Warm up engine before using EB?

[AHarris]

I've noticed the engine sounds better if I let it warm up before I turn on the EB. If I turn it on cold the engine is a lot nosier at idle until it gets warmed up. Has been like this since truck was new. Normal? I use it all the time (before using the service brakes). Do you guys turn it on at start up or do you let the motor warm up first?

 

[Simplysmn]

I start truck and hit EB button right after that

 

[InfernoB]

Helps warm it up faster.

 

[tempforce]

factory bulletin says to engage the e-brake upon start up. for quicker warm up.

after the engine gets to operating temp the e-brake returns to normal unloaded position at idle. so less noise when warm.

 

[Devan Manis]

I don't own a 6. 7 but warming it up with the exhaust brake on would load the engine more and cause it to work harder and that may be the reason for the extra noise.

 

[jtwcummins]

The exhaust brake acts the 'heat riser' on older gas engines exhaust manifolds. It keeps exhaust from free flowing out the tail pipe keeping heat in until the Coolant temp rises to a predetermined level by 'closing a flapper' on the exhaust. The EB on the 6. 7 is the Variable turbo and not a flapper. Engine sounds weird at idle since the EB restricts exhaust. My 97 with the banks EB really sounded strange idling cold.



Start engine then turn on the EB. Warms up faster and helps keep soot out of turbo.

 

[AHarris]

Thanks guys, I'll run that EB right at start up.

 

[RVTRKN]

That is one of the benifits of an EB, I never turn mine off, but on a C&C the EB button never turns off unless you push the button to turn it off. The reg pickups you must engage it every time you start the engine, if you want it on all the time.

 

[JTsokalas]

Yooper,

As the others have already explained that's the e brake making that noise and it will shut off at idle once warmed up.

Interestingly though when I drive on the highway, my mileage never seems to go over 18 or so on the overhead with the e brake on, so I turn it off when I go anywhere far. Then it will go up to 20 or 21. Hand calculated I still haven't gotten much better than 19 on the highway.

While on the subject of warming up, on the highway when cold, I'll sometimes just keep the truck in fourth gear until the temp gauge hits 200 and then I'll shift it into fifth and then sixth. It seems to decrease my regens, and also keep my mileage up. I know it sounds a bit weird, but it seems to do the trick.

The times I just hit the highway cold, my overhead sometimes drops down to about 13 or so.

I've got 26,000 on it so far and I'm still trying to figure it out.

Be careful,

John