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Mack Aset Engine

Rebuilt Mack Aset Engines For Sale

Mack ASET EngineThe 2002 EPA regulations put a strain on engine manufacturers to meet aggressive targets. In reply, Mack introduced the ASET family, standing for Applications Specific Engine Technology. The ASET engines reduce emissions by utilizing exhaust gas recirculation. The Aset engines did not fail to impress either, reviews only begin to illustrate how good these engines really are.

Engine Applications and Uses

  • Highway Fleet
  • Vocational
  • Agricultural

Common Mack Aset Engine Problems & Failures

We noticed some recurring themes from clients who intending to replace their Aset’s. 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, nevertheless, some may also be salvageable if caught in good time.

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 Aset EngineProblem 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. In such cases, considering a rebuilt Mack Aset engine could be a viable alternative. At times, your ASET 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 understand that considerations such as time, money, availability etc. will all impact your decision making. Therefore, we have provided some insight by presenting both pro’s and con’s 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 Aset 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 Aset engine. Most importantly, this would be a good substitute if you’re trying to save some cash. Additionally, looking into a rebuilt Mack Aset engine that Big Bear Engine Company has for sale can be an excellent option for those seeking a cost-effective alternative.

We always strive to uphold a professional level of service, whatever the task. In the realm of remanufacturing, particularly with Mack Aset engine problems, we guarantee this level of quality is sustained 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 important to note, all of our Aset remanufactured long blocks are built with both reman and new parts. Therefore, we do not just recondition or refurbish old parts, instead we fully rebuild the old Aset engine back to its original OEM specs.

Thorough Cleaning

Careful cleaning is essential during 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 done by stripping the Aset, 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 the high standards required for our rebuilt Mack Aset engines we offer for sale.

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 magnetic particle we use carefully inspects 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 particular engines to eradicate the chances of cylinder head distortion after the head is bolted and torqued to the block. This process 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 achieve even spreading of stress on the bearings, the connecting rods are cleansed, then machined to 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 Aset 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 accessible.

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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 Aset core materials are thoroughly inspected and examined against original equipment specifications for correct dimensional tolerances. Replacement 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

*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.

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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