Remanufactured Cummins N14 Engines

Cummins N14

Engine Overview

The Cummins N14 replaced the older NT Engines as the workhorse. The Cummins N14 is a 14-Liter Engine inline 6 cylinder configuration. The first N14 Cummins Engines were a mechanical style engine. Later the electronics were incorporated into the N14 Cummins Engines. The N14 Cummins Engines were produced from the mid 80’s to the late 90’s. N14 Engines are known as a very dependable engines and used in many on-highway & off-highway agricultural & industrial applications from Tractors trailers, glyder kits to Pumps.

Cummins N14 Applications

Tractor Trailers

Glyder Kits


Stationary Mining

Drop-in Cummins N14 Engines Dynometer Testing

All of NPD’s Cummins N14 Complete Drop-In engines are 100% dyno tested prior to shipment. Computer controls ensure that each engine dyno test is conducted under standard, repeatable settings. Every engine is run through a warmup cycle; three separate cruise segments simulating light, medium and heavy throttle conditions; maximum torque and horsepower tests; both high and low idle tests; and a black light leak detection test with dyed oil, coolant and fuel.

We supply these N14 Cummins engines in a couple different configurations.

N14 Long Block                                                         1 – 2 Weeks Build Time

N14 Complete Long Block w/fuel system            1 – 2 Weeks Build Time

N14 Complete Drop-in Engine                                1 – 2 Weeks Build Time 

100% of pistons, rings, bearings, bushings, gaskets and seals. Matched OEM requirements for piston type depending upon HP and application. All heads get new valves and are vacuum tested to ensure the quali-ty of the valve job. All heads are pressure tested and upgraded to the latest style valve seal. Cylinder head seats replaced 100% new. 100% ground of camshafts’ lobes. All connecting rods are de-magnetized. Core plugs are 100% stainless steel to avoid corrosion. Blocks, heads and crankshafts are 100% magnaflux tested to avoid cracked components. Connecting rods have new bushings installed and both large and small end are remachined to OEM specifications. Crankshaft is checked for size, reground, if necessary, and micro-polished to OEM specifications


  • ASE Master Certified Builder
  • New Pistons – Rings – Wrist Pins
  • New Lower Press Fit Liners
  • New Rod and Main Bearings
  • New or Reman Camshaft,
  • New Pins & Rollers
  • New Cam Bearings
  • New Connecting Rod Bushings
  • New Plugs
  • New Premium Gaskets & Seals
  • New Filters
  • New or Reman Accessory Drive.
  • New or Remanufactured Crankshaft No welded cranks
  • New or Remanufactured Water Pump
  • New or Remanufactured Lube Pump
  • New or Remanufactured Turbo
  • Remanufactured Rods
  • Remanufactured Block: Counterbores Cut, Line Bored, Line Honed, Resurfaced, Magnifluxed, Cleaned & Pressure Tested
  • Remanufactured Oil Cooler
  • Remanufactured Premium Cylinder Heads, or Genuine Cummins® Recon
  • Remanufactured Fuel Pump with all Genuine Cummins® Parts
  • Remanufactured Cummins® Recon Injectors
  • Remanufactured Air Compressor.

Cummins N14 Engine Configurations

Bare Long block

New cylinder head “untimed”, crank, block & all internals new. Balance gasket set included.

Complete long block

New “Timed” Cylinder Head with camshaft, cam followers and timing gears, water pump, oil pump, oil cooler, front cover and rear cover.

Drop-In engine assembly

This engine will generally include the block, heads, valve covers, oil pump and pan, timing cover, turbo, rear cover, fuel injection pump with injectors, intake manifold, water pump, exhaust manifolds, and oil cooler. (Some of these components may not be included with particular engines or applications based on engine type.) Our engines do not include belts, hoses, sending units, air compressors, flywheel, fan blade, remote oil coolers, starter, alternator or any special drive units. The engine will be dyno tested checking horsepower, RPM and oil pressure. All phases of the governor, valve train and fuel injection system will be adjusted to OEM specifications.