Multi-layer Steel Offers Higher Sealing Potential MLS head gaskets consist of two to five sheets of spring or carbon steel, which are sandwiched with the sealing material to form multi-layer steel head gaskets. For improved sealing of gases and liquids, beads around combustion chambers and oil/coolant passages increase the local sealing pressure (macro sealing), whilst full-surface or partial elastomer coatings provide additional sealing tightness (micro sealing).
Typical 3-layer MLS head gasket with top sheet, active layer with Wave-Stopper, and bottom sheet beads plus full-surface (interior) and partial (exterior) elastomer coatings improve the sealing potential of these modern sealing systems. Beads for macro sealing, and elastomer coating for micro sealing.
Wave-Stopper® Technology. Dana's proprietary Wave-Stopper® sealing technology exhibits both plastic and elastic characteristics, making it ideal for sealing applications such as cylinder-head gaskets. This technology includes topography, creating a highly uniform seal. In areas where significant force is applied around the bolts, the waves compress more than in areas subjected to less force. Additional topography can be applied based on engine structure. Highly uniform loading reduces oil consumption, bore distortion, and overhead cam distortion. The Wave-Stopper layer, when in the compressed state, forms concentric sealing rings. These sealing rings provide additional micro-sealing at the combustion chamber.
Elastomer Coatings. Used for micro sealing, Victor Reinz® elastomer coatings use only high-quality fluoropolymers. Through controlled sealing pressure, these coatings fill and adapt to engine block and cylinder-head surface roughnesses, scratches, and porosities. Available coatings include full surface and partial coating.
Properties of Sealing Surfaces. Also in future, MLS head gaskets will represent the leading sealing concept. Already today, sealing between cylinder head and engine block is achieved almost exclusively by means of multi-layer steel head gaskets. However, it is not only the head gasket‘s quality that is responsible for perfect sealing. An equally important role is played by the surface qualities of cylinder head and engine block. The demands placed on the surface finish are a decisive factor for reliable sealing results. Therefore, it is essential that the specified values are observed when installing head gaskets. Hereby, there is no difference between composite gaskets and MLS gaskets.
Component Unevennesses and Distortions. Component unevenness and distortion can be determined by means of a straightedge. Measurements are made using the light-gap method. The edge of the test device is placed on the surface, and moved over the bolt holes longitudinally and transversely. Hereby, any unevennesses are made visible by the light gap.
Maximum values for waviness and roughness (grooves and scores) practical measurement using a sensing probe,
and indication of possible leakage channels.
Maximum values for component unevenesses and distortions for passenger cars. Practical measurement using a straightedge and the light-gap method.
For the most demanding intake manifold applications, Victor Reinz offers MaxDry STL steel-carrier gaskets. They feature super premium FKM synthetic rubber, precision-molded onto corrosion-resistant aluminized steel carriers. These gaskets offer maximum protection from exposure to harsh chemical environments and extreme operating conditions.
Surviving OAT Coolants and Extended Service Intervals. Today’s intake manifold gaskets must seal and survive in much more demanding environments than in the past, including exposure to extended life antifreeze, known as OAT (Organic Acid Technology) coolants. For over ten years, Victor Reinz’s U.S.-based factory has been a leading supplier of advanced-technology intake manifold gaskets for Original Equipment, OEM Service and the Automotive Aftermarket. For many applications, most of the molded intake manifold gaskets sold by leading aftermarket brands were manufactured in Victor Reinz® facilities.
Unique Advantages of MaxDry STL®. The GM 3.1/3.4L V6 and the GM 5.0/5.7L V8 gaskets received special attention from Victor Reinz®. The coolant ports in our steel gasket carriers feature “scalloped” openings to reduce stress on the molded rubber seal when compressed on the engine, a major benefit of choosing MaxDry STL® Steel Carrier Intake Manifold Gaskets! Our 3.1/3.4L gaskets also have an easy-to-see advantage. Victor Reinz® has added a patent-pending pushrod installation guide – that’s like having an extra hand helping you assemble the valve train.
High-Grade FKM Molded Synthetic Rubber What makes FKM so special for the molded seals? FKM is a premium fluorocarbon-based synthetic rubber with very desirable properties for automotive and aerospace applications. It resists exposure to a wide range of chemicals, including oil, antifreeze and fuel. It remains resilient and strong at higher temperatures than most rubber compounds can withstand.
More than 90% of Victor Reinz® MaxDry STL® products are designed, manufactured and packaged in the USA!
