What does exhaust brake do on Duramax?

Hence, the device is called an “exhaust brake”. Such a device almost completely closes the engine’s exhaust when the foot throttle is fully released, creating a pumping restriction to generate engine braking. It does this by placing a shut-off valve, called a “butterfly valve”, in the exhaust system.

How does the banks exhaust brake work?

That’s why exhaust brakes, such as the Banks Brake, have become so popular for such diesel vehicles. A Jake brake works by using hydraulic pressure to momentarily open the exhaust valve at the end of the compression stroke, venting off the compressed air into the exhaust system. That’s where all the noise comes from.

What year Duramax has exhaust brake?

GM and Ford have both added exhaust brakes for the 2011 model year, but they operate differently. GM’s Duramax diesel exhaust brake works like the Cummins. It’s activated with the push of a button in the center console.

Why do I need a brake system on my Duramax?

Even when a vehicle’s brakes are capable of keeping the vehicle from gaining unwanted speed downhill, such loads impose significant brake wear and leave little braking safety margin. And, sustained braking can cause overheating that will damage some of the braking system components, such as the brake rotors.

Why do you need an exhaust brake on a diesel?

The primary advantages to exhaust brakes on diesel-powered vehicles are that they provide engine braking to assist deceleration, help control downhill vehicle speed, reduce brake wear, reduce brake heat, and provide a greater braking reserve for the conventional brakes.

Are there exhaust brakes that don’t work?

Unfortunately, not all exhaust brakes are created equal. There are designs on the market that bypass so much exhaust flow that they provide little or no braking effect in some circumstances. Still other designs restrict exhaust flow in the open position, impeding performance during normal driving.