Dorman 904-133 Fuel Injector O-Ring Kit

Reliable Fuel Injector O-Ring Kit for Chevrolet and GMC Trucks

The Dorman 904-133 Fuel Injector O-Ring Kit provides essential sealing components designed specifically for heavy-duty Chevrolet and GMC trucks. This kit includes multiple o-rings and gaskets engineered to maintain proper fuel system integrity and prevent leaks in demanding conditions.

• Includes 8 black rubber o-rings with precise dimensions for optimal sealing
• Contains 4 fuel rail gaskets and 1 return line gasket for comprehensive fuel system service
• O-rings feature round rim shape and thickness of 0.07 inches for durability
• Inside diameters of 0.426 and 0.739 inches accommodate various injector sizes
• Outside diameters of 0.566 and 0.879 inches ensure a secure fit
• Package also includes 4 crush washers for proper sealing of fuel connections

Detailed Description of Dorman 904-133 Fuel Injector O-Ring Kit

This fuel injector o-ring kit by Dorman is crafted from durable black rubber material designed to withstand exposure to fuel and engine heat. The kit’s o-rings and gaskets are sized to fit fuel injectors and fuel rails on Chevrolet Sierra 2500 HD, Sierra 3500, Silverado 2500 HD, and Silverado 3500 models. The round rim shape and specific thickness of the o-rings help maintain a tight seal, preventing fuel leaks and ensuring consistent fuel delivery. The included crush washers provide additional sealing support for fuel line connections, reducing the risk of leaks and maintaining system pressure.

Compatible Vehicles and Common Applications

• Compatible with Chevrolet Sierra 2500 HD and Sierra 3500 fuel injector service
• Designed for use on Chevrolet Silverado 2500 HD and Silverado 3500 fuel systems
• Ideal for addressing fuel injector leaks and fuel rail gasket wear
• Helps resolve issues related to fuel pressure loss and injector seal failure
• Supports maintenance and repair of fuel return line connections

Installation Notes and Tips

• Ensure all old o-rings and gaskets are fully removed before installation
• Lubricate new o-rings with clean engine oil or recommended lubricant to ease installation
• Inspect fuel injector ports and fuel rail surfaces for damage or debris
• Torque fuel rail bolts and fittings to manufacturer specifications to avoid leaks
• Check for fuel leaks after installation and before engine startup

Quality Assurance and Warranty Information

Dorman manufactures the 904-133 Fuel Injector O-Ring Kit to meet or exceed OEM specifications for fit and function. The rubber material and precise dimensions ensure reliable sealing performance under typical operating conditions. While specific warranty details may vary, Dorman products generally include a limited warranty against defects in material and workmanship. Refer to Dorman’s official documentation for complete warranty terms.