BL3Z-8575-B Engine Coolant Thermostat for Ford

BL3Z-8575-B presents a robust Ford-style thermostat intended for OE-led cooling-system service and truck application review. AutoParts tracks this product as TH260727-003 for quotation, sample review and order traceability.

The source information covers Ford F-150 2011–2020 source application range. Since the OE reference may span several models or production changes, the Model filter stays blank and fitment approval should use vehicle-specific evidence.

Product Technical Specifications

Product type: Engine Coolant Thermostat

Primary OE reference: BL3Z-8575-B

Internal item code: TH260727-003

Vehicle brand: FORD

Model filter: Intentionally left blank; verify by VIN and engine data

Cross-reference numbers: BL3Z-8575-B

Configuration: heavy-duty coolant thermostat with broad valve flange and reinforced spring cage

Verification method: OE catalogue, VIN, engine code and removed-part comparison

Temperature Regulation Under Ford Truck Load

The thermostat controls when hot coolant is released to the radiator, allowing the engine to warm efficiently before higher heat rejection is required. Its spring and wax actuator must respond consistently as load changes.

For towing, idling and long highway operation, stable valve movement supports predictable coolant circulation. A stuck or incorrectly calibrated thermostat can contribute to overheating or persistent under-temperature operation.

Ford F-150 Thermostat Identification

Check the OE reference through VIN, engine option and production year. Compare the original thermostat’s flange diameter, installed height, cage shape and bypass arrangement.

Confirm the specified opening temperature and gasket method for the engine. The listed year range should be treated as a source clue, not a substitute for catalogue verification.

Truck Cooling-System Service Checks

Inspect the housing, coolant passages and radiator cap before fitting the new thermostat. Remove old seal material and confirm that no debris obstructs valve movement.

Use the Ford tightening sequence, refill with the correct coolant and bleed the system. Test temperature stability during idle and raised engine speed before vehicle release.

Wholesale Supply and Sample Approval

Use BL3Z-8575-B as the principal sourcing reference and TH260727-003 as the internal item code. Include required quantity, destination, carton marking and labelling instructions in the enquiry.

For technical approval, buyers may send VIN details, engine information, temperature specification, measurements and images of the removed thermostat. Mixed cooling-system orders can be reviewed before shipment.

Frequently Asked Questions

What role does BL3Z-8575-B play in an F-150 cooling system?

It controls radiator coolant flow according to temperature, helping the engine warm up and reject heat when required.

Is the 2011–2020 year range enough for fitment?

No. Confirm VIN, engine option, production data and the removed thermostat’s dimensions and calibration.

Which parts of the thermostat should match?

Compare flange diameter, cage height, spring arrangement, center actuator, bypass details and opening-temperature marking.

What can cause repeated overheating after replacement?

Air pockets, blocked radiator flow, pump faults, head-gasket problems or an incorrect thermostat can all require diagnosis.

What should a Ford wholesaler provide for pricing?

Send BL3Z-8575-B, TH260727-003, purchase quantity, destination, packaging needs and technical sample requirements.

Request a BL3Z-8575-B Thermostat Quote

Contact AutoParts with OE BL3Z-8575-B, item code TH260727-003, quantity and delivery destination. Confirm compatibility before production ordering or workshop installation.

Application reference: Ford F-150 2011–2020 source application range; verify the exact vehicle through VIN, engine data and removed-part comparison.

Inspection focus: valve flange, spring cage, center actuator, frame supports, bypass feature and opening-temperature specification

Supply note: Quote TH260727-003 with quantity, destination and packing requirements; sample approval is available for B2B orders.