- Now, insert the new spark plugs, being careful to apply a light coat of anti-seize compound on the threads to prevent sticking in the future. Tighten them gently, then use the torque wrench to reach the recommended torque specification. Reconnect the spark plug wires, ensuring they're properly seated and in the correct order.
3. TEMPERATURE: Similar to the pressure level, you need to know what temperature your machinery can operate at. You need to choose a seal that can withstand the heat or cold. PTFE have the widest rang of temperature, making them a safe option when you are uncertain of the range.
-20 °C to + 130 °C

f7rtc spark plug. With proper maintenance and care, this spark plug will keep your engine running smoothly for years to come.
No code: without minor lip
Beyond the variety of lip designs, oil seals also come in various case designs, each serving a unique role. Here are some of the most common ones:
A typical oil seal consists of three common parts: an outer ring, the sealing element, and a spring. The exterior metal ring component provides strength and rigidity to the oil seal in the bore or recessed groove. Attached to that ring is the sealing element. This flexible interior component of the oil seal, the O-ring, prevents any fluid leaks between the shaft and housing. A spring ensures the constant pressure that deforms the O-ring, creating a reliable seal while maintaining radial force on the shaft.
What are oil seals?
ERIKS
Prepare the shaft and prevent damage
ERIKS type R (type A according to the DIN standard) is identical in shape to type M, but has a rubber outer case with metal reinforcement on the inside. The rubber creates a good seal in the housing, even if the housing has suffered minor damage or is not in its best condition for other reasons. The RST version has a dust lip. These types are often chosen to replace a type with a metal outer case because they are easier to install and can cope with minor damage to the groove, such as scratches.