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John Deere 6068 Engine

John Deere 6068 Engines For Sale

The John Deere 6068 comes as either naturally aspirated or straight turbo and turbo inter-cooled, with a variety of outputs for each of these categories. The John Deere 6068 boasts impressive features such as a 4-valve cylinder head, high-pressure common-rail, and engine control unit, cooled exhaust gas recirculation, variable geometry turbocharger, and is air to air after cooled. These features work in unison to create a truly impressive engine that is deserving of the reputation attached to its manufacturer.

Engine Applications and Uses

  • Industrial
  • Marine

Common JD 6068 Engine Problems & Failures

Here we have listed some engine problems and failures that are commonly reported by people interested in replacing their 6068 engines. Unfortunately, some of the problems include those that could lead to the complete and utter ruin of your engine, but some John Deere motors, if caught early on, may be salvaged.

AERA Association Member

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

JD6068 Engine Replacement Options

When it comes to the condition of your engine there could be a whole list of problems, the worst causing you could be left with a problem where your only route out is full replacement. However, less depressing situations may only compel you to change some parts or components, or maybe, give your John Deere 6068 engine a new lease of life by choosing a well-deserved refreshment. Fear not, we understand that cost, time, and availability will all influence your verdict - so allow us to inform you of the pros and cons of a new engine from the dealer.

Remanufacturing Process

A remanufactured 6068 long block is a wonderful choice for someone who has suffered an internal engine failure, especially if they have any re-useable external components that may still be of use from their old engine. Long blocks are also a good option when trying to cut back on costs in the search of a solution.

Our team of machinists and engine builders carefully executes a full core tear down, cleaning, inspection, and machining of the engine right before it leaves our facility, ensuring excellence each and every time.

However, it is important to mention that all of our 6068 remanufactured long blocks are constructed with a combination of both reman and new parts for John Deere motors for sale. We do refrain from reconditioning or refurbishing old engine parts, preferring to completely rebuild the old 6068 motors back to OEM specs.

Thorough Cleaning

Firstly, every 6068 engine is entirely stripped. Blocks, heads, rods, crankshafts, and camshafts are carefully cleaned in a chemical jet wash or hot tank to remove stubborn impurities that could eventually assist both early component and engine failure.


Leaving nothing to chance, crankshafts are precision machined to exact tolerances, polished & magnafluxed, then inspected by our highly attentive quality control department for every John Deere 6068 engine.

Cylinder Heads

Heads are then resurfaced to guarantee a good sealing surface with the block and a finish compatible with today's new gasket materials. Valve height is mic-d and correct valve seating is ensured by way of vacuum testing.

Cylinder Blocks

Blocks are treated with a magnetic particle that inspects for both cracks and imperfections. Cylinders are then bored, honed, and inspected to precise tolerances. Torque plate honing is done on particular engines to eliminate the chances of cylinder head distortion after the head is securely bolted and torqued to the block. This process removes a major cause of engine blow-by. Block surfaces are machined and then inspected to guarantee proper finish.


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

Connecting Rods

Connecting rods are cleaned, then machined to back to O.E.M. specifications before being perfected to the standard diameter of the original equipment ensuring even distribution of stress on the bearings. New bushings are also fitted and then machined in all bushed rods. Every rod is also carefully inspected for bend and twist.

New Parts

Our 6068 long block engines obtain a standard set of new parts such as pistons and rings, bearings, gaskets and seals, and liners. The new parts guarantee reliable performance and dependability throughout the life of your engine.

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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

We think that to remanufacture is to make as new as possible. To that end, wearable parts are automatically replaced. All 6068 core material is then thoroughly inspected and examined against the original equipment specifications for correct dimensional tolerances. Replacement parts are either new or requalified. If new parts are used, they are made in an identical production process as the original equipment. Testing is also performed to manufacturer specifications and original production standards.

JD 6068 Long Block Parts List:

  • John Deere 6068 EngineCylinder Block
  • Complete Loaded Cylinder Head
  • Crankshaft
  • Connecting Rods
  • Pistons
  • Liners
  • Rings
  • Intermediate Cover
  • Timed Front Gear Group
  • New Upper and Lower Gasket Set
  • Camshaft
  • Followers/Lifters
  • **1 Year Warranty

*Note: We can provide new oil pumps, oil coolers, water pumps, turbos, injectors, and fuel pumps for an 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.

John Deere 4045 Specs

Engine Data

Engine TypeIn-line, 4-Cycle
Displacement6.8 L (415 cu in)
Bore106 mm (4.17 in)
Stroke127 mm (5.00 in)
Compression Ratio17.0:1
AspirationTurbocharged and air-to-air aftercooled
Length1161 mm (45.7 in)
Width616 mm (24.3 in)
Height1128 mm (44.4 in)
Engine Weight (Dry)678 kg (1495 lb)

Give us a call today at 844-340-4114 to view the John Deere 6068 engines we have for sale or 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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