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Newb exhaust brake Question

947 Views 7 Replies 7 Participants Last post by  TexMexCB, 
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A good buddy of mine told me that if i use my exhaust for everyday driving that within 3 to 4 months it will screw my engine up enough to where i will have to get it replaced. Is that true?


Fannin
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antwan718
The exhaust break works by making the space for the exhaust to exit smaller creating more backpressure causing the engine to bog down. It WILL cause the turbo to run hotter, as well as kill your MPG's if you like to coast to a stop from lights. For the most part it should be ok though it may get your IAT/MAP sensor dirty.

If you do want to run it all the time, you probably will want to get a pyrometer installed tapped prior to the turbo inlet.

Fill out your sig too so we know what you got under the hood.
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dieseltech
If You Have A 6.7l Run The Exhuast Brake All The Time!!! Will Not Hurt Your Mileage When Down Shifting With The Exhuast Brake!! When You Down Shift You Are Not Using Any Fuel!! It Kills The Injector Pulse Width And You Are Using The Wheels To Turn The Engine Not Fuel!! Its Not Going To Dirty Anything Up More Than If You Dont Use It!!
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C
The exhaust break on the 5.9 would cause the sooting of the IAT and MAP sensors because it would blow back exhaust into the manifold. The 5.9 still fueled while the EB was in operation - at least mine did.

On the 6.7 the EGR creates a "protective soot crusting" so there is no need to worry about the exhaust break doing the same. :) Also, I believe the 6.7 EB will not fuel during operation, so if the EGR is somehow missing, you should be better off than you were in the 5.9 days.

If I'm not mistaken, the egts will actually drop when the EB is applied for breaking power. Its when you are at idle that the EB raises EGTs.

I use my EB every day, if only for a couple of times. It keeps the nozzle moving freely so things dont bind, and keeps the impeller somewhat clean. There might be some additional RPM on the turbo, but I think oil prevents any wear on the bearings.

Sadly, what kills the engine on the 6.7 are the emissions components and the active regen cycles. Although there are some folks with 140k + on their stock 6.7s that may beg to differ.
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C
Dieseltech's right on all other accounts, but:

If you are not accustomed to an EB, it can hurt your millage. Some folks don't understand throttle control and therefore will needlessly apply the break. Also, the converter is always locked putting more drag on the driveline.
Coasting allows you to travel without burning the additional fuel. The EB does not allow you to coast, and therefore you use more fuel when you accelerate back to speed.
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Compcowboy
Run it all the time, it will be fine. Just dont let 100% off the throttle and it wont engage yet you can still coast.
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ynots57
coal400 said:
Dieseltech's right on all other accounts, but:

If you are not accustomed to an EB, it can hurt your millage. Some folks don't understand throttle control and therefore will needlessly apply the break. Also, the converter is always locked putting more drag on the driveline.
Coasting allows you to travel without burning the additional fuel. The EB does not allow you to coast, and therefore you use more fuel when you accelerate back to speed.
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about the same with using the wheel brakes. when you slow down you eventually have to get going again
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TexMexCB
I have been running mine everyday since i bought the truck in october of last year. I have 25k on the clock and it is still going strong like cowboy said let off just a little and it won't engage:thumbsup
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