Dorman 911-624 Secondary Air Injection Check Valve - Left

Reliable Secondary Air Injection Check Valve for Lexus and Toyota

The Dorman 911-624 Secondary Air Injection Check Valve is designed to maintain proper air flow in the emission control system of select Lexus and Toyota models. Engineered with durable materials, this check valve helps support efficient emission reduction and engine performance.

• Constructed with a combination of aluminum and plastic for durability and corrosion resistance
• Measures 8 inches in length with a compact design for easy installation
• Features two ports with inlet size of 0.875 inches and outlet size of 0.716 inches
• Maximum pressure rating of 4.4 psi suitable for secondary air injection systems
• Operates reliably within a temperature range of -40°F to 250°F
• Includes one secondary air injection check valve and one gasket for a complete replacement
• Mounting hole diameter of 0.356 inches ensures secure attachment

Durable Design and Precise Fitment for Emission Control

The Dorman 911-624 check valve is specifically engineered for the secondary air injection system, which helps reduce harmful emissions by injecting fresh air into the exhaust stream during cold starts. Its check valve design prevents exhaust gases from flowing back into the air injection system, protecting components and maintaining system integrity. The combination of aluminum and plastic materials provides a balance of strength and resistance to heat and corrosion, ensuring long-lasting performance in demanding engine environments.

Compatible Vehicles and Applications

This secondary air injection check valve is compatible with the following vehicles:

• Lexus GX460
• Toyota Sequoia
• Toyota Tundra

Use the Dorman 911-624 to address issues related to the secondary air injection system, including:

• Check valve failure causing backflow of exhaust gases
• Emission control system warning lights or codes
• Reduced engine performance during cold starts
• Unusual noises from the air injection system
• Failed emissions tests due to air injection malfunctions

Installation Notes and Tips

Installation of the Dorman 911-624 secondary air injection check valve requires basic mechanical skills and tools. Ensure the engine is cool before beginning work. Remove the old check valve carefully to avoid damage to surrounding components. Use the included gasket to create a proper seal and prevent leaks. Verify that the mounting hole diameter of 0.356 inches aligns with the vehicle’s mounting points. After installation, inspect for leaks and proper operation of the air injection system.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications. The 911-624 secondary air injection check valve undergoes rigorous quality control to ensure reliable performance and durability. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship under normal use.