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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
07-14-2026
This product was last offered at the strikethrough price on
07-14-2026
A cracked valve cover is often the culprit behind engine oil leaks, as prolonged exposure to extreme temperature fluctuations deteriorates the gaskets, leading to failure. Ensure your engine oil stays where it belongs by replacing your valve cover.
This comprehensive valve cover kit includes all necessary gaskets and hardware for a seamless, hassle-free installation.
Key Benefits:
Perfect Fit: Designed to match OE specifications for a straightforward installation and optimal valvetrain protection. Prevent Leaks: Cracked valve covers can cause problematic vacuum leaks and allow oil to damage engine components. Premium Quality: Made from high-grade metal or plastic materials, this valve cover is corrosion-resistant and can withstand intense engine heat and oil vapor. URO Parts Excellence: With a catalog of over 8,000 premium spare parts, URO Parts specializes in high-precision, durable replacements for factory BMW components. Each part is meticulously evaluated to ensure the perfect balance of durability, functionality, and cost. For top-quality replacement parts that won't break the bank, trust URO Parts.
This product was last offered at the strikethrough price on
05-15-2026
This product was last offered at the strikethrough price on
05-15-2026
This product was last offered at the strikethrough price on
05-15-2026
This product was last offered at the strikethrough price on
05-15-2026
