The Caterpillar 3412 is a V12 diesel built for heavy-duty industrial machinery, marine propulsion, and primary or standby power generation. It is turbocharged and aftercooled, with a heavy-duty crankshaft, 24V electrical, and ratings that span roughly 624 to 1,400 hp across the family (this listing is rated about 850 to 1,000 hp). This is a used engine, inspected before it ships.
Two important corrections. First, the live displacement (40.0 liters) is wrong; the 3412 is about 27 liters (1649 ci), and the live bore (127 mm) is slightly off (about 137 mm bore x 152 mm stroke). Second, the live feature list claimed Variable Valve Timing, which large industrial diesels do not have; that was dropped. Confirm the rating and configuration by the engine's arrangement/serial number.
| Item | Details |
|---|---|
| Identity | Arrangement and serial number. |
| Rating | The exact hp rating. |
| Use | Industrial, marine, or genset. |
The engine's arrangement and serial number
The exact hp rating for your use
Your application (industrial, marine, or genset)
Freight delivery and rigging at your site
| Item | Details |
|---|---|
| INCLUDED | The used Cat 3412 engine as confirmed by arrangement/serial number. |
| NOT INCLUDED | Marine gear, genset end, controls, and accessories unless confirmed at order. |
| Tools You Need | A commercial / heavy-equipment installer; freight handling and rigging at delivery. |
This Cat 3412 is a commercial engine; fitment is confirmed by arrangement/serial number:
| Vehicle | Compatibility |
|---|---|
| Use | Industrial, marine propulsion, and power generation |
| Fitment | Confirmed by arrangement/serial number |
| Note | The live fabricated list was not used |
The 3412 is used in industrial machinery, marine propulsion, and gensets. The live compatibility list was fabricated and in places absurd (it claimed the 3412 fits EMD locomotives, which use EMD engines, military aircraft as APUs, competitor mining machines, and large Cat machines that use bigger engines), so it is not reproduced. Confirm the application by the engine's arrangement/serial number. We disclose the donor details before shipping.
Not sure the 3412 matches your application? Call (240) 301-0095 with the engine's arrangement/serial number and your application. Our team confirms it before your order ships.
Quality control for this part includes:
This is a used industrial diesel. We document the arrangement and serial number, identify the rating, and inspect the major systems. It is a heavy freight item needing commercial-grade installation; fitment is confirmed by arrangement/serial number.
| Engine Type | V12 diesel |
|---|---|
| Displacement | About 27 liters (1649 ci) |
| Bore X Stroke | About 137 mm x 152 mm |
| Compression Ratio | About 14:1 |
| Horsepower | About 850 to 1,000 hp (by rating) |
| Torque | About 2,400 to 2,700 lb-ft |
| Aspiration | Turbocharged and aftercooled |
| Electrical System | 24V |
| Fuel System | Electronic (3412E) or mechanical |
| Use | Industrial / marine / genset (freight) |
| Fitment | Confirmed by arrangement/serial number |
| Condition | Used |
| Sku | vaz229 |
Contact (240) 301-0095 within 15 days of delivery.
