Browse Publications Technical Papers 2003-01-0474

MLS Cylinder Head Gasket Wave Stopper 2003-01-0474

The Multi-Layer Steel (MLS) cylinder head gasket's combustion seal feature that we commonly refer to as a stopper, is a zone of the gasket at the bore opening which is thicker than the rest of the gasket. MLS gaskets with stoppers have traditionally been constructed of either a thin folded layer (0.10-0.15mm), an embossed spacer layer, a welded shim, or combinations of multiple layers folded in complex relationships.
The “Wave Stopper” design is a new method of integrating the stopper effect into an active layer (spring steel layer with mechanical embossments functioning as springs). A single layer with the wave stopper can now perform the double function of both a stopper and an active layer with one layer.
The wave stopper height can be optimized to meet the rigidity requirements of each individual engine, and can even be easily contoured to provide topography if needed. We're not locked into a single constant stopper thickness all around the bore. The stopper height is not restricted by steel thickness like a foldover stopper or welded shim.
This paper will describe the design details and performance benefits of the wave stopper concept.


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