Engine Overhaul Kit

Parts for Caterpillar 3412B – Engine Overhaul Kit Section

The Caterpillar 3412B engine is a V-12 powerhouse relied on in marine propulsion, offshore oilfield support, mining operations, industrial power generation, and other high-demand environments. Known for its reliability and ability to run under continuous heavy loads, the 3412B is a step forward in refinement compared to the earlier 3412 model, offering improved fuel efficiency, enhanced combustion, and greater durability in long-term use.

When the time comes for a rebuild, choosing the correct overhaul kit matched to your arrangement number and serial prefix ensures that your engine is restored to factory-level standards. Below you’ll find the dedicated selection of in-frame rebuild kits and gasket sets for the Caterpillar 3412B, each listed with its compatible configurations.

Rebuilt Kit for Caterpillar 3412B – 14.1:1 Compression Ratio

This comprehensive in-frame rebuild kit is designed for Caterpillar 3412B engines configured with a 14.1:1 compression ratio. This ratio provides a strong balance of power and efficiency, making it ideal for marine, offshore, and heavy industrial duty cycles.

Features

• High-strength liners and pistons matched to the 14.1:1 ratio.

• Optimized for both marine propulsion and stationary power generation.

• Includes piston rings, bearings, seals, and a full set of gaskets required for in-frame rebuilds.

Compatible Arrangements

1054832, 1054833, 1160050, 1160051, 1326105, 1326106, 1326109, 1326110,
1433522, 1433523, 1433524, 1433525,
1498154, 1498155, 1498156, 1498157,
4P6983, 4P6984,
1302549, 1031819, 1031820,
1160052, 1160053,
1797010, 1797011, 1797012, 1797013,
1483597, 1484447, 1484448,
4643952, 4644084, 4649656

Serial Number Prefixes

3JK, 60M, 7BL, RTY

Rebuilt Kit for Caterpillar 3412B – Arrangement 6N1160 (Early Series)

This in-frame kit is tailored for Caterpillar 3412B engines configured with arrangement number 6N1160 in their early production series.

Features

• Provides all key replacement components to restore the engine’s core performance.

• Matched to early 3412B builds for proper fit and reliability.

• Includes pistons, liners, rings, gaskets, and bearings for complete in-frame repair.

Compatible Arrangement

6N1160

Serial Number Prefix

60M (serials 1–386)

Rebuilt Kit for Caterpillar 3412B – 14.3:1 Compression Ratio

For operators requiring greater torque and combustion efficiency, this kit is engineered for Caterpillar 3412B enginesdesigned with a 14.3:1 compression ratio. This ratio is often selected for propulsion engines or power generation units running under constant heavy loads.

Benefits of the 14.3:1 Ratio

• Increased power density with optimized torque delivery.

• Improved combustion efficiency under continuous operation.

• Ideal for engines in tugboats, offshore supply vessels, and prime power generators.

Compatible Arrangements

4R9970, 4R9980, 1243400,
1790769, 1790770, 1790771,
1855890,
1W0733, 1W3500, 1W733,
4N2247, 4W1146, 4W3920,
7W7584, 5R9137, 5R9140, 5R9150,
1315410, 1315411, 1316204,
1751240, 1790772, 1790773, 1790774, 1790775, 1790776, 1790778, 1790779, 1790780,
1793231, 1793232,
1835411, 1835412, 1835413, 1835415, 1835416, 1835417, 1835418, 1835454,
2385322 through 2385340,
2385354 through 2385371,
1483589, 1484440

Rebuilt Kit for Caterpillar 3412B – Arrangement 6N1160 (Later Series)

This kit is also compatible with later production runs of the 3412B with arrangement 6N1160.

Features

• Designed for engines that fall under the updated 6N1160 build specifications.

• Provides matched liners, pistons, rings, and gaskets for reliable operation.

Compatible Arrangement

6N1160

Serial Number Prefixes

60M (387 and up)

Gasket Set for Caterpillar 3412B In-Frame Repair

For operators needing only sealing components, this gasket set provides everything required to reseal the Caterpillar 3412B engine during an in-frame service or partial rebuild.

Features

• Complete set of head gaskets, liner seals, and critical O-rings.

• Built for durability under high combustion pressures.

• Prevents coolant, oil, and combustion leaks after repair.

Compatible Serial Number Prefixes

9BR, RLR, RTY, REA, 3JK, 7BL, 7HG, 9KS, 9PW

Why Choose Diesel Pro Power for Caterpillar 3412B Rebuild Kits

• Engine-Specific Fit: All kits are organized by arrangement numbers and serial prefixes to ensure the right match for your 3412B engine.

• Durability: Built for the extreme demands of marine propulsion, offshore rigs, and heavy-duty industry.

• Trusted Worldwide: With more than 40,000 satisfied customers globally, Diesel Pro Power is a leader in aftermarket Caterpillar parts.

• One-Stop Source: From complete overhaul kits to gasket sets, everything required for a successful 3412B rebuild is available in one place.