Do you do a warm up & warm down of your moho engine ?

[stuartholmes]

When I was taught to drive, it was all about minimising wear & tear on the vehicle, ie drive smoothly, stop smoothly, anticipate & reduce/increase speed & thus wear & tear on many parts of the vehicle, by acting in a mechanically sensitive manner
My self employed driving instructor was a bit of a stickler for not in any way causing excessive running wear on his vehicle, let alone damage!! So that is why I drive like that

It's also better for your passengers, which is another reason why I taught my family to drive this way.
I think the current crop of instructors have grown up in vehicles that are so engineered that drivers are more isolated from the metalwork with the unfortunate but inevitable consequence of being less mechanically sympathetic.

 

[L' Hobo]

It's also better for your passengers, which is another reason why I taught my family to drive this way.
I think the current crop of instructors have grown up in vehicles that are so engineered that drivers are more isolated from the metalwork with the unfortunate but inevitable consequence of being less mechanically sympathetic.

Is that not inevitable, with modern vehicles, one no longer spends long sunny Sunday afternoons under the vehicle with a grease gun or under the bonnet checking the plugs and points.

Everything now has become too technical for the ordinary driver to fix unless they have a degree in, either computers or electronics!
These are both executed AWAY from the vehicle, not laying underneath discovering another little bit about how it works.

I've met modern drivers who have NEVER even opened their bonnet!

 

[meanders]

True though how the fill screen wash etc between services I don't know.

 

[L' Hobo]

True though how the fill screen wash etc between services I don't know.

A lady I know, takes it into a garage or leaves it until her next MOT service.

 

[stuartholmes]

True though how the fill screen wash etc between services I don't know.

Is that not inevitable, with modern vehicles, one no longer spends long sunny Sunday afternoons under the vehicle with a grease gun or under the bonnet checking the plugs and points.

Everything now has become too technical for the ordinary driver to fix unless they have a degree in, either computers or electronics!
These are both executed AWAY from the vehicle, not laying underneath discovering another little bit about how it works.

I've met modern drivers who have NEVER even opened their bonnet!

Interesting that this should come up today - my car ownership goes back to the days of starting handles so I spent plenty of time under the bonnet if not under the car but times move on & I can't even remember the last time I changed a tyre.

We bough a new-to-us 2007 Mini this Eastertime & today a new yellow warning light flashed at me so I went to the instruction manual & find it tells me that tomorrow I need to lift the bonnet for the first time ever and add washer fluid... Wish me luck!

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[Landy Andy]

View attachment 953871

It’s a Modine oil cooler. It initially will heat the oil and thin it, but at running/racing temps it will be cooling the oil.

Modine Oil Cooler | Ford Cosworth 2WD

Modine Oil Cooler Includes 1 x Modine Oil Cooler Fits All Cosworth YB

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[St3v3]

It’s a Modine oil cooler. It initially will heat the oil and thin it, but at running/racing temps it will be cooling the oil.

Modine Oil Cooler | Ford Cosworth 2WD

Modine Oil Cooler Includes 1 x Modine Oil Cooler Fits All Cosworth YB

shop.grahamgoode.com

The main function is warming the oil. If it wasn't it would be an air/oil cooler

Unless on track I never saw oil temp higher than water temp.

 

[suavecarve]

J m too tight to even consider warming an engine, and as for cooling one down, I turn engine off beforehand and coast into the aire

Luckily if I overshoot it Paula gets out to save the brake pads overworking

 

[L' Hobo]

It’s a Modine oil cooler. It initially will heat the oil and thin it, but at running/racing temps it will be cooling the oil.

Modine Oil Cooler | Ford Cosworth 2WD

Modine Oil Cooler Includes 1 x Modine Oil Cooler Fits All Cosworth YB

shop.grahamgoode.com

That's the reason, most are called a heat 'exchanger' because it changes from a heater to a cooler.

 

[PaulW2]

It would be interesting to see the stats on this.

Start engine, drive off, stop, switch off. Just like everyone does in a car and just like every commercial driver does.

Average life expectancy say 200,000 miles? What is added by the warm up/cool down routines, or subtracted by not doing them?

And how many of us ever put 200,000 miles on a motorhome engine?

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[The Wino]

It would be interesting to see the stats on this.

Start engine, drive off, stop, switch off. Just like everyone does in a car and just like every commercial driver does.

Average life expectancy say 200,000 miles? What is added by the warm up/cool down routines, or subtracted by not doing them?

And how many of us ever put 200,000 miles on a motorhome engine?

