631E Remanufactured for CAT 3408 Engine for Sale

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The 631E Caterpillar 3408 engine is most commonly used in industrial applications for mining and also hauling vessels like tug boats and ferries. They have a reputation for lasting a long number of years under continued use.

Our remanufactured 631E CAT 3408 engines for industrial applications work with arrangement 1W-3782.

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Our 3408 rebuilt engines are remanufactured to the highest standards. We remanufacture in-house to what is known as Bare Metal Remanufacturing. We fully disassemble every part of the engine down to a bare cylinder block. All paint is removed for inspection purposes. This allows us to find any casting defects or cracks.

Complete CAT 3408 Engine Overhaul

All parts are cleaned and inspected. Cylinder blocks are machined. Crankshafts are measured and polished. For every engine rebuild, we replace all:

  • Sensors, wiring harnesses and computer
  • Regulating springs and valves
  • Camshafts
  • Turbochargers
  • Piston and liner kits
  • Transmission, brake, hydraulic and coolers
  • Gaskets, seals, and o-rings
  • Oil and fuel filters
  • Starter and alternator
  • Wear parts
  • Fuel pump and injectors
  • Exhaust hardware
  • Oil cooler
  • Bearings, cups, and plugs
  • Oil pump
  • Water pump and regulators
  • Rocker shafts and rockers
  • Cylinder Heads
  • Belts, hoses, clips, brackets, fittings and clamps

Genuine Caterpillar Parts for Your Caterpillar 631E CAT 3408 Engine Replacement

At Independent Rebuild Specialist, we use genuine Caterpillar parts to achieve premium quality rivaling new CAT 3408 engines fresh off the factory floor.

Painted, Dnyo Tested and Dressed for Shipping

All of our rebuilt CAT engines are painted at our facility and then Dyno tested. Many of our engine Dyno tests can be viewed on our YouTube Channel.

All of our engines are shrink wrapped and secured to a customized steel skid for stability and protection from weather elements during storage and shipping.

Our CAT Engine Rebuilds are Guaranteed…AND Fast!

We are not a middleman and stand by our work with a 100% warranty to assure our 3408 engines can be dropped-in quickly for fast and reliable engine replacement at your location.

Our typical turnaround time for remanufacturing a 631E CAT 3408 is as little as one week and we ship to most locations around the world.

Get a No Obligation Quote

We reply to all quote requests usually within the hour, during normal U.S. business hours, but always within 24 hours. Call us at 303-659-4652 with any questions about our 631E CAT 3408 rebuilt engines for CAT trucks, dozers and drills or use our Quote Request form to see if our CAT replacement engines are a possible fit for you.