Original Cummins engine auto parts Valve repair kit C5585446

Built as a complete valve system repair package, this kit integrates 28 high-quality components to cover all critical repair needs. The core parts include 4 intake valves, 4 exhaust valves, 8 valve springs (inner and outer), 8 valve retainers, 4 valve guides, 4 valve seats, and a set of valve stem seals (HNBR material). It also includes auxiliary tools: valve spring compressors, valve seat cutters, and anti-seize lubricant—eliminating the need to purchase separate parts. This all-in-one design reduces repair setup time by 60% compared to sourcing individual components, allowing technicians to complete a full valve system overhaul in 8 hours for ISB6.7 engines

Each component in the kit uses Cummins-approved premium materials to ensure long-term reliability. Intake valves are made of 42CrMo alloy steel (tensile strength 900MPa), while exhaust valves adopt Inconel 751 superalloy to withstand 850℃ exhaust temperatures. Valve seats feature stellite alloy overlay (Co-Cr-W) for wear resistance, and valve guides are crafted from sintered bronze (Cu-Sn-Zn) with self-lubricating properties. Valve springs use chrome-vanadium steel (Cr-V) with shot peening treatment, ensuring fatigue resistance for 100 million cycles. These materials match the original engine components, restoring valve system durability and extending service life to ≥250,000km

All parts in the kit undergo ultra-precision machining to guarantee valve system performance. Valves feature ground sealing faces (Ra ≤0.2μm) and polished stems (Ra ≤0.1μm), ensuring leak-tight contact with seats (leakage rate ≤0.3L/min) and smooth movement in guides. Valve seats are CNC-machined to 30° angles and 0.01mm flatness, matching the valve’s sealing profile perfectly. Valve retainers and locks have precise dimensional accuracy, ensuring uniform spring tension (±5N) and preventing valve float at high engine speeds (2800rpm). This precision restores the engine’s compression ratio (17:1) and valve timing accuracy, improving combustion efficiency by 8% and reducing fuel consumption by 3-4%

The repair kit is designed for cost savings and ease of use. By providing OE-matched components, it eliminates the risk of mismatched parts that cause premature failure (e.g., valve guide wear leading to oil consumption). The included auxiliary tools reduce reliance on specialized equipment, cutting repair labor costs by 40%. Clear labeling and a detailed instruction manual (with torque specifications and installation steps) simplify the repair process, even for novice technicians. Compared to replacing the entire cylinder head (costing up to $5,000), this kit offers a 70% cost reduction while restoring valve system performance. Backed by a 1-year warranty, it minimizes unplanned downtime for fleet operators and ensures reliable engine operation