At Dana, we design our components to offer the most technologically advanced product solutions to fit your needs. Our “electronic window” connector gasket employs the latest advancements in the industry to provide power connections for a variety of plug-ins. Sealed wiring sends an electronic signal directly through the “window” in the gasket, removing potential leak paths and lowering vehicle costs.
Since electrical connections are completed before mating components are even assembled, service can still be easily performed. This window gasket provides power connections to activate components such as solenoids, actuators, sensors, and fuel injectors. Each connection is checked to ensure signal integrity from each circuit while an integrated wiring harness transmits the power.
Dana’s engine sealing solutions include cylinder-head cover modules and oil pan modules. Our engineers work directly with OEMs to develop innovative products using high quality materials that meet their specific engine requirements. We employ custom sealing solutions through our expert problem solving, utilizing regional research and development centers.
With experience in over 35 applications, we design and manufacture cover modules for gasoline or diesel engines. Our engineers work to address all of your needs – emissions; weight; noise, vibration, and harshness (NVH); durability; and cost. Because we design the sealing system as a part of the cover design, this robust module functions as one precise unit.
With fuel economy an ever-growing concern in the marketplace, our designers are constantly seeking new ways to reduce weight under the hood. Our advanced thermoplastic oil pan module integrates multiple parts into a single component, offering considerable reductions in weight and cost compared to a traditional stamped pan with related oil-handling components such as the pick-up tube, baffle, and gasket.
Dana’s MLS transmission separator plates are capable of withstanding three times the sealing pressures of current products in the light-vehicle market. This technology also allows optimized channel paths and smaller valve bodies through the reduction of fasteners that can interfere with desired flow paths.
We leveraged our industry-leading expertise in MLS cylinder-head gasket technology to make this product more durable, enabling advanced multi-speed, dual clutch, and continuously variable transmissions to operate with improved efficiency, reliability, and overall performance.
With this technology, we substantially increased valve body sealing for high-performance transmissions to more than 80 bar and helped automakers eliminate leak paths.
Classical oil seals. The purpose of oil seals is to provide sealing between the rotating crankshaft and the outside. Classical oil seals consist of a metal housing that carries the dynamic sealing lip and also provides the static sealing function. The sealing lip of oil seals is usually manufactured of elastomer material, and is in contact with the surface of the rotating shaft. Hereby, the lip is pressed onto the shaft surface by means of a spring ring. As a result of the rotational movement, there is a sealing gap of approx. 1 m at the lip edge. Oil can enter this gap, which serves to lubricate the sealing lip.
New Demands On Oil Seals. Ongoing developments in engine design result in ever-higher demands on this type of seal. Higher engine speeds and oil temperatures, longer intervals between oil changes, and lubricants with modern additives that react aggressively with the sealing materials require new and lasting solutions. The material for future oil seals is named polytetrafluoroethylene – or simply PTFE.
Trend-setting Advantages. Low friction and minimum power consumption are the decisive advantages offered by PTFE oil seals. These seals can be used without problems also with dry operation or insufficient lubrication. The material’s excellent thermal properties, with an operating range of -130ºC to +200ºC, are unrivalled. Moreover, PTFE is featured by high chemical resistance and a low breakaway torque after standstill.
How it works?
When heated, PTFE attempts to return to its original form. In other words: The material «remembers» its original condition. This phenomenon is known as the plastic memory effect, and permits seals to be built without a pretensioning spring. During manufacture, the sealing lip is shaped as a flat ring, which is molded to the reinforcing ring. During assembly onto the shaft, the initially flat sealing lip expands and folds to match the shaft diameter. As soon as the sealing lip heats up during engine operation, it attempts to return to its original shape.
Integrated oil seal
The outer housing is made of stainless steel. An O-ring of fluoroelastomer ensures optimal static sealing. The internal diameter is perfectly concentric with the outer diameter. The actual sealing lip is made of highly wearresistant and low-friction PTFE. An additional dust seal (rubber lip or felt strip) provides an effective barrier against contaminating particles.
Special Type With Integrated Oil Seal
Integrated oil seals reduce the manufacturing time of series production engines. As only one component needs to be installed, work on the assembly line as well as subsequent leakage is reduced by about one third. Similarly, significant time savings are achievable when replacing the radial crankshaft seals.
Dana’s flexibility creates sealing solutions for every application. Our Victor Reinz® valve stem seals protect from the fouling of exhaust after-treatment devices caused by an increase in hydrocarbon and particulate emissions over time. Each of our valve stem seal designs is evaluated on an oil-metering rate bench test to ensure an optimum oil-metering rate for the best valve train durability, oil consumption, and emissions balance.
