Dorman 911-976 Secondary Air Injection Check Valve

Overview of Dorman Secondary Air Injection Check Valve

The Dorman 911-976 Secondary Air Injection Check Valve is designed to maintain proper air flow within the emission control system of select BMW models. Engineered from cast aluminum with a gray finish, this valve supports efficient operation under a wide range of temperatures and pressures.

• Constructed from durable cast aluminum for long-lasting performance
• Gray color/finish for corrosion resistance and visual identification
• Inlet and outlet size of 0.83 inches for precise fitment
• Maximum pressure rating of 50 psi to handle emission system demands
• Reed valve type ensuring reliable one-way air flow
• Operates effectively within a temperature range of -40°C to 125°C
• Includes one secondary air injection control valve and one gasket for installation

Detailed Product Description

The Dorman 911-976 secondary air injection check valve plays a critical role in the emission control system by preventing exhaust gases from flowing back into the air injection system. Made from cast aluminum, this valve offers strength and resistance to heat and corrosion, which is essential for maintaining system integrity. The reed valve design allows air to flow in one direction only, supporting the reduction of harmful emissions during cold engine starts. With inlet and outlet sizes both at 0.83 inches, it ensures a secure and proper connection within the air injection system. The valve is rated to withstand pressures up to 50 psi and functions reliably across a broad temperature range from -40°C to 125°C, making it suitable for the demanding conditions found in BMW 545i, 645Ci, 745i, and 745Li models.

Compatible BMW Models and Applications

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

• BMW 545i
• BMW 645Ci
• BMW 745i
• BMW 745Li

It is specifically designed to meet the emission control requirements of these models, ensuring proper air injection system function and compliance with environmental standards.

Common Issues Addressed by This Check Valve

• Prevents backflow of exhaust gases into the air injection system
• Helps reduce emissions during cold starts
• Maintains proper air pressure within the secondary air injection system
• Prevents damage to other emission control components caused by reverse flow
• Supports engine performance by ensuring correct air injection timing

Installation Notes and Tips

• Ensure the gasket included is properly seated to prevent leaks
• Verify inlet and outlet sizes match the vehicle’s air injection system tubing
• Inspect surrounding components for wear or damage during installation
• Follow manufacturer torque specifications to avoid overtightening
• Test the valve operation after installation to confirm proper air flow direction

Quality Assurance and Warranty

Dorman manufactures the 911-976 secondary air injection check valve to meet or exceed OEM standards for fit, form, and function. The cast aluminum construction and reed valve design contribute to reliable performance under typical operating conditions. While specific warranty details may vary, Dorman products generally include coverage against defects in materials and workmanship. Consult product documentation or the supplier for exact warranty terms.