The manufacturing process of FRP rectangular tubes involves pultrusion, a technique that impregnates continuous glass fiber rovings with resin and then pulls them through a heated mold to form the desired shape
In this an auxiliary lip is provided along with the regular sealing lip. The additional dust lip protects the main sealing lip against dust and other fine solid contaminants and therefore this type is recommended for use in polluted environments. To achieve a long lifetime a suitable lubricant between the two sealing lips should be applied.
- In addition to its performance and environmental benefits, the F7TC Spark Plug is also cost-effective. While it may be more expensive than traditional spark plugs initially, the long-term savings in fuel costs and reduced maintenance expenses make it a smart investment for vehicle owners.
In addition to their longevity, iridium spark plugs also provide improved fuel efficiency and overall engine performance. The consistent and powerful spark produced by iridium spark plugs helps to optimize combustion in the engine, leading to better fuel economy and smoother acceleration. This can result in savings at the gas pump and a more enjoyable driving experience for car owners.
iridium spark plugs for car



FPM
Function of hydrodynamic ribs
If there are curved seals, fit these to the engine. Smear sealant on the seal groove, stick the seal in place, and apply a blob of sealant to each end of the seal where it joins the gasket.

Lift off the cloth, making sure no debris falls into the valve gear.
The quality of the rubber or rubber fabric used to make an outer case is the same as the quality of the rubber sealing lip. Fabric reinforced rubber is, as the name suggests, rubber reinforced with a fabric.
Seals are classified by O.D. wall material, lip type, and whether they have a spring or not.
Major oil seals are specified in ISO 6194-1 and JIS B 2402-1.
Table 2 shows the common types of oil seals, while Table 3 shows the features of each type of oil seal.
Table 4 lists the JTEKT oil seal type codes and corresponding ISO and JIS standards.
Like any element of the engine, oil seals are subject to wear. Over time they can lead to possible leaks of lubricating liquid.