How to service the thermostat for the 5.4L and 6.8L engines on Ford F-250 Super Duty?

Service thermostat in 5.4L and 6.8L engines- Drain cooling system, remove air cleaner outlet pipe and disconnect upper radiator hose. Take out the thermostat housing and remove the O-ring, clean the surfaces, fit a new O-ring and tighten the bolts to 10 Nm and then reverse the process.

How to service and repair the thermostat for 5.4L and 6.8L engines on Ford F-250 Super Duty?

To service the 5.4L and 6.8L engine thermostat, drain, disconnect the air cleaner outlet pipe and unbolt thermostat housing. Wipe off, replace lubricated O-ring, tighten the bolts to 10 Nm, and undo the steps of the removal, to finish the work.

OEM Ford F-250 Super Duty Thermostat

Engine Coolant Thermostat

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12 Thermostats found

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Ford F-250 Super Duty Thermostat Part Number: F6TZ-8575-EA
$45.11 MSRP: $71.64
You Save: $26.53 (38%)
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Product Specifications
- Other Name: Thermostat Assembly
- Replaces: F6TZ-8575-AA, F6TZ-8575-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2003 Ford F-250 Super Duty | Lariat, XL, XLT | 10 Cyl 6.8 L GAS, 8 Cyl 5.4 L GAS, 8 Cyl 6.0 L DIESEL, 8 Cyl 7.3 L DIESEL
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Ford F-250 Super Duty Thermostat Part Number: 8C3Z-8575-D
$56.58 MSRP: $93.09
You Save: $36.51 (40%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: 8C3Z-8575-B, 8C3Z-8575-C, 8C3Z-8592-J, RH-202, 8C3Z-8592-M, RH-186
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2010 Ford F-250 Super Duty | Cabela's, FX4, Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 8 Cyl 6.4 L DIESEL
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Ford F-250 Super Duty Thermostat Part Number: 7L3Z-8575-E
$20.68 MSRP: $32.00
You Save: $11.32 (36%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 7L3Z-8575-D, 7L3Z-8575-B, AL3Z-8575-B, RT-1196, RT-1230, 3L3Z-8575-AA, 3L3Z-8575-AC, 7L3Z-8575-C, AL3Z-8575-A, RT-1204, RT-1234, RT-1178, RT-1229, RT-1165
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2022 Ford F-250 Super Duty | Cabela's, FX4, Harley-Davidson Edition, King Ranch, Lariat, Platinum, XL, XLT | 10 Cyl 6.8 L GAS, 8 Cyl 5.4 L GAS, 8 Cyl 6.2 L FLEX
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Ford F-250 Super Duty Thermostat Part Number: HC3Z-8575-B
$36.98 MSRP: $58.73
You Save: $21.75 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2022 Ford F-250 Super Duty | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL
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Ford F-250 Super Duty Thermostat Part Number: 7C3Z-8575-B
$12.60 MSRP: $20.00
You Save: $7.40 (37%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Manufacturer Note: THERMOSTAT, WTR
- Replaces: YC2Z-8575-BC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2010 Ford F-250 Super Duty | Cabela's, FX4, Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 10 Cyl 6.8 L GAS
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Ford F-250 Super Duty Thermostat, Driver Side Part Number: BC3Z-8575-C
$42.71 MSRP: $67.82
You Save: $25.11 (38%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat, Left; Engine Coolant Thermostat
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2016 Ford F-250 Super Duty | King Ranch, Lariat, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL
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Ford F-250 Super Duty Thermostat, Passenger Side Part Number: BC3Z-8575-B
$21.18 MSRP: $33.64
You Save: $12.46 (38%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat, Right; Engine Coolant Thermostat
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2016 Ford F-250 Super Duty | King Ranch, Lariat, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL
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Ford F-250 Super Duty Thermostat Housing Part Number: 3C3Z-8575-AA
$40.08 MSRP: $63.64
You Save: $23.56 (38%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat; Thermostat Housing Cover; Thermostat
- Manufacturer Note: Themostat and connector asy - #3C34 8575-AA - (Navistar ID 1839304C91) - includes gasket
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2007 Ford F-250 Super Duty | Harley-Davidson Edition, King Ranch, Lariat, XL, XLT | 8 Cyl 6.0 L DIESEL
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Ford F-250 Super Duty Thermostat Part Number: HC3Z-8575-C
$146.56 MSRP: $232.73
You Save: $86.17 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Automatic Transmission Oil Cooler Thermostat; Engine Coolant Thermostat
- Replaces: RT-1237, HC3Z-8575-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2017-2022 Ford F-250 Super Duty | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL
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Ford F-250 Super Duty Thermostat Part Number: BC3Z-8575-E
$42.52 MSRP: $66.36
You Save: $23.84 (36%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: BC3Z-8575-A, RT-1231, RT-1205, BC3Z-8575-D
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2024 Ford F-250 Super Duty | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL
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Ford F-250 Super Duty Thermostat Part Number: LC3Z-8575-A
$23.27 MSRP: $36.00
You Save: $12.73 (36%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2024 Ford F-250 Super Duty | King Ranch, Lariat, Platinum, XL, XLT | 8 Cyl 6.8 L FLEX, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
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Ford F-250 Super Duty Thermostat Part Number: PC3Z-8575-A
$46.02 MSRP: $71.82
You Save: $25.80 (36%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2023-2024 Ford F-250 Super Duty | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL

Ford F-250 Super Duty Thermostat

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Ford F-250 Super Duty Thermostat Parts and Q&A

Thermostat Housing
3C3Z-8575-AA
Q: How to service the thermostat for the 5.4L and 6.8L engines on Ford F-250 Super Duty?
A: Service thermostat in 5.4L and 6.8L engines- Drain cooling system, remove air cleaner outlet pipe and disconnect upper radiator hose. Take out the Thermostat Housing and remove the O-ring, clean the surfaces, fit a new O-ring and tighten the bolts to 10 Nm and then reverse the process.
Thermostat
7C3Z-8575-B
Q: How to service and repair the thermostat for 5.4L and 6.8L engines on Ford F-250 Super Duty?
A: To service the 5.4L and 6.8L engine thermostat, drain, disconnect the air cleaner outlet pipe and unbolt Thermostat Housing. Wipe off, replace lubricated O-ring, tighten the bolts to 10 Nm, and undo the steps of the removal, to finish the work.