- The 2.0% TDi Valve Cover Gasket A Crucial Component for Optimal Engine Performance
A standard oil seal consists of an outer circular metal disk with an inner flexible rubber which is affixed to the metal during vulcanization. The bonded seal has no loose parts to allow leakage of oil or ingress of any contaminants. This kind of seal is more accurate, and can easily be fitted into a smaller space. An example is shown in Figure 2.9.
- One of the main considerations when replacing spark plugs is the cost. The cost of new spark plugs can vary depending on the type and brand you choose. On average, a set of four spark plugs can cost anywhere from $20 to $100. It's important to keep in mind that the cost of labor for installation may also need to be factored in if you're not comfortable replacing the spark plugs yourself.
Like any element of the engine, oil seals are subject to wear. Over time they can lead to possible leaks of lubricating liquid.
Apply gasket sealant to the engine flange and refit the cover. Tighten the fixings but do not overtighten them.


Type A Oil Seals
The most common oil seals are the ERIKS types R, RST, M and MST, which correspond respectively to types A, AS, B and BS according to DIN 3760/ISO 6194.
ERIKS also supplies the types GR and GRST. These are virtually identical to the types R and RST, except in this case the metal inner ring is also completely encased in rubber. ERIKS uses FKM rubber here as standard, so these seals are ideal for use in acidic environments.