3mm Super Seal Apex Seals. Note : For use in Mazda RX-7 12A Rotary Engines from 1979-85. These seals are a drop in replacement for stock Mazda seals used on the 79-85 12A engines. These seals offer 700% more bending strength and are 85% harder than other aftermarket competitors. The seals do not come with springs.
The Super Seals are made from the same base material as the Classic apex seals but they are then put through an extra process to make the seals even more resistant to high heat conditions which gives them a distinctive black color. When pushed hard enough, the typical failure mode of these seals is that they'sag' in the center when the critical annealing temperature of the metal is reached.
The result is a loss of compression and subsequently power, but the seal remains intact and does not damage the rotor housing or rotors. The difference in the Super Seals is that the extra processing raises the annealing temperature about 80%.These seals are harder than stock Mazda seals which prevents the seals from fracturing under high heat/horsepower conditions. This increased hardness in the seals, under some circumstances, will increase the wear rate on the housings slightly higher than with OEM seals. All aftermarket seals can result in chatter marks or galling on the rotor housings under some specific conditions. This is a conditional problem, and may be caused by high oil temperature and/or low oil in the combustion chamber, and is not specific to seals made by anyone. About : East Coast Rotary has built engines for cars, airplanes, industrial applications, and even race boats. Their custom designed in-house built apex seals are well known, and have been used, throughout the rotary community for years and are perfect for any normally aspirated or boosted street or track car. Defective seals will be replaced. We do not claim that our seals will not break or warp, even the best made ceramic and steel apex seal can be damaged if pushed hard enough or installed in worn or improperly machined rotors, but we have never had anyone report a problem. The item "East Coast Rotary 3mm Super Seal Apex Seals RX-7 79-85 12A Rotary Engine Mazda" is in sale since Wednesday, November 1, 2017. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Engine Rebuilding Kits".
The seller is "unclegoofball" and is located in Benson, North Carolina. This item can be shipped worldwide.