Dorman 904-8040 Fuel Injector O-Ring Kit

Reliable Fuel Injector O-Ring Kit for Precise Sealing

The Dorman 904-8040 Fuel Injector O-Ring Kit provides essential sealing components designed to maintain optimal fuel system performance. Engineered with durable fluoroelastomer material, this kit ensures a secure fit and resistance to fuel and heat degradation.

• Includes 6 injector o-ring replacement seals and 6 injector washers
• O-rings made from high-quality fluoroelastomer for enhanced durability
• Varied inside diameters: 31mm, 34mm, and 35mm to accommodate different injector sizes
• Thickness options of 1.65mm, 2.5mm, and 3mm for precise sealing
• Outside diameters of 36mm, 38.3mm, and 40mm with round rim shape for consistent fit
• Color-coded o-rings in black, blue, and purple for easy identification

Detailed Product Description

The Dorman 904-8040 Fuel Injector O-Ring Kit is designed to replace worn or damaged injector seals in various automotive fuel systems. The fluoroelastomer material offers excellent resistance to fuel, oil, and high temperatures, making it suitable for long-term use in demanding engine environments. The kit includes six o-rings and six washers, covering a range of inside diameters and thicknesses to fit multiple injector configurations. The round rim shape ensures a tight seal to prevent fuel leaks and maintain proper injector function. Color variations help technicians quickly identify the correct size during installation or maintenance.

Common Applications and Issues Addressed

• Prevents fuel leaks caused by deteriorated or cracked injector o-rings
• Eliminates rough idling and engine misfires linked to poor injector sealing
• Helps maintain fuel system pressure for consistent engine performance
• Reduces the risk of fuel odor and potential fire hazards from leaks
• Supports injector replacement or rebuild procedures on compatible vehicles

Installation Notes and Tips

Before installation, clean the injector and fuel rail surfaces thoroughly to remove debris and old sealant. Inspect the injector ports for damage or wear. Lubricate the new o-rings lightly with clean engine oil or recommended lubricant to ease installation and prevent damage. Ensure the correct size o-ring is selected based on inside diameter and thickness to match the injector specifications. Avoid over-tightening fuel rail bolts to prevent deformation of the seals.

Quality Assurance and Warranty

Dorman manufactures the 904-8040 Fuel Injector O-Ring Kit to meet or exceed OEM standards for fit, form, and function. The fluoroelastomer material is selected for its chemical and thermal resistance, ensuring reliable sealing performance. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship.