Furthermore, the use of M8 bolts in double-ended studs can also improve the durability of vehicles
- A spark plug is a simple device, typically made of a central electrode surrounded by a metal shell, with an insulator in between. The central electrode is connected to high voltage electricity from the ignition system, while the shell is grounded to the engine block. When the voltage jumps the gap between the electrodes, it creates a spark, igniting the compressed fuel-air mixture within the cylinder, thus initiating the power stroke.
PTFE Lip seals



If the seal is being fitted to original equipment you may have some influence over the shaft and housing bore finish, but if you are replacing a worn seal you still need to take into account the condition of these 2 essential parts.

valve oil seal. Excessive oil in the combustion chamber can lead to fouled spark plugs, increased emissions, and reduced engine performance. By controlling the flow of oil into the combustion chamber, valve oil seals help to maintain optimal engine function.
Most conventional oil seals are designed only to withstand very low-pressure applications (about 8 psi or less). If additional internal pressure is present or anticipated, pressure relief is necessary.
Oil seals with outer metal cases may include finishes or treatments applied to the outer edge to aid in rust protection, identification, and sealing of scratches or imperfections in the housing bore. Common finishes applied to the outside edge of metal O.D. oil seals include plain (a bonding agent of usually a yellowish-green color), a color-painted edge, and a grinded-polished edge.
The oil seals represent the most important type of dynamic sealing on rotating shafts. During the last years, we witnessed a great evolution in the technology, starting from their shape to the materials used nowadays.
