Caterpillar 221-4482 Cylinder Block Assembly

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Part Type	Cylinder Block Assembly
Engine Series	Caterpillar C7/C9/C7.2
Cylinder Configuration	Inline 6-Cylinder
Serial Number Range	KHX1-UP
Material	Cast Iron

Manufacturer No.

221-4482
2214482
CA2214482

OEM Part No.

221-4482
227-5946
236-4284
270-4212
270-4213
387-8535
387-8536

Engine Part No.

Caterpillar C7
Caterpillar C9
Caterpillar C7.2

Interchange No.

305-8141

Fitment Vehicles

Caterpillar 324D
Caterpillar 325D
Caterpillar 328D
Caterpillar 329D
Caterpillar M325D
Caterpillar 325DL
Caterpillar 950H
Caterpillar 962H
Caterpillar 966D
Caterpillar 966E
Caterpillar 966F
Caterpillar PM102

The Caterpillar 221-4482 cylinder block assembly is a core structural component for Caterpillar C7, C9, and C7.2 series diesel engines. This cylinder block group (GP) serves as the foundation for the engine's rotating assembly, housing the crankshaft, connecting rods, and pistons within its six inline cylinders. The casting features integrated coolant passages, oil galleries, and main bearing caps designed to withstand high combustion pressures and thermal loads typical of heavy-duty construction and industrial applications.

This assembly is identified by serial number range KHX1-UP and is a direct replacement for engine arrangements including 227-5946, 236-4284, 270-4212, 270-4213, 387-8535, and 387-8536. It is compatible with a range of Caterpillar machinery including 324D, 325D, 328D, 329D, M325D, and 325DL hydraulic excavators, as well as 950H, 962H, 966D, 966E, and 966F wheel loaders. The component is available in both remanufactured and unused new conditions, meeting OEM specifications for fit, form, and function.