Caterpillar 3304 Cylinder Block 1N3574 (Spacer Plate Type)

Restore Compact Power: Caterpillar 3304 Block for Industrial Diesel Engine Parts

The Caterpillar 3304 Cylinder Block 1N3574 serves as a critical foundation in our wholesale catalog, engineered to support the rigorous demands of medium-duty earthmoving equipment. We understand that for legacy machines like the D4E dozer and 955 track loader, finding reliable core components is essential for extending fleet service life. Our supply chain ensures that these heavy cast iron units are stocked for immediate dispatch, providing a cost-effective, high-quality alternative to scarce OEM cores for distributors and rebuilders.

Designed to withstand the high compression of the Caterpillar 3304 Direct Injection (DI) engine, this block features reinforced webbing to resist the vibrational stress common in tracked equipment. It addresses typical failure modes such as main bearing saddle fretting and deck surface erosion. By restoring the structural integrity of the bottom end, this 1N3574 block ensures proper cylinder sealing and oil pressure retention for thousands of operational hours.

Technical Specifications for 1N3574 Block

Technician’s Note: Assembly & Inspection

Liner Protrusion Criticality: The 3304 engine relies on a spacer plate system for head sealing. Before final assembly, you must clean the counterbore ledge thoroughly and dry-fit the cylinder liners. Verify that the liner protrusion (projection) height is within manufacturer specifications relative to the spacer plate. Incorrect projection is the leading cause of head gasket failure and coolant leaks in these engines.

Compatible Equipment for Caterpillar 3304

Why Source Industrial Diesel Engine Parts from Ruich Value?

• Leak Prevention: Every 3304 block undergoes rigorous water jacket pressure testing to guarantee there are no casting pores or cracks, preventing internal coolant cross-contamination.
• Deck Precision: The top deck is CNC milled to exact flatness tolerances, ensuring a perfect seal for the spacer plate and Multi-Layer Steel (MLS) gasket system.
• Line Boring Accuracy: Main bearing bores are precision-machined and checked for alignment, allowing for standard crankshaft fitment without the need for additional machining.
• Inventory Power: We maintain a consistent stock of 1N3574 blocks to support urgent fleet maintenance, reducing downtime for critical D4 and 955 series machines.
• Export Protection: All blocks are treated with long-term anti-rust oil and secured in reinforced wooden crates to withstand international shipping conditions without corrosion.

Complete Caterpillar Cylinder Block Catalog

Our catalog supports a wide range of Industrial Diesel Engine Parts, providing solutions for both the compact 4-cylinder 3304 and the larger 6-cylinder 3300 series.

Category coverage: We supply reliable aftermarket castings that meet or exceed OEM specifications for fitment and durability across the entire Caterpillar legacy range.

View all specs in our Caterpillar Industrial Cylinder Block Catalog.

Or explore our complete Caterpillar Industrial Diesel Engine Parts Catalog

Technical FAQ: Caterpillar 3304 Block 1N3574

Q1: Is this block for the “Spacer Plate” engine?

Yes, the 1N3574 is designed for the 3304 Direct Injection (DI) engines that utilize a spacer plate between the block and head. If you have an older Pre-Combustion (PC) engine without a spacer plate, this block is not compatible.

Q2: Are 3304 parts interchangeable with the 3306?

Yes, many internal components are shared. The cylinder liners, pistons, connecting rods, and valve train components are typically interchangeable between the 3304 (4-cylinder) and 3306 (6-cylinder) engines, which simplifies inventory management.

Q3: Does the block include the camshaft bearings?

The bare block comes with main bearing caps and bolts installed. Camshaft bearings are usually sold separately or as part of a complete rebuild kit, as they should be installed after the block is hot-tanked and cleaned.

Request a Wholesale Quote

Email: [email protected]

WhatsApp/Phone: +86 13889277673