Dorman 42321 PCV Valve Grommet - Left

Reliable PCV Valve Grommet for Buick, Chevrolet, and Oldsmobile

The Dorman 42321 PCV valve grommet is designed to provide a secure and durable seal for the positive crankcase ventilation system in select Buick, Chevrolet, and Oldsmobile vehicles. Made from quality rubber, this grommet ensures proper fit and function to maintain emission control system integrity.

• Constructed from durable rubber material for flexibility and longevity
• Inside diameter of 0.72 inches for precise PCV valve fitment
• Thickness of 0.65 inches to provide a tight seal and prevent leaks
• Outside diameter of 1.36 inches for compatibility with OEM mounting points
• Push-on attachment method for straightforward installation
• Compatible with multiple Buick, Chevrolet, and Oldsmobile models including Camaro, Impala, and Cutlass Supreme

Detailed Description of Dorman 42321 PCV Valve Grommet

This PCV valve grommet by Dorman is engineered to replace worn or damaged grommets in the emission control system, specifically designed for use in various Buick, Chevrolet, and Oldsmobile vehicles. The rubber construction offers resistance to heat and oil exposure, which are common in engine compartments. With an inside diameter of 0.72 inches and an outside diameter of 1.36 inches, it fits securely around the PCV valve, preventing vacuum leaks and ensuring proper ventilation of crankcase gases. The 0.65-inch thickness adds durability and helps maintain a consistent seal over time. The push-on attachment method simplifies installation, reducing the need for additional tools or hardware.

Common Applications and Issues Addressed

• Prevents vacuum leaks caused by cracked or hardened grommets
• Maintains proper PCV valve positioning to ensure effective crankcase ventilation
• Helps reduce engine oil leaks around the valve mounting area
• Supports emission control compliance by sealing the PCV system
• Eliminates hissing noises related to faulty grommet seals

Installation Notes and Tips

Before installing the Dorman 42321 PCV valve grommet, ensure the mounting surface and PCV valve stem are clean and free of debris. The push-on design allows for easy placement without additional fasteners. Gently press the grommet onto the valve stem until fully seated, then insert the assembly into the valve cover or intake manifold port. Inspect the seal for any gaps or misalignment to avoid vacuum leaks. This part is compatible with models such as the Chevrolet Camaro, Buick LeSabre, and Oldsmobile Cutlass Supreme, so verify fitment with your specific vehicle year and engine configuration.

Quality Assurance and Warranty

Dorman manufactures the 42321 PCV valve grommet to meet or exceed OEM specifications for material and fit. The rubber composition is selected for durability under typical engine conditions, including exposure to heat and oil. While specific warranty details may vary, Dorman generally offers limited warranties covering defects in material and workmanship. This ensures confidence in the part’s performance and longevity when installed in compatible Buick, Chevrolet, and Oldsmobile vehicles.