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Replacing a crankshaft front oil seal
Replacing a cylinder-head gasket
Standard springs are made of carbon steel. We use stainless-steel springs for our GR and GRST oil seals made from FKM rubber. In some rare cases, an O-ring is even used as a spring element. Standard PTFE lip seals are not fitted with springs.
In conclusion, choosing the right spark plugs for your MK7 GTI is crucial for optimal performance and engine efficiency. Upgrading to high-quality spark plugs can improve throttle response, fuel efficiency, and overall engine performance. Brands like NGK, Bosch, and Denso offer a variety of spark plugs that are specifically designed for performance cars like the MK7 GTI. When choosing spark plugs, consider factors like heat range and electrode material to ensure you're getting the best performance out of your MK7 GTI.