CUMMINS 3971371 Isb Valve Cover Breather Tube

( Brand: Cummins ), ( Manufacturer Part Number: 3971371 ), ( Type: Valve Cover )

Review CUMMINS Used Isb Valve Cover Breather Tube

The Cummins ISB 3971371 Valve Cover Breather Tube is an essential component of the engine breathing system in Cummins ISB (Inline Six-Cylinder B Series) engines. This tube allows the engine to expel excess crankcase gases into the intake manifold, reducing the pressure within the crankcase and preventing oil from being sucked into the combustion chamber.

The valve cover breather tube is manufactured using high-quality materials that ensure durability and reliability. It is made from reinforced rubber, which is resilient to heat, oil, and other engine fluids. This material also provides excellent flexibility, enabling the tube to expand and contract with temperature changes, while maintaining a secure seal.

The Cummins ISB 3971371 Valve Cover Breather Tube features a smooth, oval design that ensures easy installation. It is engineered to fit perfectly with the valve cover and intake manifold of the Cummins ISB engine. The tube measures approximately 17 inches in length and 1.5 inches in diameter, making it a precise fit for the application.

The end connections of the tube are equipped with O-rings, which create a tight seal and prevent any leaks. The O-rings are made from a durable, oil-resistant material that can withstand the harsh conditions of the engine compartment.

This Cummins valve cover breather tube is an excellent replacement for worn-out or damaged original equipment. It is designed to meet or exceed the performance specifications of the OEM part, ensuring optimal engine performance and longevity.

Installing the Cummins ISB 3971371 Valve Cover Breather Tube is a straightforward process. It can be installed in about an hour, depending on the mechanic's experience level. The installation process involves removing the old breather tube, cleaning the connections, and installing the new tube, securing it with the clamps provided.

In summary, the Cummins ISB 3971371 Valve Cover Breather Tube is a crucial component in the engine breathing system that ensures proper crankcase ventilation and reduces engine pressure. Made from high-quality reinforced rubber, this tube offers excellent durability, flexibility, and a tight seal. It is designed for easy installation, making it a valuable investment for Cummins ISB engine owners seeking optimal engine performance and longevity.

1. OEM Part: This breather tube is a genuine Cummins part, ensuring a perfect fit and compatibility with your engine.

2. Improved Engine Performance: A faulty or worn-out breather tube can cause engine performance issues. Replacing it with a new one can help improve overall engine performance and efficiency.

3. Reduced Emissions: A malfunctioning breather tube can cause increased engine emissions. Replacing it can help minimize emissions, making your vehicle more eco-friendly.

4. Longer Engine Life: A new breather tube can help prolong the life of your engine by preventing harmful contaminants from entering the crankcase.

1. Cost: Original equipment manufacturer (OEM) parts, such as the Cummins ISB valve cover breather tube, tend to be more expensive compared to aftermarket alternatives.

2. Availability: Depending on your location and the availability of Cummins dealerships or parts suppliers, it might take some time to source and receive this part.

3. Installation Complexity: Installing the breather tube might require specialized tools and technical knowledge, which could add to the overall cost and time.

The Cummins ISB valve cover breather tube (Part Number: 3971371) is an essential component of your engine that ensures proper crankcase ventilation. Though it comes with a higher cost and potential installation complexity compared to aftermarket alternatives, the benefits of using a genuine OEM part include improved engine performance, reduced emissions, and longer engine life. If you value these advantages and have the resources to cover the additional cost and installation time, then purchasing this part is a worthwhile investment.

If you are experiencing engine performance issues, increased emissions, or are planning routine maintenance, investing in a new Cummins ISB valve cover breather tube (Part Number: 3971371) is a recommended course of action. Ensure that you have the necessary tools and technical knowledge for installation, or consult a professional mechanic to complete the installation process. This investment in a new breather tube can lead to better engine performance, improved fuel efficiency, and a longer engine life.

Details:

Items are also for sale locally. Part Number 3971371. Shipping Charges Are For The Continental US. For Sale Here Is A Used Cummins ISB Valve Cover Breather Tube.

All parts listed to fit these manufacturers are replacement aftermarket.

part #: 3971371 prices

• $44.00-$154.00

specifications rashcovers:

• brand: Cummins
• mpn: 3971371
• type: Valve Cover

payments rashcovers:

• credit card: Diners-club
• other
• wallet: Google-pay

returns rashcovers:

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

shipping rashcovers:

• transit: 2-6 Days
• carrier: UPS
• cost: $18.34
• class: Standard, Expedited, One-day
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air
• type: Calculated

offer rashcovers:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• quantity: 1
• started: December 3, 2025

seller rashcovers:

• rating: 99.1%
• city: Coopersville, Michigan
• # reviews: 1007

general rashcovers:

• condition: Used
• Commercial Truck Parts > Engines Components > Valve Covers

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