154-2746
Onan Exhaust Manifold Gasket
Cummins®

The Onan Exhaust Manifold Gasket, identified by part number 154-2746, is a component manufactured by Cummins. This gasket plays a significant role in the exhaust system of truck engines, ensuring a secure seal between the exhaust manifold and the engine block. Cummins, a well-established name in the commercial truck industry, produces this part to meet the demanding requirements of heavy-duty applications.

Function and Operation

The Onan Exhaust Manifold Gasket serves to seal the connection between the exhaust manifold and the engine block. This seal is vital for maintaining the integrity of the exhaust system, preventing exhaust gases from escaping into the engine compartment. By ensuring a tight seal, the gasket helps to maintain efficient exhaust flow, which contributes to overall engine performance and emission control ¹.

Key Features

This Cummins part is designed with specific characteristics to ensure optimal performance in demanding environments. It is made from materials that offer high heat resistance, allowing it to withstand the extreme temperatures generated by the exhaust system. The gasket is also engineered for durability, providing a long service life even under harsh operating conditions. Its design ensures a precise fit, aligning perfectly with the contours of the exhaust manifold and engine block to create an effective seal.

Benefits

Utilizing the Onan Exhaust Manifold Gasket offers several advantages. It contributes to improved engine performance by ensuring a secure seal that prevents exhaust leaks. This results in more efficient exhaust flow, which can enhance engine efficiency and power output. Additionally, a properly sealed exhaust system helps reduce emissions by preventing the escape of unburned fuel and other pollutants. The gasket’s durability and reliability also contribute to the overall reliability of the engine, reducing the likelihood of unexpected failures ².

Installation Process

Proper installation of the Onan Exhaust Manifold Gasket is crucial for ensuring its effectiveness. The process involves cleaning the mating surfaces of the exhaust manifold and engine block to remove any debris or old gasket material. The new gasket should be positioned carefully, ensuring it is aligned correctly with the bolt holes and sealing surfaces. When tightening the manifold bolts, it is important to follow the manufacturer’s torque specifications to avoid over-tightening, which can damage the gasket, or under-tightening, which can lead to leaks.

Maintenance and Troubleshooting

Regular maintenance of the Onan Exhaust Manifold Gasket is important for ensuring its continued performance. Inspecting the gasket during routine engine maintenance can help identify signs of wear or failure, such as cracks or hardening, which may indicate the need for replacement. Common issues with exhaust manifold gaskets include leaks, which can be identified by the smell of exhaust fumes or visible soot around the gasket area. Addressing these issues promptly can prevent more serious engine problems.

Common Issues and Solutions

One of the most frequent problems associated with the Onan Exhaust Manifold Gasket is leakage. This can occur due to wear, improper installation, or exposure to extreme temperatures. To address leaks, the gasket should be inspected and replaced if necessary. Ensuring proper installation techniques and using the correct torque specifications can help prevent future leaks. Additionally, using high-quality gaskets designed for the specific application can enhance durability and performance.

Manufacturer Overview - Cummins

Cummins is a leading manufacturer in the commercial truck industry, known for its wide range of diesel engines and related components. With a history spanning over a century, Cummins has established a reputation for producing reliable, high-performance products. The company’s product range includes engines, filtration systems, emissions solutions, and aftermarket parts, all designed to meet the needs of heavy-duty applications. Cummins’ commitment to quality and innovation has made it a trusted name among truck manufacturers and operators worldwide.

Conclusion

The Onan Exhaust Manifold Gasket (154-2746) is a critical component in the exhaust system of truck engines, ensuring a secure seal between the exhaust manifold and the engine block. Its high heat resistance, durability, and precise fit contribute to improved engine performance, reduced emissions, and overall engine reliability. Proper installation, regular maintenance, and prompt troubleshooting of common issues are essential for maximizing the effectiveness of this Cummins part.