Cummins Thermostat Seal 186780 – Essential Seal for Radiator & Engine Cooling
The Cummins Thermostat Seal 186780 ensures a leak-free connection between the thermostat and housing in heavy-duty engines like the ISX and QSX series. First, it helps maintain stable engine temperature. Then, it prevents coolant leaks that could affect performance. Moreover, it’s a precision-fit Cummins genuine parts item built to OEM standards, and it works seamlessly with other Cummins parts and CCEC parts in engine rebuilds.
🔩 Specifications
- Part Number: 186780
- Part Name: Thermostat Seal
- Fitment: EPA13 15L ISX/QSX engines, plus N14, L10, VTA28C series
- Dimensions: ~2.27″ ID × 2.66″ OD × 0.25″ thick
- Material: High-temperature rubber compound
- Condition: Brand new, OEM-grade
- Category: Cooling System Gaskets & Seals
⭐ Key Features
- First, it creates a tight seal between thermostat and housing
- Next, it withstands high heat and pressure common in diesel engines
- Also, it’s easy to install during regular service
- Moreover, its OEM fit prevents coolant bypass
- Finally, it’s a genuine Cummins parts product that’s trusted for durability and accuracy
⚙️ Technical Insights
- Precision Fit: Sized per factory specs to ensure proper sealing and fit in Cummins parts systems
- Heat & Compression Resistance: Rubber compound holds up under repeated heating cycles and high-pressure coolant flow
- OEM Quality: As a Cummins genuine parts seal, it meets strict tolerances and material standards for longevity
🛠 Application Scenarios
This seal is commonly used when:
- Replacing or servicing thermostat or housing in ISX, QSX, N14, or L10 engines
- Preventing coolant leaks during top-end or cooling system rebuilds
- Servicing fleets using genuine Cummins parts and CCEC parts
- Performing maintenance on heavy trucks, buses, or industrial diesel equipment
📦 Availability
The Cummins Thermostat Seal 186780 is in stock and ready for worldwide shipping. To ensure proper fit, please confirm your engine serial number (ESN) with your order. Our team is happy to help with any questions about Cummins parts, Cummins genuine parts, or related CCEC rebuild needs.
