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Cat 3412 Engine

CAT 3412 Engines For Sale

CAT3412 Engine The 3412 Cat is a heavy-duty diesel engine offering large amounts of horsepower – max output 551 bkW. The 3412 can be used to power a variety of off highway heavy equipment such as bulldozers, scrapers, haul trucks, and dump trucks. These engines are commonly seen in numerous industrial applications like mining, drilling, oilfield, agricultural, forestry and construction. Reviews and statistics reveal that the 3412 Cat is actually one of the most demanded engines for the aforementioned industries. This is due to Caterpillar 3412’s reliability, outstanding performance, and dependability.

Engine Applications and Uses

  • Construction
  • Agricultural
  • Trucks
  • Oil & Gas

Common CAT 3412 Engine Problems & Failures

We noticed some recurring themes from clients who intending to replace their 3412 Cat engines. So, we have gathered a list of recurrent problems that are often reported. Some of the issues featured below may mean your engine has run out of time, nonetheless, some may also be salvageable if caught in good time.

AERA Association Member

  • Camshaft Failure
  • Connecting Rod Failure
  • Cracked Cylinder Head(s)
  • Crankshaft Failure
  • Dropped Valves
  • Extreme Blow By
  • Lack of oil or oil pressure
  • Lifter/Roller Failure
  • Over Fueling
  • Scored Pistons and Liners
  • Spun Crankshaft Bearings

Caterpillar 3412 Engine Replacement Options

Sometimes the truth is your engine is beyond saving, there are numerous causes than can impair your engine, but not all mean your engine is doomed. At times, your 3412 Cat may just need a few new parts, or maybe it just needs a little refreshment to keep it in good shape. We do in fact appreciate that considerations such as time, money, availability etc will all impact your decision making. Therefore, we have provided some insight by offering both pros and cons of a new engine from a dealer.

Remanufacturing Process

For those of you reading this that are luckless enough to have seen your engine suffer a dreadful failure, a remanufactured 3412 Cat long block would be the ideal answer. Moreover, if you have good re-usable external components that are still in good nick, then these can be salvaged from your much-loved Caterpillar 3412 engine. Also, this would be a good substitute if your trying to work to a budget.

We constantly strive to uphold a professional level of service, whatever the task. In the realm of remanufacturing, we guarantee this level of quality is sustained by first executing a full core tear down, cleaning, inspection, and machining of the engine. This is carried out on every engine before it leaves our facility.

It is crucial to note that all our 3412 Cat remanufactured long blocks are constructed with both reman and new parts. Therefore, we do not just recondition or refurbish old parts, instead we fully rebuild the old Caterpillar 3412 engine back to original OEM specs.

Thorough Cleaning

Careful cleaning is essential during the process; therefore, we strive to relieve your engine of any contaminations that could promote or cause both component or engine failure. This is done by first stripping the 3412 Cat, then putting the blocks, heads, rods, crankshafts, and camshafts through a chemical jet wash or hot tank.


Before our quality control division inspect the finished product, the crankshafts are precision machined to the precise tolerances, polished and magnafluxed.

Cylinder Heads

Heads are resurfaced to guarantee a proper sealing surface with the block and a finish compatible with today's new gasket materials. Valve height is mic-d and every head is vacuum tested to guarantee correct valve seating.

Cylinder Blocks

The magnetic particle is used to inspect the block for any cracks or further damage. The cylinders and then bored, honed, and again inspected to the specific tolerances. Torque plate honing is performed on engines to eradicate the chances of cylinder head distortion when the head is bolted and torqued to the block. This process consequently removes the main source of engine blow-by. Block surfaces are then machined and inspected to ensure proper finish.


Camshafts are inspected and precisely machined to provide correct lift. Lobs are measured with a micrometer to make sure OEM tolerances are met.

Connecting Rods

In order to attain an even distribution of stress on the bearings, the connecting rods are cleansed, then machined to the OEM specs, then, honed to the traditional diameter of the original equipment. New bushings are also fitted and machined in all bushed rods, every rod is also inspected for any bend and/or twist.

New Parts

Great performance and reliability are what we strive for, therefore, all 3412 Cat engines will obtain a set of new parts, namely pistons and rings, bearings, gaskets and sealers, and liners. These components are both OEM and Aftermarket when accessible.

Request a Quote

Please fill out the form below with your information and request. A member of our staff will be with you shortly.

Remanufactured Engines Standards

To best define remanufacture, would be to aim to make as close to new as possible. In pursuit of this, all wearable parts are routinely replaced. All 3412 core materials are then carefully inspected and examined against the original equipment specifications for correct dimensional tolerances. Replacement parts are new or requalified. If new, parts are made in the same production procedures as original equipment. Testing on all our 3412 Cat engines for sale is also performed to manufacturer specifications and original production standards.

CAT 3412 Long Block Parts List:

  • Caterpillar 3412 Diesel EngineCamshaft
  • Complete Loaded Cylinder Head
  • Cylinder Block
  • Followers/Lifters
  • Intermediate Cover
  • Liners
  • New Upper and Lower Gasket Set
  • Pistons
  • Timed Front Gear Group
  • Rings
  • Crankshaft
  • Connecting Rods
  • **1 Year Warranty

*Note: We can provide new oil pumps, oil coolers, water pumps, turbos, injectors and fuel pumps for additional cost with the long block but will not come assembled to the engine.

**First 6 Months Parts & Labor, Second 6 Months Parts Replacement Only. Ask your sales representative for a full copy of our remanufactured long block warranty.

CAT 3412 Spec

Engine Data

Minimum Power476.0 bkW
Maximum Power551.0 bkW
Bore137.0 mm
Stroke152.0 mm
Displacement27.0 l
AspirationTurbocharged Aftercooled
Weight Net (dry)2730.0 kg
Oil Chang Interval250 hours
Rotation (from flywheel end)Counter-Clockwise
Flywheel and Flywheel HousingSAE No. 0
Flywheel Teeth151
Lube System – Refill139.0 l
Cooling System – Refill58.0 l
Length1980.0 mm
Width1300.0 mm
Height1285.0 mm

Give us a call today at 844-340-4114 for immediate sales and support for the Cummins 4BT, Cummins 6BT, 6CT, ISC, 855, QSB 4.5 L or CAT 3306. If you have any questions check out our FAQ Page. We are always ready to help or just listen to your crazy off-roading adventures!

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