Jegs offers a wide selection of cometic gasket head gaskets, and while each one. Cometic gaskets 2019v1 part number description rrp. I called them and their tech guy said that must be a. Copper head gasket installation instructions do not use cylinder head alignment dowel orings with copper head gaskets 1 check all gasket surfaces for flatness and imperfections. Cometic mls multilayer steel head gaskets provide maximum sealing performance for todays high output engines and require no sealants. Find a huge selection of gaskets by cometic at jegs. I had asked him specifically to follow the cometic instructions. They can withstand the shearing force created by the two materials.
Cometic multilayer steel mls gaskets are designed to provide the best possible seal for naturallyaspirated, boosted, or nitrousfed engines. Mls gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. Cometic gasket an exclusive nascar performance product 5 marine mls head gaskets viton coated embossed outer layer stainless steel shim layer viton coated embossed outer layer 3 layer mls style cross section comprised of multiple embossed layers of both amp advanced multipolymer coating and uncoated stainless steel. Sep 17, 2005 multi layer steel head gaskets mls gaskets are used today on almost all automobile and motorcycle engines and are also available from several after market manufactures such as cometic, felpro, corteco and victor reinz. The mahle performance gasket line is built from the ground up using the latest. For all your racing, custom and performance parts and products.
Cometic gasket supplies hiperformance gaskets for a variety of motorsports markets. Shifter airelectric activated shifter automatic transmission shifter manual transmission shifter cables and rod ends shifter knobs and. Cometic gasket lanciafiat deltatempra 4 cylinder 8. Cometic mls multilayersteel head gaskets are ideal for any combination of head and cylinder materials. Head gaskets individual gaskets chevrolet gm see page 1 for additional gaskets multi layer steel head gaskets mls gaskets are comprised of multiple embossed layers of both viton. On my new engine well be using the mls head gaskets. Before installing the new cylinder heads and gaskets, take a look at the photos you took in step 3 to verify that everything is in the correct location and you have everything required for re.
Mirror finish inner spacer provides overall strength and thickness variations. Two viton coated outer embossed spring steel layers with a steel inner layer that provides support to the gasket. Precision tooling provides optimum bead height, width, profile, and bore concentricity. Atv, drag race, domestic automotive, harleydavidson, mxdirt. Atv, drag race, domestic automotive, harleydavidson, mxdirt, offroad, pwc, road race, snowmobile, sport compact and street. Sealing beads surround the combustion chamber and coolant passages emphasizing clamp load in these specific areas. I had cometic make two copper gaskets for my twin cam aseries. Head gasket torque engine builder help please vtwin forum. Phuzionis comprised of a cometic mls head gasket and multiple garlock helicoflex gas filled orings. Multilayer steel head gaskets are made from thin spring stainless steel sheets. Multi layer steel head gaskets mls gaskets are used today on almost all automobile and motorcycle engines and are also available from several after market. The center row of head studs needs to be longer than with cast iron heads since these trick.
Engine builder told me its important to machine the surface of the block mirror smooth. I would say that if you are using another hg with success, stay away from the mls gaskets. Phuzion is comprised of a cometic mls head gasket and multiple garlock helicoflex. Whether its an mls head gasket that can survive the astronomical boost, a manifold gasket that will seal 20 inches of crankcase vacuum, or a valve cover gasket that will maintain a leakfree seal after miles of fullthrottle action, felpro has the sealing package you need to win. Cometic multilayer steel mls head gaskets go on dry because they are coated with a sealant. Question about mls head gaskets subaru forester owners forum.
Weinberg explained that the use of manual transmissions in racing is. Cometic and felpro give us the inside scoop and dispel a few myths. Check your dowel pins as they register the gasket and head into proper location. Cometic gasket an exclusive nascar performance product. Can i order head gaskets with a different thickness andor. Cometic mls head gaskets v8 engine type free shipping. They all kill head gaskets no matter how well taken care of. Head gaskets individual gaskets chevrolet gm see page 1 for additional gaskets multi layer steel head gaskets mls gaskets are comprised of multiple embossed layers of both viton coated and uncoated stainless steel. Mls head gasket instructions for harleydavidson applications.
Its been awhile since the cometic mls head gaskets have come up in the forum. Felpro uses proprietary head gasket coatings and facing materials designed to fill in minor surface imperfections and allow for improved sealing on imperfect surfaces found in the repair. The cometic mls gasket is comprised of three layers of. Cometic gaskets are the industry standard for championshipwinning teams across multiple disciplines of both professional and amateur motorsports. Cometic and fel pro give us the inside scoop and dispel a few myths. Cometic mls head gaskets are constructed from multiple layers of stainless steel for strength and contain loadcontrolled embossments that conform load distribution across the sealing area. Cometic gaskets phuzion is the next stage in head gasket development. Dec 15, 2017 many modern engines use multilayer steel mls head gaskets that require the block surface to be meticulously prepared to seal correctly. If you are running a high performance engine you probably already know that a multilayer steel mls head gasket is the only type of gasket likely to meet your engines requirements. Adding an additional sealer can hinder the performance of an mls head gasket. You can find more information on this type of gasket here pdf file.
We have used products from both of these companies in the past. The cometic c5726040 mls exhaust manifold gasket for your 1998. The head gaskets are made from 35 layers of spring stainless steel, offering a stronger base material than standard cylinder head gaskets. Cometic uses stainless steel for increased strength, its ability to rebound and corrosion resistance. You cant even think about multilayer stainless steel head gaskets without considering cometic gasket. This creates an exceptional seal by requiring less clamp loadresulting in less bore distortion. Most mls head gaskets are three to five layers depending upon the application. Extreme sealing technology ensure a critical seal and superior durability that meets and exceeds oem specifications gaskets are made from quality materials such as mls multilayer steel, rubbercoated steel and aluminum foam material cometic graphite material is impervious to fuels, coolant and oil maximum seal and f.
Cometic multi layer steel mls head gasket c4530 2 mlx c4611 0. Livernois motorsports recommends cometic mls head gaskets for all performance engine applications. Cometic valve cover gaskets surpass the quality and ability of typical cork or paper gaskets offered by other manufactures. A standard decking like youd do with the felpro gaskets isnt good enough. Over 160 felpro mls performance head gaskets available. They were great to work with and resulting dead soft copper gaskets dialed in the cr at 10.
Any chance these could be a way to avoid oringfirering the heads if used with studs, for people with lower boost engines less then 50psi. Additional sealer is not required with cometic mls head gaskets. If you can buy an mls head gasket for your engine offtheshelf from. Once proper fitment is established, proceed with head installation torque the bolts using the method outlined in the factory service manual. According to cometic gaskets website, the outer layers of their mls gaskets are embossed and coated on both sides with viton a. Here at all head services, we have seen numerous occurrences where the. These gaskets consist of two to five sheets of spring or carbon steel, which are sandwiched together with a sealing material to form the head gaskets. It turns out, even our jaded and sometimes arrogant selves learned a lot of seriously important information. Two viton coated outer embossed spring steel layers.
Embossed and coated outer layers apply sealing pressure to cylinder head and bore apertures, coolant and oil passages. Cometic gasket an exclusive nascar performance product 5 marine mls head gaskets viton coated embossed outer layer stainless steel shim layer viton coated embossed outer layer 3. Additionally, they can reduce the cylinder bore distortion thanks to their superior seal. The outer layers of the gasket are embossed and coated on both sides with a flouroelastomer rubber based material viton. Dealers just arent allowed to put in mls head gaskets, at least not for a warranty job. Mls gaskets are very sensitive to surface finish, and require highquality machining of your block and heads.
First developed and validated in partnership with professional stock car racing teams, the laserweld stopper layer design is now available in felpro permatorque mls multilayer steel head gaskets for a broad range of performance and next gen highoutput engines. Cometic gaskets adds a resilience to mls head gaskets. Head gaskets mls head gaskets mahle performance mls head gaskets are comprised of 3 stainless steel layers. All hardware and mating surfaces should be free from any old sealers, rust, or carbon. Mls head gasket instructions for harleydavidson applications note.
Thats because the head gaskets from cometic gaskets have. Gaskets hiperformance 1 mls multi layer steel the cometic mls gasket is comprised of three layers of stainless steel. Withstands blowing out, over tightening, and high vacuum all at an affordable price. Supra and mitsu owners for years swore up and down to only use the factory gaskets, till slowly they started. Cometic head gaskets head gasket volume calculator round bore only. The gasket mating surfaces must be smooth 50ra or finer. Check all gasket surfaces for flatness and imperfections an excessively rough finish may. Before installing the head, place the head gasket on the cylinder and locate the. Cometic gaskets phuzionis the next stage in head gasket development. Gasket materials the composition of mls will also withstand the shearing forces created by aluminum heads on cast iron blocks.
Mls tm multilayer steel head gaskets ideal for both aluminum heads to cast iron blocks and aluminum heads to aluminum blocks. Ga1712 black diamond coated mls head gasket demand the best. Year 2019 2018 2017 2016 2015 2014 20 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965. Sealing cometic mls head gaskets page 2 don terrills. Mls head gaskets are becoming the norm in engine building.
Mls head gasket surface preparation all head services. Hile great care has been taken to ensure the accuracy of. If you can buy an mls head gasket for your engine offtheshelf from cometic or any other. The list price on the cometic website for a 0 mini mls gasket up to. Cometic differential gaskets are offered for the most popular differentials in the industry. Cometic gaskets reveals its spring energized mls head gasket line. Comprised of mulitple embossed layers of stainless steel with the outer layers utilizing a viton rubber coating.
Before installing the new cylinder heads and gaskets, take a look at the photos you took in step 3 to verify that everything is in the correct location and you have everything required for reassembly. Click for theamcforum rules click for pdf version of forum rules. We contacted two leading gasket companies, cometic and felpro to get the magic sorted. Cometic folds over the edge on the center embossed layer on its mlx. Some custom gasket requests may requir e a sample gasket or dxf cad file. How to prep for cometic head gaskets turbo tech questions.