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

Product Details

Product Overview

This premium aftermarket cylinder head is engineered specifically for the Caterpillar S6K 320B diesel engine, a powerplant commonly found in heavy construction and material handling equipment. Designed as a direct replacement for the original equipment component, this cylinder head carries the critical OEM cross-reference numbers 5I-8051 and 34301-01060.

Manufactured to strict OEM dimensional standards, this cylinder head provides a reliable solution for maintaining or restoring compression and combustion efficiency in Caterpillar machinery. It is a critical top-end engine component that forms the upper seal of the combustion chamber, housing the valves, injectors, and associated hardware to ensure proper engine operation.

This component is commonly specified for use in excavators, forklifts, loaders, bulldozers, trucks, and buses powered by the S6K 320B engine, offering a robust solution for equipment owners and fleet managers seeking a cost-effective yet reliable replacement part.

Key Features & Benefits

• OEM Specification Fitment: Manufactured to match the exact dimensions and material specifications of the original Caterpillar cylinder head, ensuring a precise bolt-on installation without modifications.
• Critical Engine Component: As a core part of the top-end assembly, this cylinder head is essential for maintaining proper compression ratios, preventing coolant and oil leaks, and ensuring efficient combustion.
• Enhanced Durability: Constructed from high-grade cast iron or aluminum alloy (as per OEM spec) to withstand the extreme thermal and mechanical stresses of diesel engine operation.
• Complete Ready-to-Install Design: Delivered as a bare cylinder head, ready for the transfer of existing valve train components from the original head, simplifying the rebuilding process.
• Rigorous Quality Control: Subject to stringent inspection procedures, including pressure testing for cracks and porosity, as well as dimensional checks on critical sealing surfaces.
• Cost-Effective Solution: Provides a high-quality alternative to expensive OEM parts without sacrificing performance or reliability, offering significant savings for maintenance and repair budgets.
• Comprehensive Warranty Protection: Backed by a 6-month warranty against manufacturing defects, providing peace of mind for your investment.

Technical Specifications

OEM Cross-Reference

This cylinder head is a direct aftermarket replacement for the following original equipment part numbers. Please verify your existing part number before ordering.

• Caterpillar OEM: 5I-8051
• Isuzu / Other OEM: 34301-01060

Note: While these cross-references are accurate based on industry standards, it is always recommended to physically compare the part with the original to confirm compatibility.

Compatibility

This cylinder head is specifically designed for use in the Caterpillar S6K 320B diesel engine. Based on this engine application, it is commonly used for the following machinery types:

• Excavators
• Forklifts
• Wheel Loaders
• Bulldozers
• Trucks & Buses
• Other heavy equipment utilizing the S6K 320B engine

Important Fitment Note: Compatibility is determined by the specific engine model. While this part is designed for the S6K 320B, please confirm your equipment’s engine configuration (e.g., serial number prefix) to ensure a perfect match.

Global Supply & Distribution

As a leading supplier of heavy-duty engine components, maintains a robust global distribution network to serve international B2B buyers efficiently.

• Worldwide Shipping: We offer reliable shipping solutions to all major global markets, including North America, South America, Europe, Southeast Asia, the Middle East, Africa, and Oceania.
• Major Ports & Hubs: Our logistics partners ensure fast and cost-effective delivery to major ports and industrial centers such as Los Angeles, Houston, Rotterdam, Dubai, Singapore, and Shanghai.
• Export Experience: With years of experience in international trade, we are well-versed in export documentation, customs clearance, and compliance with international shipping standards.
• Flexible Quantities: We cater to a wide range of order volumes, from single-unit replacements for fleet maintenance to bulk orders for dealerships and rebuild centers.

Quality Assurance

At, product reliability is paramount. Every cylinder head undergoes a strict quality control process to ensure it meets or exceeds the performance of the original part.

• Manufacturing Standards: Produced in ISO-certified facilities that adhere to strict quality management systems.
• Testing Procedures: Each unit is subjected to pressure testing to detect micro-fractures and porosity, ensuring structural integrity under high compression.
• Dimensional Accuracy: Critical sealing surfaces, valve guide bores, and bolt holes are inspected to guarantee a precise fit with the engine block and cylinder head gasket.
• Warranty: This product is covered by a comprehensive 6-month warranty against defects in material and workmanship, providing assurance for your maintenance operations.

FAQ

Q: Will this cylinder head fit my Caterpillar 320B excavator?
A: This cylinder head is designed for the S6K 320B engine, which powers various models including certain 320B series excavators. However, engine configurations can vary by serial number and year. We strongly recommend verifying your engine’s serial number and comparing the existing cylinder head’s part number (5I-8051 or 34301-01060) before purchasing to ensure a perfect fit.

Q: Does this cylinder head come with valves, springs, and other internal components pre-installed?
A: No, this cylinder head is supplied as a “bare” head. It does not include the valve train components (valves, springs, seals, retainers, or camshafts). You will need to transfer these components from your original cylinder head or purchase them separately as a rebuild kit. This is standard practice for aftermarket cylinder heads.

Q: What is the recommended procedure before installing this new cylinder head?
A: Before installation, we recommend the following: 1) Ensure the engine block deck surface is clean and perfectly flat. 2) Transfer all valve train components from the old head, using new valve stem seals. 3) Always install a new, high-quality cylinder head gasket and new cylinder head bolts (as these are often torque-to-yield). 4) Follow the manufacturer’s specified torque sequence and tightening procedure for the S6K 320B engine to ensure proper sealing and prevent warpage.