Hemiproduction
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From: AB
Truck: 2006 3500
Mods: 9
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11/2 12:05p
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what would be to the purpose of the 3 cyl warm up?
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MoparTechnician
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From: NE
Truck: 2002 2500
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11/2 4:46p
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3rd gens can`t 3 cylinder idle, only 2nd gens can. The 3rd gen autos have a manual high idle that kicks the idle up to like 1250 rpms, that has to be activated by the dealer.
warms the truck up faster, puts a load on the engine. Idleing (1000 rpms or less) a diesel espcially in cold temps causes the cylinder temps to drop so much that the fuel doesn`t completly burn, which inturns cause carbon build-up, it is extremly hard on 3rd gen trucks to idle them for more than a couple of mins.
mopar
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Kronic
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From: AB
Truck: 2003 3500
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11/6 11:23a
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Correct me if I`m wrong but I think the 3cyl warm up is only for VP44 engines. The CP3 engines idle themselves up to 1000rpm instead (not that it helps any, need to be at least 1250rpm to get any heat goin).
Kronic
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jakenbake13
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From: OH
Truck: 2006 RAM
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11/6 8:49p
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How come it is so hard on the 3rd gens to idle them? More or less what makes them any different than any other diesel?
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MoparTechnician
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From: NE
Truck: 2002 2500
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11/6 11:12p
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like I said earlier, ideling doesn`t build up enough heat because your not putting enough load on the engine to keep the cylinder temps up, this causes carbon buildup which can lead to major problems and I have seen many blown engines from this.
mopar
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jakenbake13
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From: OH
Truck: 2006 RAM
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11/7 7:35p
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I understand what your saying about not building up enough heat, and without spark plugs heat is pretty important. I was just more curious as if if the 3rd gens were different than lets say the 2nd gens, when you said " treat a 3rd gen or newer as if it had a gas engine" And I may be an idiot but everybody I knew "seemed" like they idled there diesels all day long. And for instance my dad who drives a street sweeper for the city idles his truck about six hours a day, being that when sweeping he rarely goes faster than 5mph. Im by no means an expert, im just stating observations.
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MoparTechnician
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From: NE
Truck: 2002 2500
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11/7 9:43p
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Your comparing apples to oranges, the newer diesels have tighter tolerances to meet stricter emission standards. Because of this as in the case with injectors you see a lot more go out from either high idle times (carbon) or poor fuel. Also, the CR cylinder head is so efficient at cooling, durning extended idle times, the cylinder temps drop way down. Extended idleing has been a problem on the 2nd gens also, there is a tsb about extended idle times causing the valve stems to gum up and not fully seat, which happens on the 3rd gens too. I have been warning people to not idle their trucks ever since 04. People thought I was just blowing smoke up their ass and didn`t believe me, well now a couple of years down the road they are starting to listen, even chrysler puts a thing in the owners manual to not idle the truck to extended periods of time. Look at what it does to the 6.7`s, it will completly plug up the emissions junk. Plus, whats the point of idleing the truck for more than say 3 mins? Its your fuel, your engine, I am just warning you because I have seen this happen many times and had to replace around 8 engines because of trucks with high idle times causing an injector to stick and washing down the cylinder walls.
Now comparing your dads rig to ours, like I said apples to oranges, most likely its an older diesel which can handle the low rpms that it deals with everyday, I was working on a 09 international truck today that had a idle engine shutdown button, I am kinda wondering if they are putting these on the trucks kinda like a turbo timer. I didn`t get to look into it because we were busy, but I wouldn`t be surprised to see stuff like this show up, espcially with the new laws against idleing.
mopar
mopar
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MoparTechnician
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From: NE
Truck: 2002 2500
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11/7 9:46p
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Here is a picture of an engine that I did about 3 years ago, if I remember right, the truck had over 30% idle time, which means 30% of its life is idle and yes chrysler does track this, anything over 20% is bad and if you are warned about it and continue to have a high number and have problems they can void your engine warrenty.
Here is a picture of my buddies truck that he bought, the truck had blow by when he bought it so we knew a engine change was the first thing to do.
You can see the carbon build-up on these next two pictures
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Triple T
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From: GA
Truck: 2000 2500
Mods: 29
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11/7 10:07p
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and I bet his sweeper is not idling at 5mph, most likely the rpm`s are still up higher enough to run all the hydraulics on the sweeper. Just has the trans set low for the low speed but the engine is still not idling.
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jakenbake13
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From: OH
Truck: 2006 RAM
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11/8 9:06a
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That is good info, and deffinetly what i was looking for. He used to drive big trucks, My fav was his kenworth t2000, and since then I have been hooked with trucks and cars and love learning more about them and there is always room to learn, and now i can relay this info to him, as we were discussing it yesterday. But thats what i meant about comparing the age of diesels and how they are made different, especially with the 2010 stuff coming.
Oh and his sweeper actually has two engines, the one that is for the truck( it used to be a straight box truck and a second, and if im not mistaken it is a john deere, much smaller but it is used for everything but powering the truck. And on another note, before my dad started with it, it was inthe shop a lot for new turbo, to my understanding the previous guy drove it hard and would immediately shut it down( the smaller deere). And dad told me yesterday that he almost rides the brake most of the day, people still dont clear the street when its their day to be sweeped and he has to weave cars.
And another question if you feel like answering it, what about when its cold out side and they have to leave it running( similar to ice road truckers) Is that gonna lead to premature failure? Talking more about the pickups, as i saw a few 3/4 tons on their with cummins (02-05) but lets say the semi`s too.
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jakenbake13
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From: OH
Truck: 2006 RAM
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11/8 9:07a
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When i said new turbo, i`m pretty sure it was just new bearings.
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