how long for the engine to get hot? E320CDi

[rich-racing.co.]

I go to work - 3 miles, but takes about 15 minutes in the trattic.

my car is just about up to temp by then.

maybe the thermostat is stuck?

my wife's petrol CLK230 heats up in a fraction of the time.

 

[television]

Diesels do take much longer than petrol, I used to blank off half my rad in my 124 to get it warm enough, so why not blank off the bottom half of the rad for the winter with a piece of cardboard

You have the thermometer to see what the temp is

 

[timskemp]

Sounds about right. The older cars have an auxilliary heater that heats the interior of the car (if the AC is on (AC light off IYSWIM)) but I seem to recall the new V6 cars just heat up quicker. Mine takes 3-5 miles to get to the first mark on the temp guage, and can take ages to get to 60.

Bear in mind that that quick warmup on the petrol car is due to the inefficiency thereof, the heat is energy wasted instead of being converted to motion.

 

[rich-racing.co.]

Diesels do take much longer than petrol, I used to blank off half my rad in my 124 to get it warm enough, so why not blank off the bottom half of the rad for the winter with a piece of cardboard

You have the thermometer to see what the temp is

have blocked off parts of a rad before - I use tin foil as cardboard goes soggy.

might give it a go - running a bit cool anyway - just below 80 degrees??

 

[rich-racing.co.]

Sounds about right. The older cars have an auxilliary heater that heats the interior of the car (if the AC is on (AC light off IYSWIM)) but I seem to recall the new V6 cars just heat up quicker. Mine takes 3-5 miles to get to the first mark on the temp guage, and can take ages to get to 60.

Bear in mind that that quick warmup on the petrol car is due to the inefficiency thereof, the heat is energy wasted instead of being converted to motion.

mine has a switch in the ashtray which I think heats up the cooling system quicker??

nice to know it's the efficiency that makes it warm slower - better just eat my readybrek!

miss heated seats in the winter..

 

[Brian WH]

have blocked off parts of a rad before - I use tin foil as cardboard goes soggy.

might give it a go - running a bit cool anyway - just below 80 degrees??

Be very careful with blanking off radiators on modern CDIs. They are tuned so finely that any disruption to the flow of air may overheat the water/oil to detrimental effect. I wouldn't personally recommend it.

My old W211 320CDI used to take 10-15 minutes to warm up in the winter, 80 deg is normal I would say. I regularly did short journeys mixed with the odd day of longish run and had no problems. It's a diesel thing.

 

[television]

Be very careful with blanking off radiators on modern

CDIs​

. They are tuned so finely that any disruption to the flow of air may overheat the water/oil to detrimental effect. I wouldn't personally recommend it.

My old W211 320CDI used to take 10-15 minutes to warm up in the winter, 80 deg is normal I would say. I regularly did short journeys mixed with the odd day of longish run and had no problems. It's a diesel thing.

Though not that many people drive on the instrument some like me do.

If the engine gets up to 80c then the fan comes on, to do any damage by blanking the bottom of the rad (often cold) would be impossible if the gauge shows 80c

 

[DieselE]

Though not that many people drive on the instrument some like me do.

If the engine gets up to 80c then the fan comes on, to do any damage by blanking the bottom of the rad (often cold) would be impossible if the gauge shows 80c

My car has the straight 6 3.2 litre. In winter it takes 10-12 miles to get up to its normal operating temp which is 85 degrees (the difference between 80 and 85 could just be down to different gauge tolerances as it's only a bar indicator). It runs at 85 come rain, shine hell and high water (but as I'm not Brian WH, I avoid the high water ). So far, in three years I've never spotted the fan coming on.

I agree with Brian, the car is very good at controlling the temperature within tight tolerances and blanking off part of the radiator is not a good idea.

 

[Brian WH]

Though not that many people drive on the instrument some like me do.

If the engine gets up to 80c then the fan comes on, to do any damage by blanking the bottom of the rad (often cold) would be impossible if the gauge shows 80c

So the advantage of blanking is????

If the gauge shows 80 deg, I fail to see how the bottom of the rad can be cold on a fully recycling system.

 

[GrahamC230K]

I have to say blanking radiators sounds a very dated concept not required in our climate.

In that distance it sounds right to me. Deisels take much longer to warm up and I find unless under load they dont heat up at all, at idle alone the water temp never moves.

 

[BlackC55]

Modern diesels take an age to warm up due to excellent thermal efficiency

This is why they have coolant filled alternators to warm the engine up faster.

