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Diesel engine warm up


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#1 MikeWales

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Posted 30 November 2012 - 09:46

My first diesel engine car, so I need to ask the question.

I know the weather is colder, but I have noticed that even after 5 miles or so driving on country roads at 40 - 55 mph, when I come to a junction, the engine is idling at just over 1,000. (a bit like still having the choke out - for those old enough to know what I mean!) :rofl:

Is this usual or is the DPF being regenerated?

It usually calms down within the next 5 minutes or so and then idles normally.

Thanks

Edited by MikeWales, 30 November 2012 - 09:47.


#2 bilun777

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Posted 30 November 2012 - 10:40

+1, I put it down to increased electrical loads on the engine after a cold start ,then running lights,wipers,heated seats,radio, recharging the battery.
I don't know for definite but it does seem to last a long time?

#3 Llanigraham

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Posted 30 November 2012 - 11:06

Quite normal for a diesel. Whilst cold it ingests more fuel, just like a choke.
Nothing to worry about.

#4 MikeWales

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Posted 30 November 2012 - 11:19

Quite normal for a diesel. Whilst cold it ingests more fuel, just like a choke.
Nothing to worry about.

:whew: Thanks Graham!

#5 pinkpanther

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Posted 30 November 2012 - 18:08

Just been driving mine (2.0 TDi 110) for in excess of 40 mins / >10 miles and found it to be still idling at 1000 rpm when stationary. Oil temp still seems low as well.

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#6 pinkpanther

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Posted 30 November 2012 - 18:10

My admittedly less economical (Fuelly link below), >10 year old 1.8T 20v 4x4 Octavia is however up to temperature after 2-3 miles.

Progress??

#7 weasley

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Posted 30 November 2012 - 18:27

Diesels always take an age to heat up; the blocks are heavier and the way a diesel engine works means they get a lot of excess air flowing through them, which keeps the whole thing cool, especially when the air is so cold. It's part of the reason a diesel can idle all day without overheating.

#8 goneoffSKi

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Posted 30 November 2012 - 19:02

pinkpanther,
is it only the Coolant that is up to temperature in 2-3 minutes, or both Coolant & engine oil? & even in cold weather?

george

#9 pinkpanther

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Posted 30 November 2012 - 20:09

pinkpanther,
is it only the Coolant that is up to temperature in 2-3 minutes, or both Coolant & engine oil? & even in cold weather?

george


No way of knowing in the Octavia, as it lacks an oil temperature gauge. It does however tick over normally after a mile or two.

#10 The Plumber

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Posted 30 November 2012 - 21:14

On cold days like today, my Monsters oil rarely ventures past 85 deg C; possible why the dpf is so keen on regenerating actively.

Intended to get one of those lower grill covers but funds are a bit tight to say the least, after the unexpected early arrival of our Fabia Monte Carlo (collect next week fingers crossed); was due mid Jan :giggle:


TP

#11 bilun777

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Posted 01 December 2012 - 08:33

I suspect you've got some other problem if your water temp is that low after more than 10 miles.
Faulty thermostat perhaps?
Both my Yetis would show normal Temp after 3 to 4 miles.

#12 rockhopper

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Posted 01 December 2012 - 09:59

My Yeti in cold weather will take more than 15-20 mins in cold weather, sometimes longer, to get up to working temperature. It will have just started to blow warming air through the system by then. The electric seat heating takes about 10 minutes to get up to full burning b0tt0m temperature.

Mileage is subjective. How long does it take to do that number of miles, how hard is the engine working, what is the ambient temperature. Etc. etc.

#13 Llanigraham

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Posted 01 December 2012 - 11:02

This morning, leaving home.
0430 and -2 degrees.
Car standing outdoors all night.
Cover over windscreen overnight.
Settings at "max windscreen" and 22 degrees.

Slightly warm air through vents after 4 miles (5 mins), then up to full temp after 12 miles.(15 mins)
Don't know about oil temp as don't bother to look at it.

OK, it isn't quite as quick as a petrol, but it does me!

#14 rockhopper

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Posted 01 December 2012 - 12:19

That sounds right to me.

#15 Hairball

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Posted 01 December 2012 - 18:45

This morning, leaving home.
0430 and -2 degrees.
Car standing outdoors all night.
Cover over windscreen overnight.
Settings at "max windscreen" and 22 degrees.

Slightly warm air through vents after 4 miles (5 mins), then up to full temp after 12 miles.(15 mins)
Don't know about oil temp as don't bother to look at it.

OK, it isn't quite as quick as a petrol, but it does me!


Pretty much the same here earlier today.

#16 Zib

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Posted 04 December 2012 - 21:23

Don't know if it still true, but my old Golf TDI (1995) would always warm up (and warm up the cabin) much more quickly in cold weather by keeping the cabin heat off for the first 3-5 miles to get the engine warm. If I started from very cold with the heater turned up, it would take ages to warm.

These days with climate control, I just tend to turn the temperature to the minimum setting above "Lo" until the engine coolant has got to about 70 degrees C. This seems to get the car warmer much quicker than leaving the climate control to its own devices.




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