Dorman 904-171 Engine Valve Cover Gasket - Left or Right

Overview of Dorman Engine Valve Cover Gasket 904-171

The Dorman 904-171 engine valve cover gasket is designed for reliable sealing in select Chevrolet, GMC, and Hummer vehicles. Constructed from durable silicone, this two-piece gasket set ensures a secure fit and effective sealing for your engine valve cover and rocker box.

• Material: High-quality silicone for heat and oil resistance
• Configuration: Two-piece set including valve cover gasket and rocker box gasket
• Thickness: 3 mm for optimal sealing performance
• Grade Type: Standard grade suitable for everyday engine operation
• Package Contents: 1 valve cover gasket and 1 rocker box gasket

Detailed Product Description

The Dorman 904-171 valve cover gasket is engineered to meet OEM specifications for a range of Chevrolet, GMC, and Hummer models, including Express 2500, Express 3500, H1, Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 3500, Sierra 3500 Classic, Sierra 3500 HD, Silverado 2500 HD, Silverado 3500, and Silverado 3500 HD. Its silicone construction provides excellent resistance to heat, oil, and engine fluids, helping to maintain a tight seal under demanding conditions. The two-piece design includes both the valve cover gasket and rocker box gasket, simplifying installation and ensuring comprehensive sealing of the valve cover assembly.

Common Applications and Issues Addressed

• Prevents oil leaks around the valve cover area
• Reduces engine contamination from external debris
• Maintains proper engine pressure and performance
• Eliminates gasket deterioration caused by heat and oil exposure
• Helps avoid costly engine repairs related to gasket failure

Installation Notes and Tips

• Ensure the valve cover surface is clean and free of old gasket material before installation
• Apply a thin layer of gasket sealant if recommended by the vehicle manufacturer
• Torque bolts to manufacturer specifications to avoid gasket damage
• Inspect the valve cover and rocker box for warping or damage prior to gasket installation

Quality Assurance and Warranty

Dorman 904-171 valve cover gasket is manufactured to meet industry standards for durability and fitment. The silicone material and precise configuration contribute to long-lasting performance. While specific warranty details may vary, Dorman products typically include a limited warranty against defects in material and workmanship, providing confidence in the product's reliability for Chevrolet, GMC, and Hummer vehicles.