The improvement process has never been stopped during the last ten years of production, so the 2017 model year engines already produce up to 900 lb-ft of torque. All ISB6.7 engines are equipped with an air-to-air intercooler. It does the engine braking by restricting exhaust flow. The VGT also has an integrated exhaust brake function. This turbocharger can block exhaust flow to increase temperatures inside the DPF, which reduces emission levels. Click the button below to add the CUMMINS 3957492 REAR MAIN SEAL HOUSING GASKET 03-18 5.9/6.7L to your wish list. Holset HE351VE variable geometry turbocharger (VGT) is another interesting new feature of the engine. CUMMINS 5259499 REAR MAIN SEAL (89-18 5.9L/6.7L) 45.49. So 2 liters of DEF is consumed for every 100 liters of diesel fuel. The DEF fluid is injected inside the DPF to help the regeneration process of soot at the lower temperature. In the 2010 model year, the engine received an additional DEF (diesel exhaust fluid), SCR (selective catalytic reduction), and EGR cooler. Also, the engine had the exhaust gas recirculation system (EGR) with cooling. A diesel particulate filter has a ceramic matrix, which filters soot particles and regenerates them under high temperature, heated by exhaust gases. /rebates/&.com252fmedium-and-heavy-truck252f9zdf0-looking-torque-specs-cummins-qsb-6-7-engine. The DPF filter cleans the exhaust gases from soot by more than 90 percent. In 2007, the first year in production, the engine was the first Cummins diesel equipped with a diesel particulate filter (DPF). The new version was designed guided by stricter requirements on Federal emissions regulations. The 6.7L Cummins engine had a high-pressure Common Rail fuel injection system, electronically controlled fuel injection pump, and new equipment for emissions reduction. There are many changes compared to the last generation B5.9 version, but the overall design remains the same. The difference between ISB 5.9 and 6.7 cylinder head is the ISB6.7 head has holes (Sensor Hole Style head) from the air intake plenum side. On top of the block, there is a 24-valve cast iron cylinder head similar to the ISB 5.9. The engine block is still made from cast iron. That increased its displacement to 6.7 liters (408 cubic inches). The 6.7 ISB had an increased cylinder bore (4.21 inches or 106.9 mm) and piston stroke (4.88 inches or 124.0 mm). The market wanted a new engine for medium-duty trucks and buses, and the ISB 6.7 engine became the answer for that. At that moment, it was outdated and depleted the limits of possibilities for improvements in terms of fuel consumption and emissions. Its predecessor, the ISB 5.9, has been produced almost ten years.