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Like people, engines need to breathe. While parts like turbochargers, which force more air into the engine, may get a lot of attention — exhaust parts are equally important. If you can’t breathe out as well as you can breathe in, you’re in a lot of trouble. So your 6.7 Cummins exhaust should get a little attention. The main route out for exhaust gasses is the 6.7 Cummins exhaust manifold which is attached to the engine block, and a 6.7 Cummins exhaust manifold gasket is also used to ensure an airtight seal. +Read more
Heat is the biggest enemy of the exhaust manifold, which deals with hot gasses constantly and may have to grapple with various other environmental factors. So if you’re planning a 6.7 Cummins exhaust manifold upgrade, make sure it has an expansion joint as this greatly reduces the risk of it cracking.
The exhaust can also be used to slow an engine. A 6.7 Cummins exhaust brake slows the engine by stopping air from exiting. The gasses build up in the exhaust manifold and cylinders and are compressed by the pistons. As the gasses can’t be re-ignited, the energy required to compress them simply slows the engine.
The exhaust brake on a 6.7 Cummins is particularly useful in slowing a heavy vehicle like a truck when it’s going downhill. If your truck is turbocharged, the exhaust gasses will be routed through the turbine, before heading through a 6.7 Cummins downpipe on their way back into the exhaust system.
An often overlooked but vital part of any exhaust system is the Cummins DPF differential pressure sensor. The diesel particulate filter (DPF) sensor measures exhaust back pressure and can trigger a process to clear particulate matter from your vehicle’s exhaust filter.
Things like poor fuel economy, high engine temperatures, and very dark to black exhaust gasses can indicate your DPF sensor is failing and should be replaced. If a sensor fails and isn’t replaced, both the DPF and the engine could be severely damaged.
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