Engine/Transmission (1994 - 1998) exhaust brake vs cold warmup

[RNoland]

a guy was telling me that with a exhaust brake on at a idle it would help with a cold wheater warm up is this true and would doing this be harmful to the motor?

 

[Moose Truck]

I know of several CTD owners w/ Exhaust Brakes and they do warm up the engine faster. You would not pull power with it on, and most controlers shut it off once the engine warms up. Moose00

 

[Joe G.]

What year is your truck? The earlier trucks don't control the exhaust brake with a controller. It's controlled with a fuel pedal switch. Regardless, it won't hurt your engine to warm it up with an exhaust brake. If fact, that is a LOT better than letting it idle cold.

 

[McLaughlin]

Not sure how much faster the truck warms up but I know the Ebrake raises my EGTs about 200 degrees F at idle. The way my Pac Brake is set up, any time the accelerator is pressed, the exhaust brake is disengaged. Only thing I would suggest is that if the brake is on and you are going to turn off the truck, turn off the brake so the EGTs can drop more before you actually shut it off.

 

[ScottLewis]

The '06 with Jacobs e-brake uses the brake to warm up at idle. In fact the brake remains on at idle, stopped, until the engine reaches operating temperature. It's apparently safe for the transmission since DC has set up the ECM to operate the brake just that way and it took them a looong time to approve it. I also used the e-brake on my '98 with the throttle switch, to warm up when cold.



Dan

 

[tgordon]

I have talked with some semi drivers and they will turn on the jake to accomplish the same task. I use to get a good chuckle though when the neighbor would forget to turn his off and try to take off with loads of grain. That is one sound you will never forget.

 

[Woodenhead]

I have talked with some semi drivers and they will turn on the jake to accomplish the same task. I use to get a good chuckle though when the neighbor would forget to turn his off and try to take off with loads of grain. That is one sound you will never forget.

I always thought if you operated a Jake while idling it'd kill (stall) the motor, meaning a real Jake brake not our exhaust brakes. I use mine all the time in the winter to warm up the truck. When combined with a winter grill cover and a high idle setup it'll warm up the cab nice and toasty in about 15-20 mins in temps way below 0.



Mike

 

[dtygart]

Real jakes will kill the engine at idle, that's why there is a clutch switch in addition to the fuel switch.

 

[BigEasy]

my 92 Pete with a 3406B 425 Cat would spin the engine backward if you left the Jake on at idle... the first time I saw black smoke come out of the Vortox air cleaners, I about had a heart attack!

 

[oneshotkyle]

I have talked with some semi drivers and they will turn on the jake to accomplish the same task. I use to get a good chuckle though when the neighbor would forget to turn his off and try to take off with loads of grain. That is one sound you will never forget.

there is a BIG difference from exaust brakes to jake brakes. exaust brakes are mounted on exausts and create back pressure. jake brakes run off oil pressure under the valve cover and create compression internally on the engine. there is no such thing as a true jake brake on a 5. 9 cummins.