Do you do a warm up & warm down of your moho engine ? (92 Viewers)

[dunnah01]

I just take it easy from cold to let everything expand to where it needs to be. I don't worry too much about getting the turbo cooled as it never gets to extreme temperatures

 

[Sleeveless]

Remember the old " Running in please pass" signs in the rear window of vehicles ? Always confused me as a kid....Having said that , modern production techniques and materials have vastly improved since then, reducing tolerances and therefore the expansion phase and the need for "running in" at all. So too has the film strength of synthetic lubricating oil , allowing much thinner oils to give greater protection, especially from cold start up, also making the first service at 1000/1500 miles obsolete . In terms of emissions , getting the catalyst up to operating temperature as quickly as possible is the aim nowadays , which means extended and unnecessary idling during warm up is not desirable. As for cooling down, the temperature tolerance of ( fully) synthetic oil and the use of Viton seals means the turbo and the oil within, can easily survive undamaged when engine is stopped.

 

[KevinTuplin]

It appears that there are some on here that know more than the experts at Caterpillar. During my fifty years of operating diesel powered heavy earthmoving equipment I have never come across any engine manufacturer that didn't require a run down cooling period before stopping the engine. On a lot of sites if the operator stopped the engine without allowing it to run on tickover for 5 minutes he would get his marching orders. Even now with todays modern engines I let my vehicles idle for a few minutes before stopping them as I have seen the premature results of not doing so.

 

[gus-lopez]

Whose recieved wisdom ? Where’s the evidence based research ?
This so far is purely anecdotal.
I’m open to facts ,
Interesting discussion tho

My last Kia Carnival(sedona) along with the transit before both had large yellow stickers, on the sun visors +kia also had one on the door stating run the engine for 2 minutes after stopping before turning off.
I always allow mine to cool & usually just before arriving anywhere I try to drive 'off turbo' with no huge amounts of acceleration.Kia was water cooled but this transit isn't.

Those were the days when you would see people at fuel stations lifting the filling pipe to get the last drop out!

I still do it & shake it.

On tick over all the air is still and after a short time the cooling fan has to come on.

Both my rad fan & ac fan start up initially then run to full speed & then drop back to slow.& are then controlled by the engine temperature. If one fan does not start then the ac will compressor will never start.

 

[Pausim]

If I was driving industrial machinery I would follow the manufacturers instructions. My Fiat instructions are.

“WARMING UP THE ENGINE JUST AFTER IT HAS STARTED Proceed as follows: drive off slowly, letting the engine turn at medium revs. Do not accelerate abruptly; do not demand full performance at first. Wait until the engine coolant temperature gauge starts moving.”

“SWITCHING OFF THE ENGINE Turn the ignition device to STOP with the engine idling.”

This is what I do.

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[barryd]

Does my nut in if you're parked next to an "idler" on an Aire or parking spot. These are commercial engines thrashed for millions of miles by white van man. Just turn the key, drive away / park up turn it off, open beer!

 

[WESTY66]

Does my nut in if you're parked next to an "idler" on an Aire or parking spot. These are commercial engines thrashed for millions of miles by white van man. Just turn the key, drive away / park up turn it off, open beer!

You forgot “hot turbo still spinning with no oil being pumped to its bearings”

Each one to their own!
There’s two sets of drivers in all walks of life
1, mechanically sympathetic
2, NON mechanically sympathetic

 

[jerryz]

It is well known advice in the Auto industry that after fast long run , Turbocharged engines should be idled for a minute to ensure oil flow to hot turbo bearings ,,,, to ensure long life especially on petrol Turbos

 

[Cookieboy68]

Anyone de-coked a petrol engine or ground in the valves lately?

Can't beat a bit of lapping

 

[HKF]

Some of these replies really do make me chuckle; there is a distinct lack of basic mechanical knowledge.

You must be having a right laugh at me, then, because I have almost zero mechanical knowledge. We can't all know everything. And just because I have owned many vehicles doesn't mean I should be knowledgable about them, just as I know nothing about my home plumbing or electrics

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[Sleeveless]

It appears that there are some on here that know more than the experts at Caterpillar. During my fifty years of operating diesel powered heavy earthmoving equipment I have never come across any engine manufacturer that didn't require a run down cooling period before stopping the engine. On a lot of sites if the operator stopped the engine without allowing it to run on tickover for 5 minutes he would get his marching orders. Even now with todays modern engines I let my vehicles idle for a few minutes before stopping them as I have seen the premature results

Makes a mockery of the modern stop/start engines then ....

 

[HKF]

It seems to me most motorhomes sit for at least 5 minutes withe engine running before moving off!!. Particularly annoyingly if they are parked up next to you. Goodness knows why they can't set the sat nav, put seat belt on, pick their nose etc before starting the engine. And why start it before the wife has even finished doing the washing up?

As for after - I will allow my high performance turbo charged sports car engine to idle a little after a high speed run just to allow the turbo to cool a little but a bit unnecessary in a motorhome.

My husband does this in every vehicle he drives and it annoys the sh*t out of me. Example.......we get in and he starts the engine. Then realises he's left something in the house that he needs, so he goes to get it. Gets back in and starts to set the satnav. Starts driving out of the drive and then decides to put his seatbelt on, while the car is weaving around on the road. Honestly, it drives me nuts!!!

 

[68c]

Back in the seventies I worked on turbocharged Bell 47 helicopters. You could see the turbocharger glowing red hot as it came into the hover before landing on it's skids. That hover requires a high level of power. Pilots always observed a three minute run down to cool the turbo so oil did not bake in the small oil passages. Fixed wing aircraft land on the runway and taxi in, this low power period cools the turbo so less need for an extended run down. Even if you thrash down the motorway you will still slow down before turning off and driving to a parking spot, so a long cooling period not needed.