Infiniti Q45's Valve Stem Seal prevents excessive oil from getting into the combustion chambers for smooth power delivery and clean exhaust. This tiny Valve Stem Seal is located at each valve stem and aluminum head interface to allow a solid seal to take place while allowing the stem to slide as the camshaft strokes as the Q45 engine freely breathes up and down the rpm range. The Valve Stem Seal not only inhibits stray oil but also prevents the formation of carbon on valve faces, which preserves sharp compression. According to many Infiniti owners, this is partly why the model has such lively throttle response and proven reliability. All three generations of the flagship Infiniti sedan use the same rubber-lip concept. A fresh Valve Stem Seal for a first-year classic fits as surely in the late-run sedans throughout the Q45 lineup with only minor dimension tweaks for drop-in fitting. Many Infiniti loyalists believe the long life of the motor in their sedan is due to a properly sized Valve Stem Seal that reduces oil consumption, plug fouling, and hot-oil induced valve float, which gains translate to better efficiency and safer passes at speed. The Valve Stem Seal contains a heat resistant rubber compound in the body of the part. Meanwhile, the spring-loaded sealing lip helps to maintain gripping power after years of severe heat cycles. The unique Q45 luxury V8 application stands out from the crowd of other parts offerings. This also helps protect the wider Infiniti legacy. Through your daily commuting in a Q45, preserving an original showroom example, or experiencing spirited weekend drives, a healthy Valve Stem Seal helps drivers trust this unseen hero to maintain the smooth, confident character defining Infiniti performance and keeping every mile of Q45 remarkably clean.
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