BMW M3 and M4

EXPLAINED: BMW M3 AND M4.

Episode 01: cooling system.

Explained: BMW M3 and M4.Episode 01: cooling system.

The epitome of racing feeling in everyday traffic starts a new round. 35 years after the debut of the first BMW M3, BMW M GmbH presents the latest generation of its high-performance automobiles in the premium mid-size segment. Time to introduce the two new vehicles. In the #M3M4explained series, the developers have the floor.

 

In episode two, Markus, responsible for the development of cooling systems BMW M3 and M4, explains why the high-performance engine with up to 510 hp, the brakes and the transmission remain within the ideal temperature range even under the greatest stress. He also answers questions from the BMW M community.

 

BMW M3 Sedan:
Fuel consumption in l/100 km (combined): 10.8 (NEDC) / 10.6-10.3 (WLTP)
CO2 emissions in g/km (combined): 248 (NEDC) / 241-236 (WLTP)


BMW M4 Competition Coupé:
Fuel consumption in l/100 km (combined): 10.2 (NEDC) / 10.2-9.9 (WLTP)
CO2 emissions in g/km (combined): 234 (NEDC) / 233-227 (WLTP)

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BMW M3 M4 Explained

BMW M ENTHUSIASTS ASK, BMW M EXPERTS ANSWER.

What is the operating engine and oil temperature?

 

Markus: Water between 90°C-105°C; oil around 100°C.

 

What is the maximum oil temperature? How much heat can it withstand?

 

Maximum engine oil temperature is about 130°C.

 

 

 




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BMW M3
BMW M4

For the engine oil cooler, how much air flow/vehicle speed does it need to fully work? It has no fan to support.

 

The oil cooler performance increases with speed. However, while standing still there is sufficent cooling ensured.

 

Wouldn't it be smarter to place the cooler at a slight angle so you would have more surface for cooling?

 

Good idea! But for now, it's not possible due to package constraints.

 

Where is the intercooler located?

 

It's right beside the engine integrated into the intake plenum.

 

How does the intercooler of the S58 work, compared to the S55?

 

The intercooler in the new BMW M3 and M4 is a charged air/water type intercooler like the predecessor with about 50% higher performance.

 

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Is the engine oil cooler protected by a bumper?

 

Yes. It is protected by 2 bumpers, one per side. #bordsteinabfahrtdaempfer

 

Won't the lip (to create low pressure for the oil cooler) worsen the flow along the underbody?

 

***SPOILER ALERT*** Watch out for another episode to come …

 

Can you resume what is cooled? Engine, gearbox, differential?

 

There is specific cooling for the engine and M Steptronic transmission (water and oil). Manual transmission and Active M Differential are air cooled.

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Why does the automatic transmission version have an additional cooler/radiator?

 

There is an increased cooling requirement for automatic transmission.

 

On my M2 Competition, the left heat exchanger heats the tire more than the right one. Does this do the same?

 

No. The new BMW M3 and M4 is completely symmetrical in that regard.

 

Is there a radiator for power steering?

 

No, there is no additional cooling for the electric power steering.

 

Is there still a separation of cooling between turbocharger, intercooler and engine?

 

Yes. The turbo chargers are still separately cooled.

 

After how many kilometers should the cooler be replaced?

 

That completely depends on the actual use conditions. The radiator is not a regular wear and tear component; no scheduled replacement is required.


 

 

 

 

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BMW M3 Sedan

How many kilometers do you have to warm up before you can go full out?

 

That completely depends on the actual use conditions, especially outside temperatures. Watch your temperature gauges and the indicated red markings on the tach.

 

What's the average temp the car runs at, after some laps at the track?

 

That completely depends on the actual use conditions, especially outside temperatures.



 

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BMW M3 Sedan

How long have you been working for BMW?

 

Since 2000.

 

What did you major in to get into your position in the company?

 

I am a trained mechanic and majored in automotive engineering.

 

Which car do you drive Markus?

 

BMW 325i Coupé (E36).

 

Your favorite M car ever?

 

BMW M3 CSL (E46).



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  • The models illustrated include optional equipment.

    Official data on fuel consumption and CO2 emissions were determined in accordance with the mandatory measurement procedure and comply with Regulation (EU) 715/2007 valid at the time of type approval. In case of a range, figures in the NEDC take into account differences in the selected wheel and tire size; figures in the WLTP take into account any optional equipment. WLTP values are used for assessing taxes and other vehicle-related charges that are (also) based on CO2 emissions, as well as for the purposes of vehicle-specific subsidies, if applicable. Where applicable, the NEDC values listed were calculated based on the new WLTP measurement procedure and then converted back to the NEDC measurement procedure for comparability reasons. For more information on the WLTP and NEDC measurement procedures, see https://www.bmw.de/wltp.

    For further information about the official fuel consumption and the specific CO2 emission of new passenger cars can be taken out of the „handbook of fuel consumption, the CO2 emission and power consumption of new passenger cars“, which is available at all selling points and at https://www.dat.de/co2/.

    All vehicles, equipment, combination possibilities and varieties shown here are examples and can differ in your country. In no way do they constitute a binding offer by the BMW M GmbH. Visit your local BMW website or see your authorised BMW M Retailer for accurate details on the offers in your country.