Dorman 42321 PCV Valve Grommet - Left

PCV Valve Grommet for OE-Style Fit

This Dorman PCV valve grommet is built to match the fit and function of the original grommet on specified vehicles. Made from rubber with a push-on attachment, it provides a direct replacement for worn or hardened PCV sealing points on applications such as Chevrolet Corvette, Camaro, and Nova.

Part number 42321 is sized for a secure seal and reliable retention at the valve opening. It is a practical replacement for service work on classic GM applications where the original grommet has aged, cracked, or lost its grip.

Key Features

• Rubber construction for flexible sealing performance
• Push-on attachment method for straightforward installation
• Inside diameter: 0.72 in.
• Outside diameter: 1.36 in.
• Thickness: 0.65 in.
• Designed to match original fit and function on specified vehicles
• Part number 42321 for easy identification

Detailed Description

Dorman 42321 is a PCV valve grommet engineered for direct replacement use on select Buick, Oldsmobile, and Chevrolet vehicles. It is shaped to seat properly in the valve cover opening and help maintain a stable connection for the PCV valve. The rubber material is suited for engine-bay service where heat and age can cause the original grommet to harden, shrink, or split.

Compatible applications include 1986 Buick Century, LeSabre, and Riviera; 1986 Oldsmobile 98, Cutlass Ciera, Cutlass Salon, Cutlass Supreme, Delta 88, and Toronado; and Chevrolet Corvette, Camaro, Caprice, Impala, Monte Carlo, Nova, Malibu, El Camino, and Bel Air applications listed for the specified years. If you are searching for a PCV valve grommet for 1971-1975 Chevrolet Camaro or a replacement PCV valve grommet for 1986 Oldsmobile Cutlass Supreme, part number 42321 is the OE-style service part to check.

This part cross-references 423213 and 3989348 for the same application.

Common Problems It Can Help Solve

• Cracked or brittle PCV valve grommet material
• Loose PCV valve fit at the valve cover opening
• Oil vapor leakage around the PCV valve seat
• Hard-to-seat replacement PCV valve during service
• Worn original grommet on older GM engine applications

Installation Notes and Tips

Inspect the valve cover opening before installation and remove any old rubber residue, dirt, or hardened material. Confirm the PCV valve dimensions match the grommet opening before pushing the valve into place. For best sealing results, install on a clean, dry surface and verify the grommet seats evenly without twisting.

Fits 1986 Buick Century, N/A; Fits 1986 Buick LeSabre, N/A; Fits 1986 Buick Riviera, N/A; Fits 1986 Oldsmobile 98, N/A; Fits 1986 Oldsmobile Cutlass Ciera, N/A; Fits 1986 Oldsmobile Cutlass Salon, N/A; Fits 1986 Oldsmobile Cutlass Supreme, N/A; Fits 1986 Oldsmobile Delta 88, N/A; Fits 1986 Oldsmobile Toronado, N/A; Fits 1984 Chevrolet Corvette, N/A; Fits 1971-1982 Chevrolet Corvette, N/A; Fits 1971-1975 Chevrolet Bel Air, N/A; Fits 1971-1975 Chevrolet Camaro, N/A; Fits 1971-1975 Chevrolet Caprice, N/A; Fits 1971-1975 Chevrolet El Camino, N/A; Fits 1971-1975 Chevrolet Impala, N/A; Fits 1973-1975 Chevrolet Malibu, N/A; Fits 1971-1975 Chevrolet Monte Carlo, N/A; Fits 1971-1975 Chevrolet Nova, N/A; Fits 1970 Chevrolet Monte Carlo, Left.

Quality Assurance

Dorman designs this replacement grommet to match original fit and function on the listed vehicles and to provide durable, reliable service in emission-control applications.