Roperteacher

Hey there 6.7 owners. Can anyone tell me if the 6.7 owners manual states to use the Exhaust brake ONLY when towing? Not daily driving? I had a turbo replaced on my 5.9 under warranty and my new one is seeping just a tad. A very reputable dealer told me that I should only use the PAC BRAKE when I am towing... I just wondered if the 6.7manual said the same as both brakes operate in similar ways, Thanks!

RiddlerLS1

the only thing similar about them is that they create exhaust back pressure against the motor. Otherwise you are talking about 2 completely different turbos, which is what this is about correct?
You are aware that the "exhaust brake" on the 6.7, is just the Variable geometry turbo closing correct? Just checking.

coolbreeze

Check with Pac Brake on your situation. I ran a BD brand brake for over a 100,000 miles, towing or not, and no problems.

ddestruel

likewise no problems and my pac brake is on the second vehicle and was used over 200k miles without any turbo issues towing or not

Roperteacher

Yea, I got it all ironed out. ANd nope, I did not know the Exh brake on the 6.7's was different. Thanks for the education!

cbrahs

copied and pasted from the owners manual of a 6.7

DIESEL EXHAUST BRAKE (ENGINE BRAKING) –
IF EQUIPPED
The exhaust brake feature will only function when the
driver turns the exhaust brake switch to the ON position.
Once the switch is in the ON position and the vehicle is
moving faster than 5 mph (8 km/h); the exhaust brake
will automatically operate when the driver removes
pressure from the accelerator pedal. Exhaust braking is
most effective when the engine RPM is higher. The
automatic transmission has been programmed to downshift
more aggressively when the exhaust brake is enabled
to increase brake performance.

Do not use the Exhaust Brake feature when driving
in icy or slippery conditions as the increased engine
braking can cause the rear wheels to slide and the
vehicle to swing around with the possible loss of
vehicle control, which may cause an accident possibly
resulting in personal injury or death.


NOTE: For optimum braking power it is recommended
to use the Exhaust Brake while in Tow/Haul Mode.
The purpose of the exhaust brake (engine braking) feature
is to supply negative (braking) torque to the engine.
Typically, the engine braking is used for, but not limited
to, vehicle towing applications where vehicle braking can
be achieved by the internal engine power, thereby sparing
the mechanical brakes of the vehicle.
Benefits of the exhaust brake are:
² vehicle driving control
² reduced brake fade
² longer brake life
² faster cab warm-up.
The exhaust brake feature can also be used to reduce the
engine warm up time. To use the exhaust brake as a
warm-up device, the vehicle must be moving less than 5
mph (8 km/h), the exhaust brake switch must be in the
ON position, and the coolant temperature must below
180°F (82°C) and ambient temperature below 60°F (16°C).

Harvie

I have used e brakes on all my trucks and engage it all the time, average mileage for brake work is over 120K + miles with fulltime use of e brake.