- A valve cover gasket, whether it's at the front or rear, serves as a barrier, maintaining the integrity of the engine's oil system. It seals the space where the valves, rocker arms, and pushrods operate, keeping oil from seeping out and contaminants from creeping in. The rear valve cover gasket, specifically, is situated behind the cylinder head, typically in engines with overhead valves or camshafts.
Rotary Wheel Of Auto Parts
Take extra care with a light alloy block or head. It is vital to avoid scratching the machined surface.
Vulcanizates of several fluoroelastomers, listed in Table 14.1, were exposed to a standard 5W-30 engine oil, ASTM Service Fluid 105, for up to 6 weeks at 150°C (302°F).5 The oil was changed weekly, but was not aerated. Retained elongation was measured after exposure for 1, 2, 3, and 6 weeks; data are shown in Fig. 14.3. The results indicate that bisphenol-cured FKM-A500 VDF/HFP copolymer, FKM-B600 VDF/HFP/TFE terpolymer, and peroxide-cured FEPM-7456 TFE/P/VDF terpolymer lost most of their original elongation over the course of the test exposure, indicating considerable additional cross-linking occurred by reaction with amine- and phenol-containing oil additives. The other fluoroelastomers showed better retention of elongation, being much less susceptible to additional crosslinking. Note that FEPM-7456 contains a high level of VDF (about 30%), while FEPM-7506 contains a relatively low VDF level (10–15%) to serve as cure site for bisphenol curing. The other FEPM types contain no VDF.
In conclusion, car engine head gaskets and automotive rubber gaskets are essential components in vehicle systems, contributing to the efficiency, performance, and reliability of automotive systems. Understanding the significance of these gaskets and their proper maintenance and replacement is crucial for optimizing the performance and longevity of the vehicle.
Significance of Oil Seal Wheel Hub in Vehicle Maintenance
Most ERIKS oil seals, such as the types M, MST, R and RST, are made of NBR as standard.

skeleton oil sealing. These foreign particles can cause significant damage to machinery if they enter the system, so it is essential to have a reliable sealing solution in place.
Oil seals come in various shapes to fit the machine or substance for sealing.
For this reason, when designing a machine, it is important to select the oil seal that is right for that machine.
Next time, we will explain the key points to consider when selecting your oil seal.