2. Unusual Noises If you hear squeaking or grinding noises from the engine, it may indicate that the timing belt or its associated components, like the tensioner or pulleys, are failing.
They are best known for their bright light emission that is far reaching. Their tungsten is encased in a quartz tube filled with xenon gas. They may require more power when turned on but use much less of it to maintain brightness. Moreover, they have a longer lifespan compared to the halogens. They may seem better but they also present some limitations such as being more expensive as far as manufacturing and replacement is concerned. They are not easy to manufacture from their complex design. Their bright light cause a blinding effect to oncoming traffic which is undesirable and can cause dangers on roads.
ERIKS type GV (type C according to DIN) is equivalent to type M, but is a heavy-duty version with a double metal casing. This can be a useful solution with larger diameters in more demanding applications. There is also a version of this type with a dust lip; the GVST (type CS according to DIN).
Valve stem seal

Fit the gasket to the cover, making sure any screw holes line up. If the gasket has tongues, fit them into their cutouts.
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: prevents particles from reaching the sealing lip.

3, the oil seal installation position is small, axial small size, easy processing, and make the machine compact.