Controlling surface roughness and waviness helps engine builders
ensure leak-free gasketed joints
The history of engine development has seen a parallel progression of engine joint design and assembly techniques. The gaskets that seal these bolted joints have witnessed a similar evolution of technology that includes the gasket materials, designs, and even the engine component surfaces that combine to deliver leak-free engine performance to our customers.
The most significant development in recent engine sealing trends has been the emerging dominance of embossed rubber coated metal gaskets – especially cylinder head gaskets – in the assembly of original equipment engines. This gasket technology is often called “MLS” for Multi-Layer Steel and usually consists of multiple layers of embossed rubber coated, spring-temper stainless steel. These gaskets provide improved sealing performance at lower joint loads, but they also demand careful attention to engine component surface finish.