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

To service the thermostat on the 4.6L and 5.4L engine, drain partially off the cooling system, remove upper radiator hose and take off the water outlet by removing the bolts. Install a new thermostat and O-ring, place the outlet back in, reconnect the hose and refill the cooling system.

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 and Q&A

Thermostat
XL3Z-8575-BA
Q: How to service the thermostat for 4.6L and 5.4L engines on Ford F-150 Heritage?
A: To service the thermostat on the 4.6L and 5.4L engine, drain partially off the cooling system, remove upper radiator hose and take off the water outlet by removing the bolts. Install a new thermostat and O-ring, place the outlet back in, reconnect the hose and refill the cooling system.