 

[television]

Cars are made for all climates, from those countries that have winters at -0c to -50C and summers of 20c to 40c. We go from -10 to 33c on average

The cooling system on cars has not changed on cars since the 20's to any degree. Rad blinds were made for the 123 cars but the modern design after that time there was nowhere to fix them to, and cars started to become fashion items.

MB did their bit by holding onto the lower gears to warm up the cat and for economy and nature. If your diesel car take 10 miles in winter to get to 80c whats wrong with trying to do it in 5 miles. With a part of the rad blanked off that they do warm up quicker and parts of the car like the thermostat and fans come into operation earlier and that is better for all working parts of the car and the comfort of the driver.

If you have your rad ½ blanked off for just the 3 coldest months of the year advantages can be had all round. Do not forget that cars have to also run at temperatures up to 40c

Rather than just poo poo the idea for the sake of it, why not say what any dangers are, then we could discuss the subject in a sensible manner.

Electric engine warmers like the one in the link for the 202 200D are used in some countries the second link shows 2 types of heater for the 210.







http://www.detali.ru/cat/oem_mb2.as...416717.418&CT=M&cat=19R&SID=20&SGR=100&SGN=04
http://www.detali.ru/cat/oem_mb2.as...647716.651&CT=M&cat=19U&SID=20&SGR=100&SGN=04

 

[Brian WH]

My arguement is that it takes about 5 miles on a cold day for the diesel engine to get to 80 deg. Fine if you blank part of the radiator off then it may do it in 3 miles-hooray.

However the rest of the journey the engine will be fighting to keep the temperature down, and the fan. that actually comes in at 105deg, will come on regularly on a long journey.

If the radiator was not blanked off the engine will perform at 80-85 deg as designed with no problems/overheating after the first 5 miles.

My defence rests mylord.

 

[television]

My arguement is that it takes about 5 miles on a cold day for the diesel engine to get to 80 deg. Fine if you blank part of the radiator off then it may do it in 3 miles-hooray.

However the rest of the journey the engine will be fighting to keep the temperature down, and the fan. that actually comes in at 105deg, will come on regularly on a long journey.

If the radiator was not blanked off the engine will perform at 80-85 deg as designed with no problems/overheating after the first 5 miles.

My defence rests mylord.

Thats OK you can have the last word, you are lucky as it took my car 5 miles to get to 80c today and most of that was uphill, and to say that the engine will be fighting to keep the temp down is a gross exaggeration. The engine is only efficient when up to the max temp and not before. If the thermostat opens and closes more frequently so what, they do not wear out.
I brought my 124 back to the UK one spring from Sweden with the rad half blanked with out a murmur.

No it not would not look good in the MB handbook to say put something over the rad in winter, but a little handy tip does no harm on something that I and others have done with sucsess

 

[evdok]

What i do on cold start is press circulation button and open vents, car cabin warms up very quickly if thats what your after.

 

[rich-racing.co.]

thanks

all good advice, which brings me back to another idea I've been toying with since buying the car - a pre-heater...

will start a new thread on this one!

 

[television]

all good advice, which brings me back to another idea I've been toying with since buying the car - a pre-heater...

will start a new thread on this one!

This is the MB version made by Webasto

http://www.detali.ru/cat/oem_mb2.as...GA=722.626&CT=M&cat=65C&SID=20&SGR=100&SGN=04

 

[Ted]

Just a question.
Why do you need to blank off the rad?
Surely if the emgine is not up to temperature, the thermostat is closed and there is no water circulating through the radiator.
Water only flows through the radiator (apart from via the jiggle pin) when the engine has warmed up and the thermostat opens.

 

[television]

Just a question.
Why do you need to blank off the rad?
Surely if the emgine is not up to temperature, the thermostat is closed and there is no water circulating through the radiator.
Water only flows through the radiator (apart from via the jiggle pin) when the engine has warmed up and the thermostat opens.

We all did this in Sweden, when the water has started to circulate the rad was not being cooled as much and allowed the engine to reach the optimum temp, and kept the thermostat open thus giving a more comfortable heater in the car, that was the sole object, and it worked.

I was taught by RR that any engine performs in the most efficient at manner at 100c. Many people complain that their MB heater is too cold.

Technology changes all of the time and there is quite a difference from the early MB running temp to the present ones, the early ones could be very cold in winter

 

[glojo]

In winter we tend to turn the heat to full and then turn up the speed of the fan. I would suggest you have the speed set to its lowest setting within the realms of safety as this will extract heat away from the engine, which in turn will lengthen the time it will take to warm it up.

Stuck in a summer traffic jam it sometimes cools the engine by turning the heater on full and have the fans blasting out hot air

John

Don't like the idea of blanking off any part of the radiator

John