4.020 MLS Head Gasket .040 - Buick V6

The 4.020 MLS Head Gasket .040 - Buick V6 from Cometic Gaskets is a precision cylinder head gasket engineered for classic and vintage Buick V6 engines requiring dependable sealing performance. This multi-layer steel gasket is designed to maintain compression integrity and prevent coolant or oil leakage between the cylinder head and engine block. Whether you're rebuilding an original engine or restoring a classic Buick, this OEM-replacement gasket delivers the reliability needed for long-term engine durability.

Manufactured from multi-layer steel construction, the 4.020 MLS Head Gasket utilizes a 0.040-inch compression thickness to match factory specifications and maintain proper combustion chamber volume. The 4.020-inch bore diameter is precisely engineered to fit Buick V6 cylinder heads without excessive material or poor sealing characteristics. This gasket's MLS design provides superior conformability to mating surfaces, reducing the risk of blow-out and ensuring a permanent seal even under thermal cycling and vibration. The robust construction resists compression set, a critical factor in preventing leakage as the engine operates through temperature extremes.

This gasket is ideal for Buick V6 engine rebuilds, restorations, and repair applications where OEM-grade sealing performance is required. Installation is straightforward—simply position the gasket between the cylinder head and engine block, then torque the head bolts to manufacturer specifications using a proper sequence pattern. For best results, ensure mating surfaces are clean and flat before installation. The 4.020 MLS Head Gasket .040 - Buick V6 is sold as a single gasket and is compatible with standard Buick V6 cylinder head assemblies of the specified bore diameter.