Not just that but how many are going to ever get near the mileage before they sell it for it to make any difference

 

[B-JandBella]

Thing is we’re talking about a medium duty diesel engine in a van and not a big heavy industrial engine in a piece of equipment that holds and struggles to dissipate heat or a truck engine working at the verge of its duty cycle for long periods.

Each to their own and all that and if people sleep better in their beds for a bit of cool down then fair play but it’s not standard practice in road transport and neither has it been for the last 20+ years.

As already said you won’t ever put a mh engine under the loads that the average Amazon/DHL/any parcel company you can think of driver will on a daily basis.

No disrespect Daffy64, but I think you'll find that new vehicles are recommended to be "run in" by the manufacturer.

 

[B-JandBella]

In actual fact the thing that's the worst thing to do with a rebuilt aeroplane engine is treat it too gently it needs variations in power and has a different oil for the running in period. The explanation I heard was that the machining wasn't to a final polish and running in at a slow steady speed can lead to glazing of the bores requiring another rebuild. Slow and steady isn't necessarily the kindest!

From aviation safety magazine

"The trick is to force the rings against the cylinder walls during the break-in process, minimizing lubrication. This is best accomplished by running the engine at high power settings, which generate the highest internal cylinder pressures, maximizing both ring expansion against the cylinder walls and friction"

Just the opposite of what people would expect. If modern engines are designed to be used out of the box with a full range of power settings being too gentle could be bad!

I'm glad I'm not driving my MH like a plane
Mind you, it is 23 years old so running in is not a problem.
If it was brand new, then I would still go with running in, if I was desiding on keeping it!

 

[Landy Andy]

The main function is warming the oil. If it wasn't it would be an air/oil cooler

Unless on track I never saw oil temp higher than water temp.

It is an “oil cooler”. That is what its name is.

 

[St3v3]

It is an “oil cooler”. That is what its name is.

No, it's a modine heat exchanger.

An air/oil COOLER would be more effective at cooling oil, doesn't add heat to an already struggling cooling system (think massive RS500 intercooler in front of the radiator) cheaper and more reliable. Why do you think that isn't fitted?

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[PaulW2]

Not just that but how many are going to ever get near the mileage before they sell it for it to make any difference

I remember this being a thing decades ago. Old tech, old oils, old church.

But it would be interesting to know the ‘official’ answer.

My suspicion is it makes no difference at all to longevity and that the recommendation is just to drive off.

I do have a car with more than 200k miles on (touch wood) and all I wait for is glow plugs!

 

[L' Hobo]

It is an “oil cooler”. That is what its name is.

Could we not be talking about 2 different things?
To me, your Mobile oil cooler reminds me of a similar thing on my 1989 VW T25TD, this sits between the block and the oil filter with the engines water running through it.

This helps warm the oil when cold and keep it constant temperature when warm.
The enclosed rear engine bay, sitting on top of a hot engine, is hardly the place I would put a 'cooler'?

If I wanted to cool the oil, I would fit an Intercooler at the front of my vehicle where the oil running through the pipes would be cooled by air.

 

[L' Hobo]

Could we not be talking about 2 different things?
To me, your Mobile oil cooler reminds me of a similar thing on my 1989 VW T25TD, this sits between the block and the oil filter with the engines water running through it.

This helps warm the oil when cold and keep it constant temperature when warm.
The enclosed rear engine bay, sitting on top of a hot engine, is hardly the place I would put a 'cooler'?

If I wanted to cool the oil, I would fit an Intercooler at the front of my vehicle where the oil running through the pipes would be cooled by air.

Just seen post #135 which explains it.

 

[L' Hobo]

I remember this being a thing decades ago. Old tech, old oils, old church.

But it would be interesting to know the ‘official’ answer.

My suspicion is it makes no difference at all to longevity and that the recommendation is just to drive off.

I do have a car with more than 200k miles on (touch wood) and all I wait for is glow plugs!

I think we are forgetting that these vehicles are sold worldwide.
As I said earlier about my old VW, it was produced to German Army Specifications and HAD to operate efficiently in steaming hot deserts and killer cold.
It can go ANYWHERE with the right preparation!

PS. This Army Spec can be a PIA sometimes because, once when I was lowering the flat underslung fuel tank, I found 4 fuel pipes going into it's top.
It was hell trying to get all 4 through their seals and holes when there is only a couple of inches between the wide tank and vehicle floor.

When later I asked an expert "WHY" , he told me that the 4x4 version has the same tank and can climb inclines up to 45% and fuel was needed at whatever angle.

