34207-05035 34307-01010 Cylinder Block for E320C E320D E320CL E312 S6K S4K 3066 Diesel Engine

The 34207-05035 / 34307-01010 Cylinder Block is a heavy-duty diesel engine component designed for compatible E320C, E320D, E320CL, E312, S6K, S4K, and 3066 engine applications.

Built with durable cast construction and precision-machined cylinder bores, this engine block is suitable for excavator engine rebuilding, overhaul, repair, and replacement projects. It provides a strong structural foundation for the pistons, crankshaft, cylinder head, and other key internal engine components.

Product Information

• Product Name: Diesel Engine Cylinder Block
• Part Number: 34207-05035
• Alternative Part Number: 34307-01010
• Compatible Models: E320C / E320D / E320CL / E312
• Engine Models: S6K / S4K / 3066
• Application: Excavator / Construction Machinery
• Category: Diesel Engine Parts
• Condition: New
• Material: Heavy-Duty Cast Metal
• Replacement Type: Direct Replacement

Key Features

Heavy-Duty Cast Construction
Manufactured from durable cast material to withstand engine vibration, mechanical stress, heat, and demanding working conditions.

Precision-Machined Cylinder Bores
Accurately machined cylinder surfaces help support smooth piston movement, proper compression, and stable diesel engine performance.

Accurate Mounting Surfaces
Machined deck surfaces, bolt holes, oil passages, and coolant passages are designed for correct installation with compatible engine components.

Reliable Structural Strength
The cylinder block provides strong support for the crankshaft, pistons, connecting rods, cylinder head, and other internal engine assemblies.

Durable for Heavy Equipment Applications
Designed for excavators and construction machinery operating in demanding job-site environments.

Compatible Excavator Models

This cylinder block is suitable for compatible applications including:

• E320C
• E320D
• E320CL
• E312

Compatible Engine Models

Suitable for compatible diesel engines including:

• S6K
• S4K
• 3066

Compatibility can vary depending on machine configuration, engine serial number, and production year. Please confirm the part number, engine model, and cylinder block dimensions before ordering.

Product Advantages

• Replacement for 34207-05035
• Replacement for 34307-01010
• Heavy-duty cast structure
• Precision-machined cylinder bores
• Accurate gasket mating surfaces
• Reliable oil and coolant passages
• Suitable for engine rebuilding
• Designed for long-term heavy-duty operation
• Ideal for excavator engine overhaul and maintenance

Engine Rebuilding Application

The cylinder block is one of the main structural components of a diesel engine. It houses the cylinder bores and provides mounting locations for many critical engine components.

A damaged or excessively worn cylinder block can result in:

• Low engine compression
• Excessive oil consumption
• Coolant leakage
• Engine overheating
• Abnormal vibration
• Cylinder wall scoring
• Reduced engine performance
• Internal engine damage

Replacing a severely worn or damaged cylinder block can help restore proper engine geometry and support reliable operation after rebuilding.

Quality Inspection

Each cylinder block is inspected before shipment to help ensure:

• Correct overall dimensions
• Accurate cylinder bore machining
• Flat deck surface
• Proper mounting hole positions
• Clean oil passages
• Clear coolant passages
• Consistent casting quality
• Reliable mating surfaces

Installation Recommendation

Professional engine assembly is recommended.

Before installation, inspect all related engine components, including:

• Pistons
• Piston Rings
• Connecting Rods
• Crankshaft
• Main Bearings
• Cylinder Head
• Head Gasket
• Oil Pump
• Cooling System Components

All mating surfaces should be cleaned carefully, and correct engine assembly procedures, clearances, lubrication, and bolt torque specifications should be followed.

Compatibility Notice

Before ordering, please confirm:

Part Number: 34207-05035 / 34307-01010
Machine Model: E320C / E320D / E320CL / E312
Engine Model: S6K / S4K / 3066

For more accurate compatibility checking, please provide your machine model, engine model, engine serial number, and old part photos.

Packaging & Shipping

The 34207-05035 / 34307-01010 Cylinder Block is securely packed with protective materials to help prevent impact, moisture, and surface damage during transportation.

International shipping is available for excavator parts, diesel engine parts, and construction machinery spare parts.

Request a Quote

Looking for a 34207-05035 / 34307-01010 Cylinder Block for E320C, E320D, E320CL, E312, S6K, S4K, or 3066 Engine?

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Part Number + Machine Model + Engine Model + Quantity

We can help confirm compatibility, availability, pricing, and shipping options.