Cummins engine spare parts Valve spring C5580152 in stocked

Crafted to maintain consistent elastic force under extreme engine operating conditions, this valve spring is made from 51CrV4 chrome-vanadium alloy steel—an industry benchmark for high-performance springs. It delivers a rated elastic force of 850N at 20mm compression, with a spring rate of 42.5N/mm that ensures precise valve movement. The material’s tensile strength reaches 1800MPa, and its fatigue limit is 750MPa, enabling it to withstand 100 million compression cycles (equivalent to 1.2 million km of service) without permanent deformation. Heat treatment (quenching at 860℃ + tempering at 420℃) enhances the spring’s elastic resilience, ensuring it maintains stable performance even at engine speeds up to 2100rpm and under thermal stress from the combustion chamber

Engineered with micron-level precision to ensure seamless valve train operation, the C5580152 valve spring undergoes rigorous manufacturing processes. The wire is cold-drawn with a diameter tolerance of ±0.02mm, and the spring is coiled using CNC winding machines to achieve a pitch tolerance of ±0.1mm—ensuring uniform force distribution during compression. Each spring undergoes individual free length and elastic force testing, with a matching tolerance of ≤5% between paired springs (critical for dual-spring valve systems). The spring’s end faces are ground flat (parallelism ≤0.05mm) to ensure stable seating on the valve retainer, preventing valve tilt and ensuring proper valve seal. This precision ensures the valve opens and closes in perfect synchronization with the camshaft, avoiding valve timing errors that reduce engine efficiency

Designed to endure the harsh internal environment of diesel engines, the valve spring features exceptional high-temperature and corrosion resistance. It maintains elastic stability at continuous operating temperatures up to 350℃ (near the valve seat) and resists thermal fatigue through 500 thermal cycles (-40℃ to 300℃) without performance degradation. The spring’s surface undergoes shot peening (Almen intensity 0.3A) and phosphate coating (8μm thickness), forming a dense protective layer that resists corrosion from engine oil impurities, fuel residues, and moisture. The phosphate coating also improves lubricant retention, reducing friction between the spring and valve guide. These features ensure the spring’s service life matches the engine’s overhaul cycle of ≥300,000km

The C5580152 valve spring integrates a vibration-damping design to enhance valve train stability and reduce noise. Its uniform pitch and optimized coil geometry minimize resonance during high-speed operation, reducing spring vibration by 40% compared to aftermarket alternatives—preventing valve float at high RPMs and ensuring reliable valve closure. Installation is straightforward: the spring fits directly into the original valve spring seat, with the ground end faces ensuring proper orientation. No specialized tools are required beyond standard valve spring compressors, and a qualified technician can replace a set of 12 springs in 3 hours—30% faster than non-OE springs with inconsistent dimensions. Each spring is factory-tested for elastic force, fatigue resistance, and dimensional accuracy, backed by a 2-year/200,000km Cummins official warranty, minimizing the risk of premature failure and long-term maintenance costs