And if you buy a new 6.0 PSD, that comes from the factory.

 

Yeah....that. I don't want that to happen. Will 1200 RPM's prevent wetstacking?

 

I think the best way is to monitor turbo inlet temp* (folks call it EGT here), and thought that the magic number was 300F; and thought that 1200rpm was a good number to maintain that magic number if you don't have guages.

Maybe I'm thinking to much. TGIF

* the auto censor would have caught that temp for me

 

Didn't anyone read the bottom part of #4? ??? It said after idling for 6 hours in a Chrysler you need to (among other things) run the engine at 3500 RPMS for two minutes before shutting down. Doesn't anyone else have a problem with that? Isn't that well above the red line? What's the deal? ???

 

You can run your engine that fast; I won't. I thought the 140F engine temp was key.

 

[quote author=RockMonkey link=board=20;threadid=18143;start=15#msg170040 date=1060365069]
Didn't anyone read the bottom part of #4? ??? It said after idling for 6 hours in a Chrysler you need to (among other things) run the engine at 3500 RPMS for two minutes before shutting down. Doesn't anyone else have a problem with that? Isn't that well above the red line? What's the deal? ???
[/quote]

That was for NON Chrysler. For Chrysler it just said to run at high idle for 5 minutes.

 

Oh wait....you're right....but I think they have it backwards. I'm certainly not doing that to my engine.

 

I am glad that this was brough up. I use a 3500 watt power inverter to run equipment on my job sites. I tend to sit in one spot about and hour at idle then move 800 feet to half mile and do it all over again. Some Jobs require 10 to 12 hours to complete others go really quick. I am not so much worried about the quick jobs but the long ones I have been concerned about messing up the enging. I have been using a generator untill I could get this question answered. I think that I also read in the owners manual to not let the engine have prolonged Idle times untill it is broken in.
I am only at 2600 miles and a month in to my truck so I am not there yet but will be soon enough ;D

 

The 140 degree thing comes from the fact that the 24v engines' valve train itself runs so cool that there is not enough heat generated at idle to keep varnish from building up on the valve stems in cold weather. in the 2nd gen trucks, DC addressed this by building in a high idler feature that sensed a bunch of operating parameters (air intake temp, coolant temp, tranny position, vehicle stationary, etc.) and raised idle speed to 1200. it even shut down three cylinders under some conditions. This functionality came out late in the 2nd gen life (2002 I believe) and involved a re-flash of the ECM. It was targeted at warranty repairs for bent push rods for trucks operated in very cold climates. Basically, if you are at curb idle, the ECM protects your valve train for you by insuring that it (the valve train) stays above the critical temperature, which has been correlated with a 140 degree minimum coolant temp.

The way it works is this: If coolant is below 140, and air intake is below 40 degrees F, then the idle speed ramps up to 1200. after the ramp, if the air intake is 32 degrees or below, and the coolant temp is still below 140 then three cylinders shut down. there are more details listed in a TSB. Don't quote me on the absolute numbers; I'm going from memory here.

Anyway, I believe the 3rd gens have this kind of a feature already, although I've not heard about any cylinder shut down.

So Hoss you know you don't have a cold weather problem. I'm interested to know what Cummins says about extended warm idle. I do know that they (DC) can get a data dump from the ECM telling them how many total hours idle you have, and that they do frown on it. unburned fuel in the crankcase is probably your enemy here.

If your routine requires extended idle periods, then I suggest you go get some oil analyses done and adjust your drain interval accordingly. learn the conditions that might require a very short drain interval.

 

Till it runs out of fuel!!!

 

I'm still waiting for an answer back from Cummins on this. When, or IF, I get one, I'll let everyone know what they say.

 

Yesterday I said it could idle till it ran out of fuel, and it can. But, I believe the book says something about, Don't idle for extended periods. Problem is, As I remember it, when they idle the cylinder walls tend to get crapped up with coking. I'm just trying to remeber back, this is an old subject, been asked and answered many times.

My old 95 4x4 had 250K miles on her and I used to let that thing run at high idle for hours. High idle being 1500RPM. Never had a lick of trouble. All the rams with CTD I have owned over the last 10 years have some serious idle time on them and have yet to have anything go wrong or notice any problem.

Now the flip side of this coin is, idling is burning fuel, causing wear on the motor and just shouldn't be done, in my opinion, unless you need the heat in the winter or some other really good reason. All those big rigs idling all night at truck stops are running for either heat or AC and the majority of them are not owner operators. the rigs are company trucks and the drivers could care less about the maintenance schedules.

Unless you know for a fact that you are going to try and drive this truck 3 or 400,000 miles. I wouldn't worry about it. If you want to idle, then let it idle. Probably won't hurt anything.

2 cents

 

cummins/DC will recommend against it, and will use this data from the ECM if you get into a warranty dispute. As I say, as long as you're not idling cold, I'd do oil analysis and adjust the drain interval appropriately.

 

I'm with you on the heat and AC there Mr. Kennedy. I don't think I'd want to drive 9 or 10 hours and then sleep in a hot or cold sleeper. Doesn't sound very restful.

Like I said, I have let my CTD idle for many hoursover the years and really haven't had any problem. As far as warranty goes. DC is like anyone else. If they see any opportunity avoid honoring the warranty they will try it. I also agree with you they will have a hard time voiding it based on hours of operation. afterall, the motor is supposed to run, right?

 

[quote author=mymaur link=board=20;threadid=18143;start=15#msg171700 date=1060729004]
Yesterday I said it could idle till it ran out of fuel, and it can. But, I believe the book says something about, Don't idle for extended periods. Problem is, As I remember it, when they idle the cylinder walls tend to get crapped up with coking. I'm just trying to remeber back, this is an old subject, been asked and answered many times.[/quote]

Seems to be considerable interest considering it's been asked and answered many times.

Anyway...if it's at 1200 RPM's is that technically considered an IDLE?? I'm not talking about just letting it idle. I'm talking about letting it idle at 1200 RPM's with my high tech high idler.