Gaskets and seals are static components creating barriers between mating surfaces to prevent leakage of fluids or gases within a vehicle’s engine, transmission, and other systems. These parts are critical in areas like cylinder heads, intake manifolds, oil pans, and around valve stems and crankshafts. Materials range from compressed fiber, rubber, cork, silicone, and metal, selected for compatibility with specific fluids and operating temperatures. Precise dimensional control and surface finish are essential for effective sealing, often achieved through multi-layer shim stock or elastomeric compounds. Failure necessitates replacement to maintain system pressure and prevent contamination or component damage.