How to service the thermostat for 4.6L and 5.4L engines on Ford F-150 Heritage?

Serving the thermostat on 4.6L and 5.4L engines starts with draining a portion of the cooling system fluid. First disconnect the upper radiator hose then remove the water outlet connection by unbolting it. The water thermostat service requires removal followed by discarding the O-ring seal. Position the water thermostat in the upper intake manifold using a fresh O-ring seal before reinstallation of the water outlet connection together with its bolts. Install the upper radiator hose before filling the cooling system with its contents.

OEM Ford F-150 Heritage Thermostat

Engine Coolant Thermostat

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2 Thermostats found

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Ford F-150 Heritage 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:
- 2004 Ford F-150 Heritage | SVT Lightning, XL, XLT | 8 Cyl 4.6 L GAS, 8 Cyl 5.4 L BI-FUEL, 8 Cyl 5.4 L CNG, 8 Cyl 5.4 L GAS
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Ford F-150 Heritage Thermostat
Part Number: XL3Z-8575-BA
$14.31 MSRP: $23.09
You Save: $8.78 (39%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Manufacturer Note: Thermostat-192 #XL3E 8575-AA
- Replaces: F85Z-8575-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004 Ford F-150 Heritage | XL, XLT | 6 Cyl 4.2 L GAS

Ford F-150 Heritage Thermostat

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Ford F-150 Heritage Thermostat Parts Questions & Experts Answers

Thermostat
XL3Z-8575-BA
Q: How to service the thermostat for 4.6L and 5.4L engines on Ford F-150 Heritage?
A: Serving the thermostat on 4.6L and 5.4L engines starts with draining a portion of the cooling system fluid. First disconnect the upper radiator hose then remove the water outlet connection by unbolting it. The water thermostat service requires removal followed by discarding the O-ring seal. Position the water thermostat in the upper intake manifold using a fresh O-ring seal before reinstallation of the water outlet connection together with its bolts. Install the upper radiator hose before filling the cooling system with its contents.