Engine reliability starts with the smallest but most critical components. The Thermostat Seal (OEM 201V06904-0049) is engineered to maintain coolant flow and temperature stability in Howo/Sitrak truck parts systems. This OEM-grade seal prevents leaks, protects the thermostat housing, and ensures your engine operates within the ideal thermal range – reducing wear and extending service life. Designed for rigorous conditions, this seal is a direct replacement for Howo and Sitrak models, delivering factory-fit performance.
Across thousands of miles, the 201V03401-0214 reference aligns with this seal’s application, ensuring compatibility with cooling architectures. Whether you are maintaining a fleet or performing an engine overhaul, this thermostat seal guarantees precision sealing and heat resistance. Upgrade your cooling system with a component that matches the durability of your Howo or Sitrak truck.
Direct OEM replacement for Howo/Sitrak engines, no modifications needed.
Withstands -40°C to +150°C, maintains sealing under extreme heat cycles.
Premium elastomer compound resists coolant, oil, and pressure spikes.
Tested for 500,000+ thermal cycles, outlasts conventional seals.
This thermostat seal (201V06904-0049) is manufactured using high-grade FKM rubber, providing resistance to ethylene glycol and corrosion inhibitors. The precise geometry matches the housing groove perfectly, eliminating bypass leaks. When paired with the 201V03401-0214 thermostat assembly, it ensures steady engine warm-up and prevents overheating – a common issue in haulage. Every seal undergoes 100% pressure testing to guarantee zero leakage at 2.5 bar.
Compatible with MC11, MC13, and WP series engines used in Howo and Sitrak trucks.
Replacing the thermostat seal is straightforward but critical. Clean the housing surface thoroughly, apply a light coat of coolant to the new seal, and torque the housing bolts to 25 Nm. The seal’s self-centering lip ensures correct positioning. Regular inspection of this seal – alongside the 201V03401-0214 thermostat – prevents sudden coolant loss and cylinder head gasket failure. Recommended replacement interval: every 160,000 km or during major cooling system service.
Thermostat Seal 201V06904-0049 is not just a rubber ring – it is the guardian of your engine’s thermal management. In Howo and Sitrak trucks, the cooling system operates under immense pressure and fluctuating temperatures. A minor seal failure can lead to coolant loss, engine overheating, and costly downtime. This seal, manufactured to Sinotruk’s strict specifications, provides a barrier between the thermostat housing and the engine block. Its unique fluorocarbon compound offers resistance to high-temperature aging and chemical degradation from long-life coolants.
The design integrates a raised sealing rib that compresses evenly, compensating for housing surface irregularities. When installed with the corresponding thermostat (referencing 201V03401-0214), it forms a leak-free system that maintains the engine at 85-95°C – the sweet spot for combustion efficiency and component longevity. Many aftermarket seals fail prematurely due to poor material choice, but this component undergoes 48-hour heat aging tests at 160°C to guarantee performance.
For fleet operators, seal performance translates to predictable maintenance schedules. The 201V06904-0049 seal reduces the risk of thermostat sticking, which can cause temperature spikes. By ensuring that coolant flows only when the engine reaches operating temperature, it also supports faster cabin heating in cold climates – a plus for driver comfort and safety. With its precision dimensions, installation is effortless, and the seal’s memory retention prevents compression set even after long periods of inactivity.
FKM rubber with 70 Shore A hardness, tensile strength >12 MPa. Resistance to ASTM #1 oil, coolant, and ozone. The seal’s low compression set (≤20% after 22h at 150°C) ensures long-term sealing force. Compatible with all ethylene glycol and propylene glycol coolants used in Howo/Sitrak trucks. This seal is also resistant to diesel and lubricant contamination, common in engine bays.
Direct replacement for OEM 201V06904-0049. Also fits applications referencing 201V03401-0214 as thermostat assembly. Confirmed fitment: Howo T5G, T7H, Sitrak C7, C9, and Sinotruk HV5 series. Always verify housing diameter before installation. This seal is also backward compatible with older MC07 engines when used with appropriate adapter housing.
The Thermostat Seal 201V06904-0049 is the definitive choice for Howo and Sitrak owners who demand reliability. Its FKM construction, precise dimensions, and thermal resilience make it an essential component for cooling system integrity. When paired with the 201V03401-0214 thermostat, this seal ensures that your engine operates at peak efficiency, reducing fuel costs and minimizing emissions. With a long service life and easy installation, it is the smart investment for any truck. Whether you are in the workshop or on the road, this seal gives you peace of mind – because every mile counts.
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