Dorman 904-157 Fuel Injector Line - Supply

Overview of Dorman Fuel Injector Line 904-157

The Dorman 904-157 fuel injector line is engineered for reliable fuel delivery in heavy-duty Chevrolet and GMC trucks and vans. Constructed from durable steel with a corrosion-resistant silver zinc finish, this fuel injector line ensures consistent performance under high pressure.

• Material: High-grade steel with zinc plating for corrosion resistance
• Length: 5.75 inches for precise fitment
• Inside diameter: 0.142 inches, outside diameter: 8 mm
• Fittings: Female inlet (M14 x 1.5) and female outlet (M18 x 1.5) with metric coarse threads
• Maximum pressure rating: 25,000 psi
• Designed for one outlet and inlet hose assembly

Detailed Product Description

The Dorman 904-157 fuel injector line is designed specifically for fuel injection systems in select Chevrolet and GMC models, including Express 2500/3500, Savana 2500/3500, Sierra 2500 HD/3500 HD, and Silverado 2500 HD/3500 HD. Made from robust steel, this line features a zinc-plated silver finish that resists rust and wear, extending the service life of the fuel delivery system. The precise dimensions and thread specifications (M14 x 1.5 inlet and M18 x 1.5 outlet) ensure a secure, leak-free connection within the fuel injection system. Rated to withstand pressures up to 25,000 psi, it supports the demanding conditions of heavy-duty diesel and gasoline engines.

Applications and Common Issues Addressed

• Replacement of worn or damaged fuel injector lines in Chevrolet and GMC heavy-duty trucks and vans
• Resolving fuel leaks caused by cracked or corroded injector lines
• Maintaining proper fuel pressure for optimal engine performance
• Preventing fuel delivery interruptions due to line failure
• Supporting fuel system integrity in high-pressure injection setups

Installation Notes and Tips

Ensure the engine is cool and fuel system pressure is relieved before beginning installation. Verify thread compatibility with existing fittings to avoid cross-threading. Use appropriate torque specifications for metric coarse threads (M14 x 1.5 inlet and M18 x 1.5 outlet) to secure fittings without damaging the line. Inspect surrounding components for wear or damage during replacement to maintain overall fuel system reliability.

Quality Assurance and Warranty

Dorman manufactures the 904-157 fuel injector line to meet or exceed OEM standards for fit, form, and function. The steel construction and zinc plating provide durability and corrosion resistance suitable for heavy-duty applications. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship.