Base Gasket, for 40-42 Weber DCNF Carburetors, Pair

EMPI Base Gaskets for Weber 40/42 DCNF Carburetors

Product Overview and Fitment

These EMPI base gaskets are specifically engineered for Weber 40 and 42 DCNF carburetors. Designed to create a reliable seal between the carburetor base and the intake manifold, these gaskets are essential for preventing vacuum leaks that can cause erratic idling and poor engine performance. This pair is ideal for air-cooled VW enthusiasts running dual-carburetor setups on Type 1, Type 2, or Type 3 engines, as well as custom Dune Buggy applications.

Pro Tech Tips for Installation

Verify Flange Flatness: Before installing your new gaskets, use a precision straight edge to check both the carburetor base and the intake manifold flange. Over time, heat and over-tightening can cause these surfaces to warp. If they are not perfectly flat, even a new gasket may fail to provide a complete seal.

Proper Torque Sequence: When securing the carburetor to the manifold, tighten the nuts in a gradual, alternating pattern. Avoid over-torquing, as DCNF carburetor "ears" are prone to cracking or bending if too much pressure is applied. A firm, even snugness is all that is required to compress the gasket material effectively.

Inspect for Vacuum Leaks: Once the installation is complete and the engine is running, spray a small amount of carburetor cleaner around the base of the carb. If the engine RPM changes, you still have a vacuum leak. Ensuring a perfect seal here is critical for achieving a smooth sync between dual carburetors.