The Alliant Power AP63496 is a new thermostat for 2003–2007 Ford 6.0L Powerstroke applications. Alliant’s Engine Coolant Thermostat regulates coolant flow as engine temperature changes.

Features & Benefits

• New Alliant Power Thermostat (Alliant P/N AP63496)
• Fit, form, and function tested to meet or exceed original-equipment standards (per Alliant Power)
• Direct replacement for 3C34-8575-AA / 3C34-8575-AB / 3C3Z-8575-AA
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Application

• Ford F-250 Super Duty / F-350 Super Duty / F-450 Super Duty / F-550 Super Duty (2003–2007)
• Ford Excursion (2003–2005)
• Ford E-350 Club Wagon (2004–2005)
• Ford E-350 Super Duty (2004–2010)
• Ford E-450 Super Duty (2005–2010)
• International 4300 / 4400 (2003)
• International 4200LP (2003–2008)
• International 3200 / 4200 (2003–2010)
• Alliant Power lists additional vehicle applications for this part number

Always verify fitment against your VIN, engine, and OE part number before ordering.

Cross-Reference / Replaces

• Ford: 3C34-8575-AA, 3C34-8575-AB, 3C3Z8575, 3C3Z-8575-AA
• Motorcraft: RT1169
• Navistar: 1839304C91, 1839304C92
• Alliant Power: AP63496

Warranty: Alliant Power’s standard warranty: 24 months with unlimited miles/hours on installed parts (Alliant Power warranty policy, rev. Aug 2025).