The Other Guys — We Talk To Cometic About Non-Head Gasket Tech

Usually, when it comes to writing tech content articles about gaskets, the focus is upon head gaskets. Probably because they perform such a critical role in the look for horsepower. However , the other gaskets within the engine play a critical role too, receiving their own R& D plus subsequent technological advancements.

While Cometic Gasket has become associated with multi-layer steel head mechanical seals, which can withstand the most severe canister pressures generated, the engineering group has also realized the need for advancing the particular less critical gaskets, both to get increased performance as well as additional long life.

Gone are the days of buying the roll of gasket material plus grabbing a ball-peen hammer to produce intake and exhaust gaskets. Sure is still an option, just like it’s a choice to drill holes with a hand-cranked drill, but far more advanced choices exist today. Whether you have an extremely common combination or a rare, one-off application, Cometic can combine each design and technology to ensure you possess the best gasket possible for your application.

The OE and performance aftermarket are continuously looking for ways to increase the engine’s efficiency, therefore increasing its output. Gasket technologies is very much the same, as power improves, so does the need to seal it. – Micky Hale, Cometic Gasket

The First Quit: Intake Gaskets

While intake gaskets might seem just like a simple application, in reality, they not just respond well to advancements within technology, but have gotten therefore specialized, that different applications may prefer different materials and design. “A blower or turbo motor, will need a reinforced material usually, ” explains Micky Hale, associated with Cometic’s technical sales department. “If the manifold is coming off and on a lot, like a PRO Mod Nitrous oxide engine, we have a different material we might use there. ”

It’s not just the use that can get a new ideal composition of the gasket, possibly. “Some of the small-block Ford plus Chevy engines have a very thin collection between intake runners so we might look at that as well for a different path, ” says Hale. “We may most often use our “KF” Para-aramid synthetic fiber Fiber materials for most options and it also works very well. But if it’s the specialty application, we also have the particular means to cover those as well. ”

Cometic, largely known for its MULTIPLE LISTING SERVICE head gaskets also makes almost every other type of engine gasket you can imagine, in a number of materials, for the proper sealing in a scenario.

For the intake side, there has been a proceed to some integral-to-the-manifold O-ring type closes on the OEM side, leading several to wonder if the traditional intake seal is bound for the fate from the Dodo bird. Not likely, Hale states. “Both the LS and the Gen-III Hemi utilize that type of pushed in place (PIP) seal. The elastomer molded part gets pressed right into a receiving groove of a specific level. By design, it’s not able to below or over-compress the seal, these people work well and can be made from different elastomer, durometer, and cross-sections to do in a host of applications. ”

However , Hale clarifies, the P-I-P seals aren’t the particular end-all, be-all of the intake seal world. “A traditional style seal can be used [in place of a P-I-P seal] for various reasons, ” says Hale. “Maybe the customer needs to change the manifold positioning so the ports line up better or perhaps the port is too large, not really leaving enough room for the receiving grooved. Our traditional-style gaskets can be created using any port shape, and in several thicknesses. ”

P-I-P intake mechanical seals are extremely popular right now and have lots of benefits. However , Hale does explain that they aren’t the end-all-be-all associated with gasket technology.

Running It Out The rear: Exhaust Gaskets

At the other end of the burning process, header gaskets have an perhaps more difficult job to accomplish. While a good intake gasket might need to withstand pressurization of the intake tract at least they are doing so at relatively normal temps. Exhaust gaskets, on the other hand, operate within four-digit temperatures and can be inquired to seal pressures in excess of those an intake manifold sees within boosted applications.

To that particular end, it’s really not surprising that will exhaust gaskets more closely look like head gaskets than intake mechanical seals. “Even today OEMs utilize MULTIPLE LISTING SERVICE technology for this interface, ” states Hale. It’s the best choice for higher temperatures and long service life. We provide a few different exhaust sealing options that all perform very well under a range of conditions. With today’s cars and trucks in service much longer than ever before its extremely important the exhaust gasket can go the length. ”

One of the features considered within the decision-making process of selecting the correct seal is conformability. Ideally, you want the particular gasket to conform to any problems in the cylinder head and header flange surfaces, without giving up strength or even heat tolerance.

Speaking of longevity, how many times perhaps you have seen a header gasket appear in pieces when you remove the a lot more? In addition to sealing well, extended strength is now a critical feature demanded with the market. The first, most durable materials should be familiar to you if you have ever noticed an MLS head gasket. It is composed of multiple layers of stainless-steel, with embossing to act as a springtime, ensuring consistent sealing.

However , while an amazing performer, MULTIPLE LISTING SERVICE gaskets aren’t always the right contact. “We utilize two other materials [for exhaust gaskets] called Armor plus HTS Fiber. They are a page type material with slightly various performance attributes, ” Hale states. “The Armor material is made of a high-temperature Vermiculite and dietary fiber core with laminated carbon metal faces. It features a high-heat capacity with little compressibility, and is usually used on turbo flanges, exhaust manifolds, heat shields, and header mechanical seals. ”

MLS exhaust gaskets, such as head gaskets, are very popular options in both OEM and aftermarket apps, due to its long service life and extraordinary sealing capabilities. But like a mind gasket, the surfaces really need to become almost pristine for MLS mechanical seals to do their job.