This is still a record I believe?

 

[stuartholmes]

I think we are forgetting that these vehicles are sold worldwide.
As I said earlier about my old VW, it was produced to German Army Specifications and HAD to operate efficiently in steaming hot deserts and killer cold.
It can go ANYWHERE with the right preparation!

PS. This Army Spec can be a PIA sometimes because, once when I was lowering the flat underslung fuel tank, I found 4 fuel pipes going into it's top.
It was hell trying to get all 4 through their seals and holes when there is only a couple of inches between the wide tank and vehicle floor.

When later I asked an expert "WHY" , he told me that the 4x4 version has the same tank and can climb inclines up to 45% and fuel was needed at whatever angle.

This is still a record I believe?

Being able to cook & sleep in the van at 45% is of course an entirely different challenge.

(Not to mention washing of course because who washes in a war zone...?)

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[L' Hobo]

Being able to cook & sleep in the van at 45% is of course an entirely different challenge.

(Not to mention washing of course because who washes in a war zone...?)

We did, two little pieces of damp green towel. One for above the waist and one for below!

 

[Daffy64]

No, it's a modine heat exchanger.

An air/oil COOLER would be more effective at cooling oil, doesn't add heat to an already struggling cooling system (think massive RS500 intercooler in front of the radiator) cheaper and more reliable. Why do you think that isn't fitted?

Modine is a brand name, you are right that an external oil filter would be more efficient at cooling the oil but it needs air flow that isn’t reducing the air flow through the radiator and most importantly it isn’t controllable, you don’t want your oil cooled at -10’c under light load.

 

[Daffy64]

Could we not be talking about 2 different things?
To me, your Mobile oil cooler reminds me of a similar thing on my 1989 VW T25TD, this sits between the block and the oil filter with the engines water running through it.

This helps warm the oil when cold and keep it constant temperature when warm.
The enclosed rear engine bay, sitting on top of a hot engine, is hardly the place I would put a 'cooler'?

If I wanted to cool the oil, I would fit an Intercooler at the front of my vehicle where the oil running through the pipes would be cooled by air.

I’m probably being pedantic here but an (air cooled one anyway)intercooler sits in front of the coolant radiator and cools the intake air that has come out of the turbo on its way to the inlet manifold.

The cooler you refer to is generally described as an oil cooler (funnily enough) it will usually sit below or to the side of the radiator.

 

[Daffy64]

No disrespect Daffy64, but I think you'll find that new vehicles are recommended to be "run in" by the manufacturer.

They are and I don’t think I said any different,, if what I said comes over that way then that’s my bad..

 

[L' Hobo]

I’m probably being pedantic here but an (air cooled one anyway)intercooler sits in front of the coolant radiator and cools the intake air that has come out of the turbo on its way to the inlet manifold.

The cooler you refer to is generally described as an oil cooler (funnily enough) it will usually sit below or to the side of the radiator.

Of course, you are absolutely right!

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[gus-lopez]

True though how the fill screen wash etc between services I don't know.

They don't like the ++++here who don't even clean the dust from the screen

A lady I know, takes it into a garage or leaves it until her next MOT service.

3points & a 100 fine if empty.should be checked at every set of traffic lights.

Not just that but how many are going to ever get near the mileage before they sell it for it to make any difference

That isn't the point you are doing it for the engine & for the person you sell to. This is why many should not be driving if they have no mechanical sympathy & think it is a means of getting from A2B

The enclosed rear engine bay, sitting on top of a hot engine, is hardly the place I would put a 'cooler'?

My last MPV , a Kia Carnival (Sedona in UK) the heat exchanger is inside the front of the engine block accessed through a removal 9"x4" steel panel to which the stainless steel HE is attached .

 

[St3v3]

, you don’t want your oil cooled at -10’c under light load.

Absolutely.

Thermostats are available to cover that

 

[WillH]

Start up and move off immediately, if I've just left the autoroute or motorway I may idle for a minute to let the blower cool down, otherwise shut down. Also, if I move to the waste dump or similar, the engine is shut down rather than idling for the duration. Diesel engines love load. The only engines I've ever brought up slowly, or wound down slowly, have been 9000hp+ but they're a different beast altogther. I've had emergency generators of 1000hp that would cut in and reach full load in 12 seconds, from cold.

 

[Daffy64]

Absolutely.

Thermostats are available to cover that

In principle yes, but in practice it’s a very crude means of control and not suited to a modern engine.