Restore proper engine operating temperature with the Genuine OEM Ford Motorcraft 8C3Z-8575-D Dual Thermostat Assembly. Designed specifically for the 2008-2010 Ford 6.4L Powerstroke, this factory thermostat assembly maintains the precise coolant temperature required for maximum engine efficiency, heater performance, emissions compliance, and overall engine longevity.
Unlike many aftermarket alternatives, the OEM Motorcraft thermostat is engineered to Ford's exact specifications, providing the correct opening temperature and coolant flow characteristics required by the 6.4L Powerstroke cooling system. The assembly includes both thermostats and the factory sealing gasket, making installation straightforward while helping eliminate coolant leaks.
Whether you're replacing a thermostat stuck open causing long warm-up times, poor heater performance, or reduced fuel economy, or one stuck closed causing overheating, this genuine Ford replacement restores your cooling system to factory performance. It supersedes several earlier Ford part numbers and serves as the latest OEM replacement.
Features
- Genuine OEM Ford / Motorcraft component
- Complete dual thermostat assembly
- Includes factory gasket/seal
- Direct bolt-on replacement
- Maintains proper engine operating temperature
- Helps prevent overheating and overcooling
- Restores factory heater performance
- Manufactured to Ford OE specifications
- Replaces several previous Ford service part numbers
Benefits
- Factory-quality fit and reliability
- Proper coolant flow for the 6.4L Powerstroke
- Improves engine warm-up time
- Supports optimal fuel economy and emissions performance
- Helps protect against premature engine wear caused by incorrect operating temperatures
Vehicle Fitment
Ford Super Duty 6.4L Powerstroke Diesel
- 2008 Ford F-250 Super Duty
- 2009 Ford F-250 Super Duty
- 2010 Ford F-250 Super Duty
- 2008 Ford F-350 Super Duty
- 2009 Ford F-350 Super Duty
- 2010 Ford F-350 Super Duty
- 2008 Ford F-450 Super Duty
- 2009 Ford F-450 Super Duty
- 2010 Ford F-450 Super Duty
- 2008 Ford F-550 Super Duty
- 2009 Ford F-550 Super Duty
- 2010 Ford F-550 Super Duty
What's Included
- (1) Genuine OEM Ford Motorcraft Dual Thermostat Assembly (8C3Z-8575-D)
- Integrated gasket/seal
Recommended While You're There
- Upper radiator hose
- Lower radiator hose
- Fresh Motorcraft-approved coolant
- Cooling system flush
- Water pump inspection
- Degas bottle cap replacement if aged
This OEM thermostat assembly is the correct choice for maintaining factory cooling system performance and ensuring your 6.4L Powerstroke continues to operate at the temperature Ford intended.
