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Cummins Cylinder Head Wholesale | Factory-Grade ISX15, 6BT & More

Heavy-Duty Cummins Cylinder Heads: Precision Castings for Industrial Endurance

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Quick Summary: Cummins Cylinder Head

Premium Cummins cylinder heads engineered for ISF, 4BT, 6BT, 6CT, and ISX15 diesel engines. OEM compatibility with high-tensile alloyed cast iron construction for high-torque durability. Fits equipment including Komatsu PC200, Foton Aumark, and GAZelle NEXT. Ready for wholesale export.

Unmatched Cummins Reliability: Precision Combustion Heads for Heavy-Duty Freight & Power Systems

In the combustion chamber of a heavy-duty diesel engine, the cylinder head must withstand immense firing pressures and rapid thermal cycling. Supporting the global supply chain for Cummins Cylinder Heads, Ruich Value’s wholesale inventory resolves critical maintenance shortages, covering popular series including ISX15, 6BT, 6CT, KTA19 and Full Series for mixed fleets. Whether you require a fully assembled “Loaded Head” for a quick turnaround on a Kenworth ISX15 or a cost-effective “Bare Casting” for rebuilding a mechanical 6BT in an industrial excavator, our catalog provides the metallurgical durability needed to prevent cracking between the valve seats. Modern Cummins engines, particularly the ISX and QSX series, operate under extreme heat loads due to EGR systems. Our replacement heads are cast from High-Nickel Iron alloys to improve thermal conductivity and structural rigidity. Featuring hardened Stellite valve seats and precision-machined valve guides, our Complete Cylinder Heads are engineered to resist valve recession and maintain compression, ensuring your equipment delivers peak torque throughout its service life.

Buyer’s Guide: Cummins Cylinder Head Configurations

Engine Family Head Type Critical Identification
ISX15 / QSX15 (Signature 600) DOHC (Dual Cam) vs SOHC (Single Cam) Early ISX (CM870) is Dual Cam. Late ISX (CM2250/2350) is Single Cam. They are NOT interchangeable.
Mid-Range (B/C Series) (6BT, 6CT, ISB) One-Piece Solid Head Check intake valve diameter and injector bore size (7mm vs 9mm tips) for ISB/QSB applications.
Heavy Duty (N14 / KTA) (Big Cam) Individual Heads (Multiple Castings) KTA engines use individual heads per cylinder. N14 uses three heads (2 cylinders each).

Cummins Engine & Equipment Applications

Engine Series Compatible Vehicles & Machinery
ISX15 / QSX15
  • Class 8 Trucks (Peterbilt, Kenworth, Volvo)
  • John Deere 9000 Series Tractors
  • Versatile 4WD Tractors
6BT / 6CT / QSB
  • Dodge Ram 2500/3500 (12V & 24V)
  • Komatsu PC200, PC300 Excavators
  • Case IH Machinery
KTA19 / KTA38
  • Mining Haul Trucks
  • Marine Tugs & Pushers
  • Industrial Power Generators

Why Source Cummins Cylinder Heads from Ruich Value?

  • Leak-Proof Testing: Every cylinder head undergoes both hot and cold pressure testing to detect microscopic casting porosity or cracks, ensuring zero coolant leaks.
  • Loaded Options: We supply Loaded Cylinder Heads pre-assembled with valves, springs, retainers, and collets, saving machine shops hours of assembly labor.
  • Stellite Valve Seats: To combat the low-lubricity of modern Ultra-Low Sulfur Diesel (ULSD), our heads feature hardened Stellite inserts to prevent premature valve recession.
  • Deck Flatness: The gasket surface is CNC milled to an ultra-fine finish, ensuring a perfect seal with Multi-Layer Steel (MLS) head gaskets under high boost pressure.
  • Secure Packaging: All heads are protected with valve cover plates (if applicable) and secured in reinforced wooden crates to prevent damage to the deck surface during sea freight.

Available Cummins Cylinder Head Range

Explore our comprehensive catalog of replacement Engine Heads. We offer both Bare Castings and Complete Loaded Assemblies. If you do not see your specific casting number, please contact us.
ModelModelModelModel
NTA855 (Assm)ISF2.8ISX15/QSX156BTAA
K19 (Assm)ISF3.8 (Assm)ISLe (Assm) 6CT/6CT (Assm)
4B/4BT (Assm)ISDe/QSB/ISB 4.5QSL6L/6LT (Assm)
6B/6BT (Assm)ISDe 6.7 / QSB6.7 (Assm)ISM11QSB3.3/B3.3 (Assm)
ISB6 E3/E3 (Assm)QSB 5.9LISGISL/T375
ISBe 5.9 (Assm)ISC (Assm)

Looking for more components? Explore our complete Cummins Heavy Duty Diesel Engine Parts Catalog

Technical Q&A: Cummins Cylinder Head

Q1: What is the most common physical failure mode for Cummins cylinder heads? What causes it?

A1: Symptom: Fine thermal cracks appearing between the valve seats or coolant consumption in the expansion tank. Diagnosis: This is typically caused by localized heat stress during high-load cycles, especially in engines like the 6CT or ISF3.8 used in heavy construction. Solution: Our replacement heads utilize HT250 alloyed cast iron with reinforced valve bridges to improve thermal conductivity and resist crack initiation.

Q2: What are the critical installation parameters for Cummins cylinder heads?

A2: Technical Detail: It is mandatory to follow the specific multi-stage torque-plus-angle sequence (e.g., 180 degrees final for ISF series) and verify block deck flatness within 0.05mm. Pro-Tip: Always use new Cummins torque-to-yield head bolts; reusing stretched bolts leads to uneven clamping force, which is the primary cause of head gasket blowout and localized warping.

Q3: Why does Cummins cylinder head replacement require specific alloyed materials?

A3: Diagnosis: Standard cast iron can deflect or “sink” under the extreme common-rail injection pressures of modern Cummins engines. Solution: We utilize alloyed cast iron with increased chromium and copper content. This material chemistry ensures the head maintains deck rigidity and seal integrity under high peak cylinder pressures, preventing oil-coolant intermix in equipment like the Komatsu PC300.

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