The BMW 528i xDrive Valve Stem Oil Seal provides a tight seal that prevents engine oil from getting into your cylinders. You can enjoy smooth acceleration without smoke. A hair-thin lubricant film is applied to the guides of the valve by the Valve Stem Oil Seal as it hugs each valve stem. Thus, compression is maintained while wear is limited. This little bit has very solid dependability, a trait that is well-known throughout the BMW family and especially valued in the high-mileage, all-weather capable 528i xDrive. A steel spring clamps a heat-resistant rubber sleeve that will allow the Valve Stem Oil Seal to cope with rising twin-cam temperatures for years before fatigue sets in. The Valve Stem Oil Seal ensures that the 528i xDrive engine burns its fuel efficiently, resulting in higher efficiencies and protecting catalytic converters. The clear exhaust also aids safety, as trailing traffic can see the car better. Additionally, the oxygen sensors are kept uncontaminated, which allows the computer of the 528i xDrive to command precise fuel delivery during sudden maneuvers. Compatibility is wide; the same Valve Stem Oil Seal fits early 528i xDrive and later facelifts, enabling owners to use a single proven solution. Every single Valve Stem Oil Seal comes with factory specifications that snap in place and restore the unmistakable BMW idle as well as that punchy surge that makes the 528i xDrive feel lighter than it is. According to road tests, BMW drivers have been experiencing fewer top-end leaks after a new Valve Stem Oil Seal has been put in. Such evidence confirms that the Valve Stem Oil Seal is more than just a gasket. This smart safeguard keeps every BMW powerplant breathing clean for a long time to come.
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