The sealing lip is always made of a rubber or synthetic material. For oil seals with a rubber outer case (R, RST, GR, GRST), the rubber quality of the sealing lip and the outer case are the same.
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- The spark plug coil works in conjunction with the spark plugs to ensure that the engine runs smoothly and efficiently. When the engine is started, the coil receives a signal from the vehicle's computer to begin the ignition process. The coil then generates a high voltage pulse that is sent to the spark plugs, causing a spark to jump across the spark plug gap.
- In addition to preventing oil leaks, the C15 valve cover gasket also plays a role in maintaining the engine's performance. A faulty gasket can cause a loss of compression, which can reduce the engine's power and efficiency. This is because the gasket helps to create a tight seal between the valve cover and the engine block, which is essential for maintaining the correct pressure within the engine.
Features Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.