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Cummins releases its information on the new 6.7-liter for 2019:

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Cummins releases their information on the new Cummins...

For the first time, 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 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

With the Hydraulic Lash Adjusters for 2019 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 Intervals for fuel filter replacement remains at 15,000 miles (24,000 km) as well as 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.

Cummins
 
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Cummins releases their information on the new Cummins...

For the first time, 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 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

With the Hydraulic Lash Adjusters for 2019 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 Intervals for fuel filter replacement remains at 15,000 miles (24,000 km) as well as 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.

Cummins
ot anything like this for the 2024 Cummins engine? Or what the 2024 engine is called so I can go and find the info please?
 
2019-2024 same.

Only thing that changed was the fuel pump and grid heater relay.

There *may* be something new for 2025 but nothing has been released.
 
2019-2024 same.

Only thing that changed was the fuel pump and grid heater relay.

There *may* be something new for 2025 but nothing has been released.
Thanx
Its odd that after all these years they will have tappet concerns and lifter bore tolerance concerns.
 
Thats because they are not tappets they are hydraulic roller lifters. To many sissys complaining of valve train noise and adjustment ruined it for us
lol I had to read this a few times to understand what you were saying. Because people were complaining about the extra work/cost to adjust tappets its why they gone over to hydraulic lifters. If the block has not changed as said since 2019 to accommodate the hydraulics then that could be the reason why they fail.
 
lol I had to read this a few times to understand what you were saying. Because people were complaining about the extra work/cost to adjust tappets its why they gone over to hydraulic lifters. If the block has not changed as said since 2019 to accommodate the hydraulics then that could be the reason why they fail.
The all new CGI block with hydraulic roller lifters WAS introduced in 2019.
 
Stupid question time again.
Any literature explaining how the exhaust brake works please?
Battling to find anything decent, but my search skill is very poor, for a comparison its like a Rhino putting a fire out in a glass shop.
 
Stupid question time again.
Any literature explaining how the exhaust brake works please?
Battling to find anything decent, but my search skill is very poor, for a comparison its like a Rhino putting a fire out in a glass shop.
Tons if info online just lookup at how a VGT turbo works
 
Good video here on how it works:


Here is a Cummins video showing a cutaway as well:

 
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Sorry guys it seems I was unclear about what I want, VGT is something I am very familiar with.
English is my 8th language so I will try again. Where can I buy a workshop manual then? I want to know how the actual exhaust brake is activated and what happens to the engine, gearbox, fuel system etc
Sorry for the confusion and misunderstanding its my bad.
 
Sorry guys it seems I was unclear about what I want, VGT is something I am very familiar with.
English is my 8th language so I will try again. Where can I buy a workshop manual then? I want to know how the actual exhaust brake is activated and what happens to the engine, gearbox, fuel system etc
Sorry for the confusion and misunderstanding its my bad.

Actually it's not your fault, its actually very hard to find a proper video/explanation of how it works (and I don't know why), even those videos all assumed we knew what they are talking about. The Exhaust brake is that ring with fixed vanes that gets extended into the exhaust portion of the Turbo. It provides the restriction, that is it. The actuator moves that ring to allow for control of the exhaust pressure. There isn't a normal compression exhaust brake on these trucks (like a Jacobs Brake), its all done inside the Turbo on the exhaust side by controlling the exhaust gas going through the turbo.

Jacob Brake:

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Marion Blair did a amazing video explaining the Holset VGT it in a lot of detail and uses the Holset video I posted above. He also uses a CTS Edge to display the Exhaust Pressure and VGT Position which is awesome.


When you activate the Exhaust Brake, it moves that actuator and the ring (which every document calls a nozzle but the nozzles are what moves the ring axially) into the exhaust flow (instead of moving the actual vanes which would be a nightmare with all this soot and carbon).

The VGT exhaust brake retracts (VGT Position) as soon as you add throttle. It is used also to keep the exhaust pressure above a certain value for EGR reasons.

---

The workshop manual can be bought online (expensive) or rented for a short period (Then you can download it page by page to keep it for future reference).

Techauthority is where to you used to start but it's a real mess to actually get to the darn manual itself. Now it's moved to MTSP:

 
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