turning off engine after running all day?

bubbanbrenda · Jan 10, 2014

that is with the fan on

SHO-TYME said: ↑

Flip your fan ON, it will help cool the Air Charge cooler on the front and help in cooling off the turbos. Also remember, you have the A/C condenser on there creating heat and that air is pulled back into the Air Charge cooler. As soon as I stop, I turn my fan on, it helps keep the truck cool and makes the A/C work better.
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bubbanbrenda · Jan 10, 2014

Yes pyro not water

skateboardman said: ↑

I hope you aint talking 300 on the water, lol
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magoo68 · Jan 10, 2014

dd15 owners manual states allow engine to run between idle and 1000 rpm with no load for 5 minutes ..after doing so many turbos and starters on warranty i guess they changed from no cool down needed policy

deming807 · Jan 10, 2014

281ric said: ↑

after running all day , do you let the enging idle for a little bit before you shut it off?
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I really like what Rawze said once:

When you are pulling a heavy load, or climbing a hill, everythingon the exhaust side of the engine heats up quite a lot, like the turbo, exhaust
manifold, piping, EGR cooler, and anything else mounted to the exhaust system
or engine block. When your engine is running, the coolant wicks away the heat,
keeping everything from overheating. If you have just climbed a hill, or are using
a lot of torque against a strong headwind or slight incline, and you are heavy,
some of these components, like the turbo, and exhaust manifold, can easily get
upwards of 800+ degrees. If you shut your engine off when the components are
this hot, the coolant will stop flowing, and the extra heat has no where to go. That
heat will bleed back into the engine block possibly causing the engine and turbo
to overheat even though it is switched off. Most often, your turbo is the one to
suffer the most from this. The oil that keeps the blades spinning carbonizes inside
the bearing, shortening its life considerably. How you prevent this, is that when
you have to stop at the top of a hill, or pull off when the engine has been working
hard, is to let the truck idle for a minimum of 3 to 5 minutes. This keeps the
coolant flowing and allows the turbo, EGR cooler, and exhaust manifold
temperatures to balance back out again. Drivers of newer trucks have gotten so
used to shutting off their engines as soon as they stop, that several of the turbo
manufactures now list this as one of the biggest causes of premature turbo failure.
This is also one of the theories sometimes used for repeated EGR cooler failures.
An example of this overheating problem can be seen quite often in the newer
DD15 Detroit engines. The starter is located on the exhaust side of the engine near
these components, and it is not uncommon for the starter to get hot enough to
overheat after the engine has already been shut down, causing the truck not to
want to start sometimes for 30 minutes up to as much as 2 hours. I have seen
many drivers stuck at fuel islands with a Cascadia that will not start, giving no
indication as to why. Half an hour later, when the tow truck arrives, it starts right
up again, making a lier out of the driver and wasting a service call. Ironically,
many Detroit dealers and mechanics will refuse to believe that this is the cause,
and, quite often, the truck ends up in the shop several times before the starter gets
replaced and the problem gets solved. What does all this mean to an owner-op?
Well, if your truck is very hot, or overheated, let it idle for at least 5 minutes so
that the temperatures can balance out. If not, you may just end up regretting it
later.
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Taking a few extra minutes to lookaround the truck stop parking lot, when there is extra spaces, you will usually find
the spaces furthest away from the C-store are usually out on the edge of the paved
areas. Nosing in toward a grassy or shaded area will definitely help. The edges of
a parking lot are much cooler in the summer than the center, near the C-store.
Also, when the sun goes down, it will be the first areas to cool off. This will help
reduce the fuel needed by allowing you to shut your truck off sooner. Also, on
almost all trucks, if you open the hood, the inside of your cab will cool off, and
stay cooler much better. The heat from your engine has no where to go when the
hood is down, pushing it straight toward your cab and down under the truck.
Opening your hood for the first hour or two of your rest break can help tons,
especially if you want to shut off your engine later.
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SHO-TYME · Jan 10, 2014

bubbanbrenda said: ↑

that is with the fan on
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Then you've got something going on, it shouldn't take 20 minutes to cool down. What are you running for mufflers?

jdiesel3406 · Jan 13, 2014

When I pull into the yard I creep to where I need to go, and I reverse in idle. I finish my paperwork, logs, and pickup around the truck, by then its cooled off and good to go. I don't care how new or old the truck is, I always let it cool down.

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