Victor Reinz® Ring and Band Valve Seals. For automotive restorers and enthusiasts, our ring and band valve seals still provide the proper amount of lubrication between the valve stem and guide. Used in gasoline and diesel applications, these seals are ideal for engines originally produced without valve seals.
Victor Reinz® Integral Top Valve Seals. A popular choice among automotive OEMs, our integral top valve seals are manufactured using one-of-a-kind processes and techniques that allow us to produce a dependable, yet affordable product. We’ve reduced fluoroelastomer material cost with our top valve seal design to help you make the most out of every dollar.
Victor Reinz® Bonded Valve Seals. Allowing one seal to fit multiple engines, models, and families, our bonded valve seals provide OEMs with the versatility they need plus design simplicity. These seals are typically used for small engines and moderately boosted diesel engines with cast iron cylinder heads.
Victor Reinz® Integral Valve Seals. Integral seals are ideal for both aluminum cylinder heads and high manifold pressures. With our exclusive Allbond™ design specifically for high port pressure, blow-by and seal bursting issues are eliminated. A case hardened valve spring seat provides maximum protection for fragile aluminum.
Our proprietary fluoroelastomer compounds are mixed in-house and fully tested, allowing ultimate control over quality and performance. Each valve stem seal is taken through a state-of-the-art molding and assembly process. Every application uses custom designs and processes that best meet cost, performance, and timing goals. And, prototype and production parts are made in the same facility to ensure a smooth launch to high-volume production.
TAPS is a highly functional engine shielding component composed of various layers, each with a specific job to perform. These shields protect from extreme temperatures, suppress noise, and lower overall mass with the use of thinner materials, leading to improved fuel economy.
Because controlling noise from the exhaust system and its components is a major concern with heat shielding, Dana® is constantly researching how materials can be paired together or developed in different ways to accomplish this goal.
We offer two sound control heat shields – four/five-layer noise barrier shields and micro-perforated sound absorbing shields. Dana’s patented four- or five-layer NVH shields are available in aluminum, Alclad™ or stainless steel, and constructed with two insulating layers featuring an exclusive dimpled acoustic core to provide a sound barrier for engine noises. These barrier shields offer good broadband noise reduction for many different shielding applications.
Micro-perforated sound absorbing shields are also available, which can be tuned to absorb a specific range of frequencies. The micro-perforated layer, in conjunction with a special absorbing mat, are Dana® tuned to meet your noise reduction needs.
Dana® continuously develops shielding systems that meet the increasing demands of automotive OEMs. A team of in-house craftsmen can produce top-of-the-line products to cover any part with our proven manufacturing expertise.
Victor Reinz® direct insulation heat shields are constructed with an aluminum or stainless-steel outer shell and insulated with a high-temperature fiber mat through fully automated forming processes. Popular on many diesel vehicles, our direct insulation heat shields can fully envelop exhaust components as needed.
Dana’s highly durable shielding systems offer premium thermal and acoustic protection for any installation location. Multiple functions can also be combined to further work toward boosting efficiencies and reducing emissions.
Victor Reinz® aluminum heat shields are constructed with wave embossments that enhance rigidity and durability. Special isolators, which reduce the transmission of heat and vibrations at the mounting points, allow the aluminum shields to be used directly on hot components. With a sleek new look, this low mass aluminum heat shield even absorbs wrinkles and creases.
At Dana, we always provide individualized attention to meet your needs and develop shielding systems with technologically advanced materials.
To comply with the latest automotive emissions regulations, highly efficient Victor Reinz® insulated and damped heat shields provide protection for engine and exhaust system components with a Dana specified center layer and metal outer layers. The center layer is specially designed to offer outstanding thermal protection and damping for extreme temperature applications. The high damping value allows us to specify thinner metal layers while still offering outstanding durability. This helps reduce mass by up to 40 percent compared to conventional metal heat shields. The shield features fully hemmed edges to protect worker and technician safety. The hemmed edges also contain the insulation for the life of the shield and stiffen the outer edge.
Vehicle areas with reduced vibration loads and moderate shielding demands – such as the underbody area or the bulkhead, but also the areas around the manifolds and turbochargers.
Dana® is uniquely able to integrate shielding and sealing in one component. Dana® engineers can combine exhaust gaskets with heat shields to meet the ever-changing needs of our customers. We provide customized solutions that incorporate the necessary features required of shielding systems that seamlessly integrate into existing set ups. We also offer the industry’s best exhaust gasket coating, ThermoGlide® 1000, which improves sealability and allows the exhaust components to glide across the gasket, reducing cool-down noise and improving durability.