Cummins 6.7L Turbo Diesel 2019

Cummins 6.7L Turbo Diesel (2019)

Power 370 - 400 hp
276 - 298 kW
Torque 850 - 1000 lb-ft
1152 - 1356 N•m
Certification EPA 2018

In 2019, we celebrated a 30-year partnership with RAM truck that started with the Cummins 5.9L Turbo Diesel in model year 1989 through our latest 6.7L Turbo Diesel.

The latest 6.7L Cummins Turbo Diesel brings to the table more horsepower and torque, improved NVH and reduced weight.


Pickup Truck


HD pickup buyers can get an impressive 1000 lb-ft of torque. This high-output (HO) rating is offered exclusively in the RAM 3500 equipped with the Aisin transmission option. The new high-output engine boasts 400 hp and 1000 lb-ft of best-in-class torque.

For RAM 2500 and 3500 (equipped with a 68RFE Auto) HP and torque have increased to 370 hp and 850 lb-ft to provide the right power for these models.

In addition to moving to a higher capability high pressure pump, several critical features were implemented with model year 2019 to maintain the proven reliability and durability our customers have come to expect:

  • A Compacted Graphite Iron (CGI) material for the block allows us to increase the cylinder pressure capability while reducing the overall weight by almost 60 lbs
  • A new cast-iron cylinder head containing high-temperature capable exhaust valves actuated by all-new hydraulic lash adjusters in the block eliminates the need for valvetrain adjustment service intervals
  • The heart of the engine is a higher-strength alloy crankshaft with a 10-bolt crank flange driving newly-designed forged connecting rods and new bearings which transfer power from the low-friction ring-wrapped pistons
  • A new larger Cummins Holset variable-geometry turbocharger optimized with heavy duty bearings, and a new compressor-side housing is a key ingredient in the new ratings, pumping 33 pounds per square inch (psi) of fresh air into the engine
  • The new fuel-delivery system includes a new 29,000 psi (2,000 bar) fuel pump and fuel rail with Cummins Filtration “filter in filter” NanoNet® technology


  HO - w/ Aisin SO – w/ 68RFE Auto
Horsepower 400 370
Torque 1000 850
Displacement 6.7L 6.7L
Number Of Cylinders 6 6
Bore 107 mm (4.21 in) 107 mm (4.21 in)
Stroke 124 mm (4.88 in) 124 mm (4.88 in)
Compression Ratio 16.2 :1 19 :1
Engine Wet Weight 1060 lbs (62 lbs reduction from 2018) 1060 lbs (62 lbs reduction from 2018)
Aspiration Turbocharged and Charge Air Cooled Turbocharged and Charge Air Cooled
Fuel System Bosch HPCR Bosch HPCR
Model Transmission Horsepower (hp) Torque (lb-ft)
RAM 3500 Aisin Auto 400 1000
RAM 3500 68RFE Auto 370 850
RAM 2500 68RFE Auto 370 850

With the latest Hydraulic Lash Adjusters we have eliminated the need to adjust the overhead completely and the Interval for the Fleetguard breather filter has been extended to 75,000 miles.

Maintenance Interval for fuel filter replacement remains at 15,000 miles (24,000 km) and oil change interval stays at 15,000 miles (24,000 km) and is duty cycle based. This engine uses an oil change monitoring system which will display a message on the vehicle information center that alerts the driver to change the oil.

Don't forget that your new Cummins 6.7L Turbo Diesel engine requires low-ash engine oil; failure to use this type of oil can result in serious damage to the exhaust aftertreatment system in your vehicle. Be sure to purchase engine oil that meets CES 20081 standards.

Due to the new EPA regulations, owners of MY07 and later Cummins 6.7L turbo diesel-powered highway vehicles must refuel only with Ultra-Low Sulfur Diesel (ULSD) fuel meeting a 15-ppm on-highway requirement. Use of all other fuels is prohibited and may result in damage to the engine and/or the aftertreatment system. Be sure to purchase your diesel fuel from a reputable fuel station. For most year-round service, a high-quality No. 2 diesel fuel that meets ASTM specification D-975 (0.0015% sulfur level) will maintain good performance. EPA requires retail fuel stations that carry and dispense LSD and ULSD to label the pumps with a Low-Sulfur Highway Diesel Fuel and an Ultra-Low Sulfur Diesel label.

In addition, diesel fuel sold for off-highway use should not be used in any Cummins turbo diesel engine. This is due to off-highway fuels not necessarily meeting the fuel cleanliness or lubricity requirements for on-highway fuel specifications. Use of such off-highway fuels can result in accelerated wear to fuel system components.

For complete maintenance information, please consult your Owner's Manual or Operations and Maintenance Manual.

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