Motorcraft F6TZ-8575-EA OE Thermostat for 1996–2003 7.3L Powerstroke

Restore precise cooling-system control on your 7.3L Powerstroke with the genuine Motorcraft F6TZ-8575-EA thermostat. This factory-specified OEM part is the exact replacement Ford designed for Super Duty trucks, Excursions, and E-Series vans. It opens at the correct 190–192°F temperature to keep the engine in its optimal operating range—preventing overheating, improving heater performance, and supporting long-term reliability.

Why Choose This OEM Thermostat

• Genuine Motorcraft / Ford part built to original equipment specifications
• Direct-fit replacement—no modifications required
• Durable brass construction for consistent, long-lasting operation
• Wax-element design that reliably regulates coolant flow
• Helps maintain proper engine temperature for better efficiency and reduced wear
• Replaces earlier Ford numbers including F6TZ-8575-AA, F6TZ-8575-BA, and Motorcraft RT-1201

A failing or aftermarket thermostat can cause the 7.3 to run too hot or too cold, leading to poor cabin heat, higher fuel consumption, or cooling-system issues. Installing the correct Motorcraft unit returns the engine to factory temperature control.

Vehicle Fitment

Fits 1996–2003 Ford 7.3L Powerstroke diesel applications, including:

• 1996–1997 F-250 / F-350
• 1999–2003 F-250 / F-350 / F-450 / F-550 Super Duty
• 2000–2003 Excursion
• 1996–2003 E-350 / E-450 / E-550 Super Duty vans

Confirm your specific year, model, and engine before ordering. This is the thermostat only (housing not included).

Keep your legendary 7.3 Powerstroke running at the temperature Ford intended. Choose the Motorcraft F6TZ-8575-EA for a proven, factory-correct repair.