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EPISODE 02: BMW M3 & M4 EXPLAINED.EPISODE 02: BMW M3 & M4 EXPLAINED.

EPISODE 02: BMW M3 & M4 EXPLAINED.

3 min reading time

Cooling system of the BMW M3 and M4.

BMW M3 & M4 Explained, episode 02: Markus, responsible for cooling systems, explains the complex cooling system of the new M Automobiles.

13 January 2021

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:
CO2 emissions combined in g/km 231–227 (WLTP)
Fuel consumption combined in l/100 km 10.1–10.0 (WLTP)
BMW M4 Competition Coupé:
CO2 emissions combined in g/km 223–219 (WLTP)
Fuel consumption combined in l/100 km 9.9–9.7 (WLTP)

BMW M ENTHUSIASTS ASK, BMW M EXPERTS ANSWER.

BMW M3BMW M3

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.

BMW M4BMW 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.

BMW M4BMW M4

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.

BMW M3 SedanBMW 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.

BMW M4BMW M4

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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