Leaving Diesel Run

DanTheRVMan wrote:

wolfe10 wrote:

2gypsies wrote:
We found that by the time you slowed way down entering a campground and then drove to your spot and parked, that was sufficient time for shutting down.

The same goes for when you leave, have everything stored THEN start it up, pull in the slides and by the time you get to the highway you're good to go.

EXACTLY the same concept as on start-up. Common sense is needed.

As you say, if in a CG and you are going to drive out of the CG and a mile or so at low speeds "you are free to move about the country" as soon as air pressure is built.

After spending the night at a Flying J at the entrance ramp to the freeway, then idle (high idle-- like 1000 RPM please) until engine coolant temperature is 150 degrees F or so.

There is a reason that there is something on top of our NECKS.

I find engine to hot to turn off when I get to a fuel pump many times even though slowed way down entering truck stop. How long it takes to cool to 180F varies a LOT. Similarly rest areas for lunch. Shopping stops, etc. It is not as simple as CG example above

A good guideline of time or temp for shutting off would help many imo. I use temp

Air up and good to go I agree with. What surprised me was camp frieghtliner said no full throttle until 180 F also (do not ask me to defend the basis for this requirement I'm just repeating frieghtliner recommendation). I hit free way on ramps below 180 F lots of time

I use the EGT temperature as a guide when to shut off. I like to see it below 450 before shutting down. My water temperature seldom goes above the thermostat regulated temp, unless pulling a long hill.
Bill

Each engine is different.
My old 2-cycle Detroit doesn't need much of warm up. I have quiet electric compressor for airing up and in California weather I drive my coach few seconds after starting the engine.
My 2007 Powerstroke in pickup has electronic controls that even at 100F make the engine sluggish and will hold low gear for a mile.
I newer observe the warm up for moving. Just be gentle with throttle.
Even living in 4 seasons I would drive my cars right after starting even at single digits temperatures. Old carburetor engines would hesitate when cold and gas pedal was pushed, so I would start rolling on idle if the situation allow.
Engine under the load warms up much faster.
If you can't risk slow rolling with cold engine, turning headlights on while idling will speed up warm up.

wolfe10 wrote:

2gypsies wrote:
We found that by the time you slowed way down entering a campground and then drove to your spot and parked, that was sufficient time for shutting down.

The same goes for when you leave, have everything stored THEN start it up, pull in the slides and by the time you get to the highway you're good to go.

EXACTLY the same concept as on start-up. Common sense is needed.

As you say, if in a CG and you are going to drive out of the CG and a mile or so at low speeds "you are free to move about the country" as soon as air pressure is built.

After spending the night at a Flying J at the entrance ramp to the freeway, then idle (high idle-- like 1000 RPM please) until engine coolant temperature is 150 degrees F or so.

There is a reason that there is something on top of our NECKS.

I find engine to hot to turn off when I get to a fuel pump many times even though slowed way down entering truck stop. How long it takes to cool to 180F varies a LOT. Similarly rest areas for lunch. Shopping stops, etc. It is not as simple as CG example above

A good guideline of time or temp for shutting off would help many imo. I use temp

Air up and good to go I agree with. What surprised me was camp frieghtliner said no full throttle until 180 F also (do not ask me to defend the basis for this requirement I'm just repeating frieghtliner recommendation). I hit free way on ramps below 180 F lots of time

Off topic but appropriate. As a retired engineer and a former turbo charged Audi (gas) owner I can assure you that after many premature turbo failures, AudiAG installed an electric after run turbo coolant circulation system which also ran in conjunction with the electric radiator fan. Promptly, premature turbo failures dropped to close to nil. That was back in the days (early 80's) where turbos were the newest latest greatest thing and a learning curve needed to be established. Heck, back then even high performance snow skis were labeled . . . . "turbo!"

Chum lee

The logic is that it won't hurt anything to let it idle for a couple of minutes and could save you expensive repairs over the long run.

A gasser with out a turbo should be idled for a few minutes after high way service, the exhaust manifolds are well served by cooling down gradually. Consider all the complaints regarding exhaust manifold leaks on forum.

Let them idle for a little while to cool down, too long and you could end up with wet stacking issues if you do it too often.

2gypsies wrote:
We found that by the time you slowed way down entering a campground and then drove to your spot and parked, that was sufficient time for shutting down.

The same goes for when you leave, have everything stored THEN start it up, pull in the slides and by the time you get to the highway you're good to go.

EXACTLY the same concept as on start-up. Common sense is needed.

As you say, if in a CG and you are going to drive out of the CG and a mile or so at low speeds "you are free to move about the country" as soon as air pressure is built.

After spending the night at a Flying J at the entrance ramp to the freeway, then idle (high idle-- like 1000 RPM please) until engine coolant temperature is 150 degrees F or so.

There is a reason that there is something on top of our NECKS.

We found that by the time you slowed way down entering a campground and then drove to your spot and parked, that was sufficient time for shutting down.

The same goes for when you leave, have everything stored THEN start it up, pull in the slides and by the time you get to the highway you're good to go.

Let it idle for five minutes. Even if it was a gas engine running a turbo I would let it cool down.
The only cooling to the turbo is oil. There have been some turbos with cooling jackets for coolant but even then you would let it idle a bi to cool down.
Every diesel engine in motor homes today has tubos, unless someone has sneaked in. Maybe someone is using superchargers but I don't know about it.
An older mh might have a Detroit 2 cycle 471 or 671.