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Caterpillar Cylinder Head Wholesale | Factory-Grade 3306, C15 & More

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

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Unyielding Thermal Resilience: High-Performance Top-End Caterpillar Cylinder Head for Earthmoving & Construction Machinery

In the grueling environments of earthmoving and power generation, the cylinder head must withstand immense cylinder pressures and thermal shock. Ruich Value’s wholesale inventory resolves critical maintenance shortages, covering popular series including 3306, 3406, C15 and Full Series for mixed industrial fleets. Whether you require a fully assembled “Loaded Head” for a rapid overhaul on a C15 ACERT excavator or a rugged bare casting for a legacy 3306 dozer, our catalog provides the metallurgical density needed to resist cracking between valve seats. Caterpillar engines span decades of technology, from the mechanical 3300 series to the electronic C-Series. Our replacement units are engineered with High-Nickel Alloy Iron to improve thermal conductivity and structural rigidity, directly addressing the OEM propensity for bridge cracking under high load. By offering both Pre-Combustion (PC) and Direct Injection (DI) configurations, we ensure precise compatibility for your specific machine serial number.

Buyer’s Guide: Caterpillar Cylinder Head Configurations

Engine Family Tech Specs Critical Identification
Legacy 3300 Series (3304 / 3306) PC (Pre-Cup) vs DI (Direct Injection) PC Heads have glow plugs and screw-in injectors. DI Heads use pencil-style injectors (8N1187). They are NOT interchangeable.
Heavy Duty C-Series (3406E / C15 / C18) Overhead Cam / Electronic Check casting numbers carefully. C15 ACERT heads differ from single-turbo 3406E heads in terms of exhaust port airflow and valve relief.
Mid-Range Compact (3054 / C4.4 / 3066) Cross-Flow Design Used in backhoes (416E) and small excavators (320C). Verify if the engine is Perkins-based or Mitsubishi-based (3066).

Caterpillar Engine & Equipment Applications

Engine Series Compatible Vehicles & Machinery
3306 / 3304
  • Track-Type Tractors: D6C, D6D, D7G
  • Motor Graders: 12G, 140G, 120G
  • Wheel Loaders: 966C, 950B
C15 / 3406
  • Excavators: 365C, 385C, 390D
  • Articulated Trucks: 740, D400E
  • On-Highway Trucks (Peterbilt/Kenworth)
C9 / C7
  • Excavators: 330D, 336D
  • Track Loaders: 973C
  • Motor Graders: 140H, 12H

Why Source Caterpillar Cylinder Heads from Ruich Value?

  • Reinforced Casting: Our 3306 and C15 heads feature thickened deck surfaces and strengthened internal bridges to prevent the common issue of cracking between valves under high heat.
  • Loaded Assemblies: We supply Complete Cylinder Heads pre-assembled with new valves, springs, retainers, and rotators, significantly reducing machine downtime and assembly labor.
  • Pressure Tested: Every unit undergoes rigorous hot and cold pressure testing to detect casting porosity, ensuring the water jacket is sealed and preventing coolant from entering the oil.
  • Valve Seat Upgrades: We install high-hardness Stellite valve seats to resist recession, particularly critical for engines running on modern Ultra-Low Sulfur Diesel (ULSD).
  • Secure Export Crating: All heads are bolted to wooden pallets or packed in reinforced crates to ensure the precision-milled deck surface remains undamaged during international shipping.

Available Caterpillar Cylinder Head Range

Explore our comprehensive catalog of replacement Engine Heads. We offer both Bare Castings and Loaded Assemblies. If you do not see your specific casting number (e.g., 8N6000 or 1W1669), please contact us.
ModelPart No.TypeRemark
3304PC8N1188PCPre-Combustion. Fits 3304 PC only.
3304DI1N4304DIDirect Injection. Fits 3304 DI only.
3306PC8N1187PCPre-Combustion. Fits 3306 PC only.
3306DI8N6796DIDirect Injection. Corrected from 8N1187.
3406PC110-5097PCPre-Combustion. For early 3406 engines.
3406DI110-5096DIRectangle Port. Fits 3406B / Early C15.
3406C110-5096DIRound Port. Fits late 3406C.
3406E176-9918DISpecific for 3406E. Check casting number.
3408A7N0858PCPre-Combustion. Fits 3408 w/ Glow Plugs.
3408B7W2225DIDirect Injection. Fits 3408B.
3412A7N0848PCPre-Combustion. Fits 3412 w/ Glow Plugs.
3412B7W2243DIDirect Injection. Fits 3412B.
C7219-5843DICommon Rail Fuel System.
C9332-3619DIFits C9. Casting # 3117226.
C12132-3252DIMarine & Truck applications.
C13345-3752DIAcert Technology.
3406E / Late C15110-5096DIFits 3406E & Early C15 (6NZ). Single Turbo.
C15 Acert245-4324DIFits C15 Acert (Twin Turbo) & C18.
C18223-7263DISingle Overhead Cam. Fits C18 & late C15.
3116140-7373DIMechanical Unit Injector (MUI).
D342 (D8K)8N6000PCApplication: D8K Bulldozer.
D342 (D8H)8N6004PCApplication: D8H Bulldozer.
32086I2378DINaturally Aspirated (NA).

Looking for more components? Explore our complete Caterpillar Industrial Diesel Engine Parts Catalog

Technical FAQ: Caterpillar Cylinder Heads

Q1: How do I tell if I need a PC (Pre-Cup) or DI (Direct Injection) 3306 head?

Look at your fuel injectors. If they are screw-in type with glow plugs, you have a PC (Pre-Combustion) head. If they are pencil-type injectors clamped in with a hold-down bolt (and usually no glow plugs), you have a DI (Direct Injection) head. They cannot be mixed.

Q2: Does the Loaded C15 head come with the injector sleeves?

Yes, our Loaded C15 Cylinder Heads come with the stainless steel injector sleeves (cups) already installed and reamed. This is a critical step that requires special tools, so buying a loaded head saves you significant effort.

Q3: Why do 3406E heads crack?

High exhaust temperatures and thermal cycling often cause cracks between the valve seats. Our aftermarket castings use a higher nickel content iron alloy which offers better thermal elasticity than the original casting, reducing the risk of recurrence.

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