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Mack E-Tech Engine

Mack E-Tech Engines For Sale

Mack E-Tech EngineThe Mack E-Tech is a 12-liter, 6-clyinder multisystem cooled diesel engine which was designed to meet the 2002 emissions requirements. What’s more, Mack achieved this while maintaining an impressive 460 horsepower. The features that made this possible was the use of cooled exhaust gas recirculation. However, Mack did claim how they were utilizing further technologies in order to meet the 2002 requirements. The E-Tech was entered into service in 1999, these engines are still being produced and retain their reputation for having a brilliant horsepower to weight ratio. For those interested in the details, the Mack E-Tech engine specs provide further insight into what makes these engines so efficient and dependable.

Engine Applications and Uses

  • Mining
  • Oil and Gas
  • Agriculture
  • Construction
  • Industrial

Common Mack E-Tech Engine Problems & Failures

We tend to notice some recurring themes from customers who wish to replace their E-Tech engines. So, we have assembled a list of frequent problems that are regularly reported. Some of the issues featured below may mean your engine has run out of time, nevertheless, some may also be salvageable if caught in good time, particularly if you are familiar with the Mack E-Tech engine specs which can be used as a reference for assessing the engine's condition.

AERA Association Member

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

Mack E-Tech Engine Replacement Options

Sometimes the truth is your engine is beyond saving, there are several causes than can impair your engine, but not all mean your engine is a goner. At Times, your E-Tech may just need a few new parts, or maybe it just needs a little refreshment to keep it in good form. We understand that considerations such as time, money, availability etc. will all influence your decision making. Therefore, we have supplied some insight by providing both pro’s and con’s of a new engine from a dealer.

Remanufacturing Process

For those of you reading this that are unlucky enough to have seen your engine endure a devastating failure, a remanufactured E-Tech long block would be the ideal solution. Moreover, if you have good re-usable external components that are still functionable, then these can be salvaged from your beloved E-Tech. Knowing the Mack E-Tech engine specs can be invaluable in identifying which components are still within specifications and can be reused. Most importantly, this would be a good substitute if you are trying to save some money.

We always endeavor to uphold a professional level of service, whatever the task. In the realm of remanufacturing, we guarantee this level of quality is maintained by first performing 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 vital to mention, that all of our E-Tech’s remanufactured long blocks are built with both reman and new parts. Therefore, we do not just recondition or refurbish old parts, instead we totally rebuild the old E-Tech engine back to its original OEM specs.

Thorough Cleaning

Careful cleaning is imperative in the process; therefore, we endeavor to relieve your engine of any contaminations that could promote or cause both component failure or engine failure. This is accomplished by stripping the E-Tech, 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, ensuring that they align with the Mack E-Tech engine specs for optimal performance and reliability.

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 assure correct valve seating.

Cylinder Blocks

The block is inspected with magnetic particle for any cracks or additional damage, a step that is crucial before proceeding to the Mack E-Tech valve adjustment to ensure the engine is in good condition. The cylinders and then bored, honed and again inspected to the specific tolerances. Torque plate honing is performed on particular engines to eradicate the chances of cylinder head distortion after the head is bolted and torqued to the block. This process eliminates 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 achieve even spreading of stress on the bearings, the connecting rods are cleaned, then machined to OEM specs, then honed to the standard 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 E-Tech engines will obtain a set of new parts such as pistons and rings, bearings, gaskets and sealers, and liners. These parts contain both OEM and Aftermarket when available.

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Remanufactured Engines Standards

To best define remanufacture, would be to aim to make as close to new as possible. In pursuit of this, wearable parts are routinely replaced. All E-tech core material is thoroughly inspected and examined against original equipment specifications for correct dimensional tolerances. Alternate parts are new or requalified. If new, parts are made in the same production processes as original equipment. Testing is performed to manufacturer specifications and original production standards.

Mack Aset Long Block Parts List:

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

Mack E-Tech Engine

*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.

MACK E-Tech Spec

Engine Data

Bore123.83 mm (4.875 in)
Stroke165.10 mm (6.5 in)
Displacement728 CID (12.0 L)
Compression Ratioup to 375 hp = 16.5:1, above 375 hp = 15.3:1

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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