Gates 33971 Heavy-Duty Engine Coolant Thermostat

The Gates 33971 is a heavy-duty engine coolant thermostat engineered to precisely regulate engine operating temperature, ensuring optimal thermal efficiency and engine protection. Designed as a direct-fit OEM replacement, this thermostat opens and closes at the correct calibrated temperature to maintain your engine within its ideal operating range — preventing overheating and reducing warm-up times.

Gates thermostats are manufactured to meet or exceed OEM specifications, making the 33971 a trusted choice for professional technicians and fleet operators working on heavy-duty applications. The unit cross-references to OEM part numbers 30278 and 374180, confirming broad OEM equivalency.

Key Features:

• Heavy-duty construction for demanding commercial and fleet applications
• Precision-calibrated temperature rating for consistent engine thermal management
• Direct OEM replacement — no modifications required
• Manufactured to meet or exceed original equipment specifications
• Cross-references OEM part numbers: 30278 and 374180

Gates is a globally recognized leader in engine management and drivetrain components, delivering reliable replacement parts trusted by OEM manufacturers and professional service technicians worldwide.