Auxiliary Radiator punctured, then replaced and coolant level still low

MadViper · 05-27-2021, 11:16 PM

Hello, just bought a 2013 Sakhir Orange M5 with 44K kilometers, the left auxiliary radiator was punctured, I replace the radiator (two days ago) https://www.ecstuning.com/b-genuine-...t/17112284277/
and according to the dealer the problem was solved. Today I got the "engine temperature, temperature too high..." warning message I parked the car for 30 minutes and then went to open the coolant reservoir for the turbos, to my surprise the coolant was below the minimum recommend, to be honest I couldn't see the coolant at all.
The way I see it, either I was not put enough coolant on the reservoir or I have another leak. Does someone know how much coolant (liters) that reservoir can hold to be between the min and max level?
Thanks in advance

Doctor_X · 05-28-2021, 12:44 AM

‘15 M5 COMP

I just started getting this same error message - but mine pops up only when making WOT pulls and it isn’t associated with a code, usually resolves in about 15 seconds.

Weird thing is that both oil and coolant temps are totally normal during datalogged runs when it occurs. When it’s on - car only achieves 14-16 PSI of boost. Once it shuts off - it’s back to full boost and power.

I just bought a cooler tstat to see if that makes it go away. If not - I’m not sure where it’s coming from. I replaced both the coolant and oil temp sensors but that didn’t fix it.

05-27-2021, 11:16 PM	#1
MadViper Private First Class 142 Rep 102 Posts Drives: 2019 M2C Join Date: Apr 2015 Location: Panama iTrader: (0)	Auxiliary Radiator punctured, then replaced and coolant level still low Hello, just bought a 2013 Sakhir Orange M5 with 44K kilometers, the left auxiliary radiator was punctured, I replace the radiator (two days ago) https://www.ecstuning.com/b-genuine-...t/17112284277/ and according to the dealer the problem was solved. Today I got the "engine temperature, temperature too high..." warning message I parked the car for 30 minutes and then went to open the coolant reservoir for the turbos, to my surprise the coolant was below the minimum recommend, to be honest I couldn't see the coolant at all. The way I see it, either I was not put enough coolant on the reservoir or I have another leak. Does someone know how much coolant (liters) that reservoir can hold to be between the min and max level? Thanks in advance
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05-28-2021, 12:44 AM	#2
Doctor_X Banned 1158 Rep 545 Posts Drives: 2015 M5 CP - 2022 M5 CS Join Date: Sep 2016 Location: Phoenix iTrader: (1) Garage List 2015 BMW M5 CP [0.00] 2022 BMW M5 CS [0.00]	‘15 M5 COMP I just started getting this same error message - but mine pops up only when making WOT pulls and it isn’t associated with a code, usually resolves in about 15 seconds. Weird thing is that both oil and coolant temps are totally normal during datalogged runs when it occurs. When it’s on - car only achieves 14-16 PSI of boost. Once it shuts off - it’s back to full boost and power. I just bought a cooler tstat to see if that makes it go away. If not - I’m not sure where it’s coming from. I replaced both the coolant and oil temp sensors but that didn’t fix it.
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