Cylinder Head for Caterpillar S6K 320B Engine 5I-8051 34301-01060 Excavator

Product Details

Product Overview

This premium aftermarket cylinder head is specifically engineered for the Caterpillar S6K 320B diesel engine, commonly used in heavy machinery such as excavators, loaders, bulldozers, and forklifts. Designed to meet OEM specifications, this component ensures reliable combustion chamber sealing and optimal airflow for demanding industrial applications.

The cylinder head (OEM reference 5I-8051 / 34301-01060) is a critical engine component that houses the valves, fuel injectors, and cooling passages. Our replacement offers a direct fit for the S6K 320B power unit, providing a cost-effective alternative to genuine Caterpillar parts without compromising on performance or durability.

Each unit is manufactured using high-grade cast iron with precision-machined surfaces to guarantee proper sealing and long service life. This product is suitable for both repair and rebuild projects on Caterpillar 320B series excavators and other equipment powered by the S6K diesel engine.

Key Features & Benefits

• OEM Specification Fitment: Manufactured to original dimensions (OEM size) for direct replacement of part numbers 5I-8051 and 34301-01060.
• High-Strength Material: Constructed from durable cast iron alloy to withstand high compression pressures and thermal cycling in diesel engines.
• Precision Machining: Valve seats, guide bores, and deck surfaces are machined to tight tolerances for optimal sealing and valve train geometry.
• Complete Unit: Ready-to-install cylinder head (valves and springs not included, unless specified). Core charge may apply for exchange programs.
• Cost-Effective Solution: Significant savings compared to genuine Caterpillar parts while maintaining reliable performance for industrial machinery.
• Warranty Protection: Backed by a 6-month warranty against manufacturing defects, providing peace of mind for your investment.
• OEM Service Available: Custom branding or packaging options available for volume orders or distributor partnerships.

Technical Specifications

OEM Cross-Reference

This cylinder head replaces the following original equipment manufacturer (OEM) part numbers:

• Caterpillar: 5I-8051
• Komatsu / Isuzu: 34301-01060
• Alternative Reference: 5I8051, 3430101060

Note: Always verify your engine serial number and cylinder head casting number to ensure correct fitment. Cross-references are provided for reference only.

Compatibility

This cylinder head is designed for the Caterpillar S6K 320B diesel engine. It is commonly used in the following machinery applications:

• Excavators: Caterpillar 320B, 320B L, 320B N
• Loaders: Caterpillar 950B, 960F (with S6K engine)
• Bulldozers: Caterpillar D3C, D4C (specific variants)
• Forklifts: Various models using S6K power unit
• Trucks/Buses: Certain medium-duty applications

Fitment is inferred based on engine model. Please verify compatibility with your specific equipment serial number before purchase.

Global Supply & Distribution

We offer worldwide shipping from our warehouse in Guangdong, China, with reliable logistics partners ensuring fast delivery to major industrial centers. Our distribution network covers:

• North America: Los Angeles, Houston, Chicago, Toronto, Vancouver
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe
• Asia-Pacific: Singapore, Sydney, Tokyo, Shanghai, Dubai
• Middle East & Africa: Jebel Ali, Durban, Lagos, Jeddah
• South America: Santos, Buenos Aires, Callao

We have extensive experience exporting heavy equipment components and comply with international trade regulations. Volume discounts and custom logistics solutions are available for B2B partners.

Quality Assurance

Our manufacturing process adheres to strict quality control standards:

• Material Certification: All castings are tested for material composition and hardness.
• Dimensional Accuracy: Critical surfaces are machined to OEM tolerances (±0.05mm).
• Pressure Testing: Each cylinder head is leak-tested to ensure cooling and oil passages are sound.
• Visual Inspection: 100% inspection for casting defects, cracks, and surface finish.
• Certification: Products comply with ISO 9001 quality management principles (factory-level).
• Warranty: 6-month warranty against manufacturing defects covering replacement or repair.

FAQ

Q1: Will this cylinder head fit my Caterpillar 320B excavator?

This cylinder head is designed for the S6K 320B engine, which powers the Caterpillar 320B series excavators. However, engine configurations may vary by serial number prefix and production year. We strongly recommend comparing your existing cylinder head casting number or part number (5I-8051 / 34301-01060) with the specifications listed. If you are unsure, please provide your machine serial number for cross-verification.

Q2: Does this cylinder head come with valves, guides, and seals installed?

This product is typically supplied as a bare cylinder head casting (without valves, springs, or seals) unless otherwise specified in the listing. It includes the head gasket surface machined and ready for assembly. You will need to transfer your existing valve train components or purchase a full gasket and valve kit separately. Please confirm the exact contents of the package with your sales representative before ordering.

Q3: What maintenance steps should be taken when installing a new cylinder head?

Before installation, ensure the engine block deck surface is clean and flat. Use a new head gasket and tighten the cylinder head bolts to the manufacturer’s specified torque sequence and values (typically 120-140 Nm for S6K engines, plus an angle tightening step). Always replace oil and coolant after head installation. We recommend checking valve clearance after the engine has reached operating temperature and re-torquing the head bolts after the first thermal cycle (approximately 100 hours of operation).