CAT 348-9904 Cylinder Block For C27 & C32 Engines

Description

The CAT 348-9904 cylinder block is a core engine component engineered for heavy duty Caterpillar engines, especially the CAT C27 engine and CAT C32 engine. This cylinder block provides the essential structure for sustained and reliable power in demanding industrial and construction environments.

Key Specifications & Compatibility

• Fits Engine Models: CAT C27 (V12) and CAT C32
• Power Range Support: 597–783 kW
• Common Applications: mining machinery, large construction equipment, heavy haul trucks, cranes, and other heavy duty equipment

The CAT C27 engine uses a V12 configuration designed for stable power output under high load and continuous operation. The C32 engine delivers up to 1000 hp and about 4500 N·m of torque, making it ideal for the toughest work applications. If you’re unsure whether this cylinder block fits your engine, send us a photo of your engine’s nameplate and we can confirm compatibility.

Explore related engine parts on our C27 engine product page and C32 engine product page

Material & Design Features

The 348-9904 cylinder block is cast from high-strength alloy iron, providing excellent resistance to high temperature, high pressure, and wear — essential for heavy duty engine parts that operate under extreme conditions.

Compared with aluminium blocks, alloy iron offers higher strength, better wear resistance, and greater deformation resistance, which helps extend service life and reduce maintenance needs, especially in heavy diesel engines like those used in construction and mining.

Structural & Cooling Design

• Precision-cast cylinder bores for stable piston movement, reduced vibration, and lower engine noise
• Efficient cooling passages that help coolant flow evenly and maintain optimal engine temperature
• Robust structure able to withstand internal force and mechanical impact during operation

This design helps the engine stay cool and reliable in high temperature and high load environments common in heavy duty equipment.

Maintenance & Purchase Guide

Daily Maintenance Tips

To keep your 348-9904 cylinder block in good condition:

• Lubrication: Use SAE 15W-40 full synthetic engine oil. Change every 500 hours to reduce wear between piston rings and cylinder walls.
• Cooling System Care: Clean cooling passages regularly to prevent scale buildup that reduces cooling efficiency. Use CAT-approved antifreeze with a freezing point of –50℃ to avoid freeze damage to the block.
• Seal Check: Perform pressure tests to check seal condition between the cylinder block and cylinder head. If leaks are found, replace with high-strength seals like the 2253099 gasket.

Genuine Part Purchasing Tips

• Buy through authorized CAT parts dealers or professional distributors with IATF 16949 certification to avoid counterfeit parts that can cause engine failures like scoring or block cracking.
• Always verify that the part number 348-9904 matches your engine model (C27 / C32) and cylinder count (12 cylinders).
• Differentiate between marine (NZG series) and land-based applications, as design requirements differ by operating environment.

FAQ

What is the application of part number 348-9904?

The 348-9904 is a cylinder block assembly used on Caterpillar D10N tractors. It is mainly applied in Tier III emission repower or engine conversion projects.

Is the 348-9904 compatible with every D10N machine?

Not all D10N units use this block. Compatibility depends on the machine serial number, such as EHX5681-UP and 2YD1-UP. In many cases, this block is supplied as part of a conversion setup and may require additional modifications.

What are the main dimensions of this cylinder block?

The overall length of the 348-9904 cylinder block is 1177.30 mm.

Are there alternative or related part numbers?

Yes. Commonly related part numbers include 348-9905, 384-9907, and 316-9147.

How can I confirm if this part fits my machine?

To avoid mismatch issues, it is recommended to verify compatibility with a professional Cat parts distributor, such as ZEBPower, based on your engine and machine configuration.

Why Work With Us?

1.We offer 2 quality levels — Original/OEM, Remanufactured— allowing you to choose based on project budget.
2.We work with the authorized CAT agent directly in China
3.Large real-time stock enables fast delivery for urgent mining jobs.
4.Technical team supports part matching & troubleshooting
5.We support long-term supply for distributors and mining projects.”
6.Serving mining clients in South America, Africa, CIS, Auatralia and Southeast Asia etc,.

Packaging & Shipping

Each engine undergoes strict appearance and serial number inspection before shipment and is packaged in reinforced steel-framed wooden boxes with moisture-proof and orientation labels. Key components such as ECM,pistons, turbocharger and fuel injectors etc, are packaged in independent shock-proof containers and are accompanied by export certificates.
We maintain long-term cooperation with international freight forwarders and offer trade terms such as CIF, FOB, and DDP according to customer requirements. Customers in Africa,latin america and Southeast Asia usually choose LCL or FCL shipping by sea, with an average delivery cycle of 18–25 days.