1. Commercial Truck Engine Cooling Offers
  2. sku: 8395463363032752
  3. CUMMINS 3990380C1

CUMMINS 3990380C1 Thermostat Outlet Tube

fits model: Isx.

3990380c1 Cummins Used Isx Thermostat Outlet Tube -

( Brand: Cummins ), ( Manufacturer Part Number: 3990380C1 ), ( Type: Housing )

Review CUMMINS Used Thermostat Outlet Tube fits ISX

The Cummins 3990380c1 ISX Thermostat Outlet Tube is an essential component of the cooling system in Cummins ISX engines. This tube is specifically designed to connect the thermostat housing to the engine's water jacket, allowing coolant to circulate effectively between the engine and the thermostat.

The Cummins ISX Thermostat Outlet Tube is made from high-quality materials, including corrosion-resistant steel for durability and longevity. It features a smooth, polished finish that not only looks great but also helps to minimize turbulence in the coolant flow, ensuring efficient heat transfer and even temperature distribution.

The tube measures approximately 3 inches in length and has a diameter of 1.25 inches. It is designed to fit perfectly with the Cummins ISX thermostat housing and engine water jacket, ensuring a secure and leak-free connection. The tube comes with a gasket to ensure a tight seal between the thermostat housing and the engine.

The Cummins 3990380c1 ISX Thermostat Outlet Tube is an OEM (original equipment manufacturer) replacement part, meaning it is manufactured to the same exacting standards as the original equipment used in the engine. It is recommended that this part be replaced whenever the thermostat is changed to ensure optimal engine performance and cooling system efficiency.

Installing the Cummins ISX Thermostat Outlet Tube is a straightforward process, and it comes with clear installation instructions to make the job as easy as possible for the mechanic or DIY enthusiast. Overall, this tube is an essential component of the cooling system in Cummins ISX engines, and it is an investment that will help ensure the longevity and reliability of the engine.

Pros and Cons of Buying a Cummins ISX 3990380C1 Thermostat Outlet Tube

The Cummins ISX 3990380C1 Thermostat Outlet Tube is an essential component of the cooling system in Cummins ISX engines. This part is responsible for connecting the thermostat to the engine and regulating the coolant flow. Here are some pros and cons of buying this part to help you make an informed decision.

Pros:

1. Improved Engine Performance: A faulty thermostat outlet tube can cause poor engine performance and even engine damage. Replacing this part can help restore optimal engine performance and improve fuel efficiency.

2. Reliability: Cummins is a reputable manufacturer known for producing high-quality engine components. The ISX 3990380C1 Thermostat Outlet Tube is no exception, providing reliable functionality and durability.

3. Prevents Cooling System Damage: A damaged or leaking thermostat outlet tube can cause coolant loss, leading to damage to other cooling system components. Replacing this part can prevent costly repairs and engine damage.

4. Easy Installation: This thermostat outlet tube is designed for easy installation, making it a convenient option for DIYers and professional mechanics alike.

Cons:

1. Cost: Replacing the Cummins ISX 3990380C1 Thermostat Outlet Tube can be an expensive investment, especially for those operating on a tight budget.

2. Availability: Depending on the location and availability, finding this specific part may require additional time and effort.

3. Possibility of Other Cooling System Issues: Replacing the thermostat outlet tube does not guarantee that all cooling system issues have been resolved. Other components, such as the water pump or radiator, may also need to be checked and replaced.

Conclusion:

The Cummins ISX 3990380C1 Thermostat Outlet Tube is an essential component for maintaining optimal engine performance and cooling system functionality. While the cost and availability may be a concern, the reliability, improved engine performance, and prevention of costly repairs make this investment worthwhile. Ultimately, the decision to buy this part depends on individual circumstances and priorities.

Recommendation:

If you're experiencing cooling system issues or suspect that your thermostat outlet tube may be faulty, it's recommended to replace it. By investing in a high-quality Cummins ISX 3990380C1 Thermostat Outlet Tube, you can restore engine performance, prevent potential damage to other cooling system components, and enjoy peace of mind on the road.

Details:

Items are also for sale locally. Part Number 3990380C1. Shipping Charges Are For The Continental US. For Sale Here Is A Used Cummins ISX Thermostat Outlet Tube.

All parts listed to fit these manufacturers are replacement aftermarket.

part #: 3990380c1 price

  • $117.00

specifications coenginecooling:

  • for models: Isx
  • brand: Cummins
  • mpn: 3990380c1
  • type: Housing

seller coenginecooling:

  • # reviews: 977
  • rating: 99.1%
  • city: Coopersville, Michigan

returns coenginecooling:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer

general coenginecooling:

  • condition: Used
  • Commercial Truck Parts > Engine Cooling > Other Engine Cooling

payments coenginecooling:

  • other
  • wallet: Apple-pay
  • credit card: Visa

shipping coenginecooling:

  • class: Standard, Expedited, One-day
  • type: Calculated
  • cost: $50.07
  • carrier: UPS
  • transit: 3-6 Days
  • service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air

offer coenginecooling:

  • sold: 0
  • options: Ship-to-home
  • started: November 26, 2025
  • availability: In Stock
  • quantity: 1
for models: isx, type: housing,
category: auto parts > commercial truck parts > engine cooling, sku: 8395463363032752,
Cummins 3990380C1 Is Similar To:
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1 offer $117.00 USD
  • Used. Offer #1 priced at $117.00 + $53.05 shipping estimate = $170.05* total. For Sale Here Is A Used Cummins ISX Thermostat Outlet Tube. Part Number .+$53.05 shipping

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