming the thermostat, check coolant level, drivebelt tension, and temperature gauge. If the engine takes long to warm up or runs hot without the upper Radiator hose being hot, the thermostat is likely faulty and needs replacement. Overheating can cause engine damage. To replace the thermostat, drain coolant below the thermostat housing level, disconnect the upper radiator hose, remove the cover and O-ring seal, and note the thermostat's installation. Install a new thermostat with the correct opening temperature, clean the mating surfaces, and apply RTV sealant to a new gasket or O-ring seal. Reattach the cover, radiator hose, refill the system, check for leaks, and repeat steps if necessary.