Sometimes, the decreased compressibility of an MLS or Armor mechanical seals is a measurable detriment, and in those people cases, the HTS Fiber has got the nod. “The HTS material is certainly constructed from a reinforced graphite dietary fiber facing that utilizes a stainless steel primary, ” Hale says. “The material’s high compressibility works very well upon irregular flange surfaces, and the standard uses are similar, but the stainless-steel primary makes it ideal for use in the ocean industry at the cost of a somewhat reduced heat capability. ”

New and Thrilling Horizons

Something we wondered, is whether or not any one of Cometic’s gaskets have achieved the particular apex as far as the technology inside them. Afterall, we’re just talking about consumption and exhaust gaskets here, correct? Wrong. “I sure hope we all haven’t reached peak performance within engine gaskets, ” Hale states, emphatically. “It’s in our nature in order to always want more. The OE and performance aftermarket are continuously looking for ways to increase the engine’s efficiency, therefore increasing its output. Gasket technologies is very much the same, as power improves, so does the need to seal it. ”

The beginning of a customer-requested application generally comes to Cometic in the form of an actual tracing of the required gaskets. Occasionally CAD data is submitted, making the next step a little easier.

We asked specifically regarding oil pan gaskets. After all, it doesn’t get more “mundane” than a good oil pan gasket, except for perhaps a water pump gasket. “The components and technology of oil skillet gaskets have changed dramatically as time passes. Early on the go-to material has been cork, as better materials came out they were used as cork alternative, providing improved sealing and much better torque retention, to further increase closing, ” Hale explains.

“Encapsulated (rubber-molded) technology was applied where they encapsulate a metal carrier to produce an one-piece part. That will technology eliminates the need for any additional sealants. Then another variant of exemplified called “edge-molded” was developed, whereby the particular elastomer seal is only applied to the advantage instead of encapsulating the entire seal. The particular flat portion of the aluminum company is only responsible for limiting how much it may compress the edge molded bead. ”

Even though you might think about a seal as mundane, does not mean that Cometic isn’t actively focusing on improving it. “We are continuously looking for new gasket technology. In the end, that’s the fun part! We wouldn’t say any one gasket recieve more technology in it than the other, ” contends Hale. “However, I would state each gasket has a different technologies focus depending on the gasket application plus gasket environment. ”

Whether posted as a tracing or as CAD data, Cometic engineers then produce a “drawing” which the machines can lead to instructions to drive the various forms of materials cutters.

To that particular end, the Cometic team 1st has to identify what they are sealing (combustion gasses, extremely thin or heavy liquids), the operating environment, and exactly how the gasket will be sealing. “For instance, with our automotive head mechanical seals, we focus on limiting gasket weary distortion, whereas, with our powersports motor case gaskets, we focus on restricting gasket weeping and crawl away, ” reveals Hale.

“Each situation is very technical yet very different. When limiting bore bias, we are continually looking at gasket embossment technology and gasket materials. Whenever limiting gasket weeping and get out, our focus is to the gasket material itself. What materials is going to be rigid enough to keep the shape and not crawl out, yet at the same time be soft enough in order to seal an imperfect surface with no completely sticking to it? Two extremely technical gaskets, but in two completely different ways. ”

And then the completed product. While it may seem like an easy process, that’s because the Cometic group has experience on their side, which regularly makes complicated tasks look simple.

Sometimes the particular motivation to design a new gasket originates from an external source, as opposed to something discovered by the R& D team. “Some come directly from a customer for an program we currently don’t offer, ” says Hale. “We receive from the sample and go from there using what material they want to use, intake interface sizes, different water flow, and so forth It can be anything sent in from a DXF file or a tracing on a part of paper. ”

Along with such an active R& D section and an immense amount of technologies already in its catalog, it simply leaves one wondering what kind of advancements take the horizon in the world of gasket technologies. “Sometimes you have to look back to go forward. We have been working on silicone beading, which is an earliest pens gasket technology. Still, we are taking a look at using it in applications other than mind gaskets, while also looking at enhancing the silicone’s chemical makeup to get performance and production purposes, ” says Hale.

As long as the market is constantly on the evolve, so will Cometic’s styles. Whether it’s materials, design, or simply applications, the R& D group always has work left to be carried out.

“Another sort of gasket technology revival is in our own “Spring Energized Gasket” head seal line. Many years ago, we had the high-performance line of head gaskets that will featured a gas-filled O-ring. Since time went on, the gas-filled O-ring head gaskets faded, and we stopped the line. The line of SEG mind gaskets feature a spring-energized O-ring — taking inspiration from the gas-filled O-rings of years ago. We always have our own eyes open for improvements within gasket technology, and sometimes, motivation comes in unexpected places. ”

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