ISX15 SET:

---Valve guide oem: 4026657

---Intake valve seat oem: 3104445 / 3681071 / 4059215

---Exhaust valve seat oem: 3679537 / 3679659 / 3683349

Engineered to exact Cummins specifications, these OEM-grade valve seats deliver uncompromising durability and sealing performance for ISX15 engines in the most demanding over-the-road and vocational applications. The comprehensive part number range ensures perfect compatibility across various ISX15 configurations and model years.

Advanced Material Technology:

The valve seats utilize specialized alloy compositions tailored for their specific locations in the combustion chamber. High-nickel chromium exhaust seat formulations withstand continuous 900°C (1652°F) temperatures while resisting thermal fatigue, while copper-enhanced intake seats optimize heat transfer to maintain stable valve clearances.

Performance Advantages:

1. Extended Service Life – Proprietary alloy blends demonstrate 40-50% greater wear resistance than conventional materials, particularly valuable in high-mileage trucking applications.

2. Precision Thermal Management – The optimized material combinations provide:

   • Superior heat dissipation from critical valve areas

   • Reduced hot spotting in the combustion chamber

   • More consistent valve lash settings

3. Engineered Sealing Surfaces – CNC-machined to 0.4-0.6μm Ra surface finish ensures:

   • Complete 360° valve contact

   • Maintained compression ratios

   • Minimized blow-by across all operating conditions

Technical Specifications:

• Hardness: 45-55 HRC (application specific)

• Temperature Range: -40°C to 950°C

• Concentricity: 99.5% minimum

• Surface Finish: Precision ground to 0.4-0.6μm Ra

Critical Applications:

• Long-haul trucking operations

• Heavy-duty vocational vehicles

• Fire and emergency apparatus

• Refrigerated transport

• Specialized haulage applications

Verified Performance Benefits:
Field data confirms:
• 35-45% longer valve service intervals
• 5-7% improved fuel efficiency
• Reduced cylinder head temperatures
• Lower total cost of ownership

These Cummins ISX15 valve seats provide OEM-quality solutions for engine rebuilds and performance upgrades. Available in complete sets with all required configurations, they deliver the precise fit and durability demanded by today's heavy-duty diesel applications. The comprehensive part number coverage ensures correct selection for all ISX15 engine variants and model years.

With over 30 years of expertise in automotive parts export, we specialize in manufacturing high-precision, high-performance components for global markets. Our products meet stringent quality standards and are trusted by clients worldwide.

• Equipped with advanced testing machinery for material analysis and heat treatment verification.
• Dedicated engineering and QC teams ensure every product meets your exact specifications and performance requirements.

• Custom solutions available based on your samples or technical drawings.
• Trial orders (small quantities accepted) to facilitate smooth collaboration and build long-term partnerships.