Is their any real mechanical reason why you have to "warm" up the diesel truck and if so what does the manual say Exactly?

You drive a diesel cold you will score a cylinder real easily. Diesel is so much hotter when burning the pistons expand fast then the cylinders then make contact and wreck the engine.


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I am idling my Cummins right now!


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I used to get irritated by a lot of stupid things others would do in my neighbourhood. I didn't end up hating on all of them though. Instead I worked hard and payed down my mortgage faster until I could finally afford to buy a small acreage in the forest away from so many people in close proximity.

If you live around tons of people, someone is always going to irritate someone else. Life is too short to let others get your goat.

Not to mention head gaskets on some of the older fords need to be babied a bit or you could end up with a big bill also

Head gaskets on all diesel trucks need to be babied. Most if not all have aluminum heads cast iron block, which expand and contract at very different rates. That’s why you should idle your diesel after pulling it hard or driving off the highway. Let it cool down and allow a nice even cool down so your head gasket don’t get pulled apart.


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My neighbour complains about everything! He complained about the guy down the street with a Christmas display up that played Christmas music. So of course he complained about my 5” straight piped diesel. I explained to him why I let it idle. He agreed that it was a good idea to why I did it then apologized for complaining


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I feel this ladies pain. Had a next door neighbour, renter, that worked for a large local paving company, and his wife and some other tool that lived there drove school bus. They'd park large diesel flatbeds and a couple of buses on the street in front of his house and let them run for 20 minutes every morning early. Diesel stink would permeate our house through open windows in the spring and fall and the noise from them firing up was obnoxious.

Rubes had the option to park the vehicles at their employers yard but were to lazy to drive their personal vehicles back and forth to get them.

I harassed them via calls to their employers the city and his landlord, and the second one of his back ends infringed on the legal limits to my driveway access the cops were involved. There were many times that it was dangerous for me to back out of my driveway onto the street because I couldn't see around these vehicles.

Short story is the jack handle finally moved out.

You want to idle large diesels for 15 - 30 minutes every morning, 24/7/365 and drive enough of them to require a parking lot? Move outside the city.

So now you're upset at a neighbour who requires something for medical reasons... I'm sure he'd rather not stink up his house so he uses his yard. Much like everyone doesn't want unnecessary damage to their diesels so they idle them.


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-10 this morning. Cummins on high idle for 10 minutes and coolant temp just barely reached 40 deg C. Took 15 minutes for oil temp to reach 40.

And that folks is why we have laws, common sense and common courtesy is not common anymore.

Huh, never heard that one. I was always told the reason for the cool down was for the turbo - the bearing on the impeller is cooled by oil flow so shutting down a hot unit will cook the bearing. It was recommended a minimum three minute cool down. True? Just what I was always told.
Yeah I could see someone complaining about straight pipes - thought they were illegal?

Lol

^^^ Totally agree.

There is 2 sides to everything.

Sure is nice when us humans and critters alike find that balance.

Don

glad both the neighbours have diesel trucks
mine will idle till the windows are clear enough to drive
cool down after working a diesel is for the turbo life
i don't shut mine down until the EGT's are below 400F

That is going to be a huge problem. Smelling skunk at all hours in your yard or home even if not smoking.

Hopefully people are thoughtful and use other forms instead that are not a strong a stink.

That explanation is hysterical, the pistons are in constant contact with the cylinder walls and tolerances are engineered in to allow for the coefficients of expansion of the engine part materials. Please,tell us more:sHa_sarcasticlol:


A cast iron engine block will not expand as much as an aluminum piston, so the premise that it’s not expanding as fast as the piston would not change regardless of whether the engine was warmed up for 2 minutes or an entire week. The aluminium will expand at roughly twice the rate of the cast iron, so the cast iron cylinder is machined to be the correct size for the expanded piston. There are even expansion rate differences between cast aluminum and forged aluminum pistons so those factors are engineered for as well. Your neighbor only accepted the explanation because he is clueless about engines. Anything more than 10 minutes of warmup is overkill and 5 minutes is plenty.

Exactly right.

Ohhh I don’t know... maybe my 25 years as a diesel mechanic might have something to do with it. I laugh at all you guys that say to only warm up your diesels for less than 10 minutes. One question I have for the guys that OWN a diesel and let it warm up for 7 minuets is: how’s your cost of ownership working out for you? What kind of downtime are you seeing?

I wonder how many cats that lady has....

Sure nice warming up 10 of our power units this morning.

All nice and toasty now on high idle.

Hope we didn't scuff a cylinder wall.

Warm is good as they run all day long in our winter conditions.
Ha. Even the Government trucks are idling this morning.

The pleasures of working out-doors is the best.

Don

I couldn't care less where they smoke their weed but she does. if I had a dick waking me every morning with his diesel on high idle I would spend a bit of time making his life unpleasant in one way or another. I guess the moral is , act like an ass and you will receive the same in return.

I agree, its going to be a huge problem because there is a certain subset of the population that lack will always be self entitled and will push every boundary.
Those types always ruin things for others.

Wait til there is an anti idling law ........

You mean neighbours with diesel trucks that don't own trailers or any other reason for owning one other than driving to work looking cool?

Add a timer for another few hundred and then to pay for install for heater and timer and you’re well over 2000.00

Ha!

You don't mean to imply that there are any of these gems in the lloyd area do you?

I'm about 20 mins NW of you and my neighbour has a late 90s dodge with dual 6" stacks coming up through the box. No trailer to be seen.

No idea on idle time though. It's not a daily driver.

There's a lot less around Lloyd these days my buddies kid lost his $90,000 truck 2 months after lay off UI cheques don't make those $1200 a month payments.

I wasn't making any judgements. I was just asking. Drove a diesel car in Europe and the rental guy said don't treat it special. I assume trucks were different. Likely the age and brand makes a difference.

I was curious to see what users thought.