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Over time, the factory valve cover hardware on M50, M50TU, M52, M52TU, M54, S50 (US), and S52 engines is subjected to continuous heat cycling, oil vapor, and moisture, causing original cap nuts to oxidize, corrode, or thread-strip during routine maintenance. Our Polished Valve Cover Cap Nut serves as a direct replacement designed to address these common failure points while improving upon overall engine bay aesthetics.
Because maintaining precise gasket compression is critical to preventing oil leaks, these cap nuts and washers are machined directly to OE-style dimensions. This exact fitment allows for direct compatibility with original and replacement valve cover studs (see T#55317643) and ensures the hardware can be torqued precisely to OEM specifications without guesswork. Manufactured to grade 8.8 structural strength standards, the hardware maintains the necessary clamp force required under normal and high-performance engine operating conditions.
To resist corrosion, both the cap nut and washer undergo an electroless nickel plating process during production. Unlike standard zinc coatings that dull or rust over time, electroless nickel provides a uniform layer of corrosion resistance that withstands long-term chemical exposure and extreme temperature swings while giving the hardware a polished, high-end appearance. Each cap nut assembly includes an OE rubber washer seal, ensuring a tight, leak-free barrier that prevents oil from escaping through the mounting studs.
This product was last offered at the strikethrough price on
06-23-2026
This complete kit provides all the gaskets you need for a thorough valve cover service.
Is your BMW M60 or M62 V8 engine leaking oil? You’re not alone. Oil leaks are a common issue, but we’ve got the perfect solution to keep your engine running clean and efficient.
The valve cover gasket is essential for keeping engine oil where it belongs – inside the engine. It ensures that your valve train and lifters are properly lubricated, preventing wear and tear. When this gasket fails, oil leaks out, creating a mess and potentially causing damage as it burns on hot engine components. Keep your engine compartment spotless and your BMW performing at its best with our valve cover gasket kit.