Before installing the oil seal, it is important to lubricate it to reduce friction and prevent damage during installation. A silicone-based lubricant is recommended for most applications. If the oil seal is to be installed in a high-temperature or high-pressure environment, a more specialized lubricant may be required.
There are several options available when it comes to spark plugs for the MK7 GTI. Some popular choices include NGK, Bosch, and Denso. These brands offer a variety of spark plugs that are specifically designed for performance cars like the MK7 GTI. It's important to do your research and choose the spark plugs that are best suited for your driving style and performance needs.
mk7 gti spark plugs

While Viton offers a superior temperature and chemical range than other materials, it can be more expensive than the others as well. Let’s take a look at an alternative that is easier on the wallet, Polyacrylate.
Please see the following for the types of sealing devices for bearings.
How to Select the Right Bearing (Part 7): Components surrounding the bearing
Proper installation and maintenance of the valve cover gasket are essential to ensure its effectiveness and longevity. Regular inspection and replacement of the gasket when necessary can help prevent oil leaks and maintain the integrity of the engine. Adhering to recommended service intervals and using high-quality replacement components are essential for optimizing the performance and longevity of the engine's valve cover gasket.

Table 6: Selection of metal case and spring materials
Another important factor to consider is the temperature range in which the gasket will be used. Natural rubber gaskets have a broad temperature range, but it is crucial to select a gasket material that can withstand the specific temperature extremes of your application without losing its sealing properties.
Describe difference between mechanical seal and oil seal – Whether it is a mechanical seal or oil seal, it prevents the fluid seeping the liquid to other parts of the machine, or it keeps the rotating parts lubricated.