ELRING 577.120 Nuts and Bolts

ELRING 577.120 Nuts and Bolts

The ELRING 577.120 is a high‑performance cylinder head bolt kit designed to meet the exacting standards of modern automotive engineering. Crafted from premium alloy steel, each component delivers superior strength, corrosion resistance, and dimensional stability under extreme operating conditions.

Key Features

• Material Excellence: Made from high‑strength alloy steel, heat‑treated to achieve a tensile strength of up to 1,200 MPa. This ensures reliable performance even in high‑temperature and high‑pressure environments.
• Precision Engineering: Each bolt is machined to tight tolerances (±0.02 mm), guaranteeing perfect fitment with cylinder head studs and preventing any play that could lead to leakage or vibration.
• Corrosion Protection: The bolts feature a phosphating coating followed by a high‑temperature resistant paint finish, providing long‑term protection against rust and thermal cycling.
• Torque Specification: Designed for a torque range of 120–140 Nm, the kit includes a calibrated torque wrench guide to ensure consistent tightening across all fasteners.
• Compatibility: The set is engineered to fit a wide array of engines, including those from Nissan, Mitsubishi, Renault, Dacia, and Suzuki. It covers models such as the QR20DE/QR25DE, X‑Trail, Primera, Rogue, and many others.
• Complete Kit: Each package contains all necessary bolts, nuts, washers, and a torque sequence diagram. No additional parts are required for installation.

Applications

The ELRING 577.120 is ideal for both new engine builds and rebuilds where cylinder head integrity is paramount. Its robust construction makes it suitable for:

• High‑performance street engines that demand reliable sealing under elevated temperatures.
• Commercial vehicles operating in harsh environments, such as heavy-duty pickups and vans.
• Aftermarket modifications where OEM parts are unavailable or cost-prohibitive.

Installation Guide

1. Preparation: Clean all mating surfaces thoroughly. Remove any old gasket material and inspect studs for damage.
2. Alignment: Place the cylinder head onto the block, aligning the bolt holes with the studs. Use a torque wrench to pre‑tighten each bolt in the recommended sequence (usually alternating across the head).
3. Tightening Sequence: Follow the provided torque diagram: start at 30 Nm, then increase to 60 Nm, and finally reach the target torque of 120–140 Nm. This progressive tightening ensures even load distribution.
4. Final Check: Verify that all bolts are within tolerance using a calibrated torque wrench. Inspect for any visible gaps or misalignments before closing the head gasket.

Maintenance Tips

• Inspect bolts periodically during routine maintenance to detect any signs of wear or loosening.
• Avoid over‑torquing, which can lead to bolt failure or cylinder head warping.
• Store spare kits in a dry environment to prevent corrosion before use.

Why Choose ELRING 577.120?

The combination of material quality, precision machining, and proven compatibility makes the ELRING 577.120 a trusted choice for mechanics and automotive enthusiasts alike. Its design ensures that the cylinder head remains securely fastened, maintaining engine performance and longevity.

Conclusion

When it comes to critical engine components such as cylinder head bolts, reliability cannot be compromised. The ELRING 577.120 Nuts and Bolts deliver the strength, durability, and precision required for high‑performance engines across a broad spectrum of vehicle models. Whether you are rebuilding an existing engine or building a new one from scratch, this kit provides the confidence that your cylinder head will stay firmly in place under all operating conditions.