Cummins questions

Hermes1 wrote:

spoon059 wrote:
If you leave the Cummins stock it will never allow itself to get too hot. It will defuel if temps ever got high enough. The only temp you need to worry about is turbo EGT's. The manual tells you to let the turbo cool down for a couple minutes after a hot haul. Generally for me, that means I just leave the truck running while I refuel and I leave the truck running while I disconnect the camper.

True but I seem to recall reading that after a heavy tow or haul, the drive into and through the campground to your site is enough to bring down those temps. Of course nothing wrong in doing as you suggest, but may not be completely necessary.

The problem with the campgrounds around here is you have to check in first before you can drive to your site.

sidewayzz wrote:
I have been trying to update my sig/profile can't figure out how. It is a 06

Something is wrong with the forum. I have been trying to update my signature for days and it just wont stick.

sidewayzz wrote:
Was wondering about the cool down period as well.My owners manual says 3-5 minutes after towing heavy. Seems a trip into campground would do that.

It will. I run a pyro on mine and simply driving through a CG always cools it down enough.
I have one place where I have to pull a steep hill at freeway speeds and then stop at a rest stop at the top of the hill. In that case it does take a good 5 minutes to come down below 300 degrees pre-turbo.
I don't think an 06 will defuel. That would have come along with the 07.5 model year and the 6.7L engine with all its gawd awful electronics.

I have been trying to update my sig/profile can't figure out how. It is a 06

spoon059 wrote:

ScottG wrote:
Yep, all normal.
I don't think an 01 will derate when too hot though.

Oops, I didn't see that, good catch!

His signature says 01. The post says 2006. I'm assuming he hasn't updated signature. The 06 I believe will defuel.

If you had an egt gauge, it would tell you that even coming off a hard uphill pull directly, in hot weather, within about 3 minute your egts will be back down to normal idle temps.
If you shut off hot at the pump for 5 min and then fire it back up, the horse is out of the barn.....no point, at that point.

Hermes1 wrote:
True but I seem to recall reading that after a heavy tow or haul, the drive into and through the campground to your site is enough to bring down those temps. Of course nothing wrong in doing as you suggest, but may not be completely necessary.

You are probably right, but its not worth the risk of damage to me. I would have to restart the truck and pull forward after dropping the trailer anyways. 25 cents worth of diesel fuel prevents the potential for thousands of dollars in repairs if I burn up the turbo.

Sometimes traveling down to Florida in the winter we will drive 8 hours down the interstate and pull into a campground right off the roadway. I'm sure my temps are still pretty high then, just like pulling off the interstate to refuel.

For the record, we have two small kids, so we don't pull into campgrounds any later than 8pm anyways. I'm not that jerk cranking a loud diesel at 11pm, waking up the entire campground!!!

Was wondering about the cool down period as well.My owners manual says 3-5 minutes after towing heavy. Seems a trip into campground would do that.

ScottG wrote:
Yep, all normal.
I don't think an 01 will derate when too hot though.

Oops, I didn't see that, good catch!

spoon059 wrote:
If you leave the Cummins stock it will never allow itself to get too hot. It will defuel if temps ever got high enough. The only temp you need to worry about is turbo EGT's. The manual tells you to let the turbo cool down for a couple minutes after a hot haul. Generally for me, that means I just leave the truck running while I refuel and I leave the truck running while I disconnect the camper.

True but I seem to recall reading that after a heavy tow or haul, the drive into and through the campground to your site is enough to bring down those temps. Of course nothing wrong in doing as you suggest, but may not be completely necessary.