- In conclusion, while iridium spark plugs carry a higher price tag than traditional models, their increased longevity, performance enhancements, and potential fuel savings offer a compelling value proposition. As with any automotive part, the decision to invest in iridium spark plugs should be based on individual needs, driving habits, and the specific requirements of one's vehicle. For those who prioritize peak engine performance and seek a long-term, cost-effective solution, iridium spark plugs are undeniably worth considering despite their elevated price point.
If you’re committed to preserving your vehicle for the long run, stick to regularly scheduled preventative maintenance services, especially oil changes with high mileage oil.

Sealing principle: Since there is an oil film controlled by the oil seal edge between the oil seal and the shaft, the oil film has fluid lubrication characteristics.


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OIL SEALS
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.

Furthermore, neoprene foam gaskets offer superior insulation properties
. The foam material has a low thermal conductivity, which helps to reduce heat transfer and maintain temperature control in applications where thermal insulation is critical. This makes neoprene foam gaskets suitable for use in HVAC systems, refrigeration units, and other applications where thermal management is essential.neoprene foam gasket

The depth of the bonded seal can be less and the space between the bore and the outside diameter can be changed for ease of fitting. The bonding of rubber to metal is an important factor to be considered in the manufacture of such seals and should be considered carefully, since failure of the bond will cause the seal to fail. The metal case of the oil seal is usually made from mild steel of deep drawing quality which enables blanking, punching, stamping of the steel to the required dimensions.
ERIKS
Rotary shaft or oil seals are placed between moving and stationary pieces of machinery to ensure that contaminants, moisture, corrosive materials and abrasives do not damage the various components. They can also prevent unwanted mixing of fluids, including water and oil combining within a machine.
On engines that rotate anti clockwise (viewed from the front) the pulley bolt unscrews clockwise.