MHD coolant mode option

4coupe440i · 02-03-2024, 10:41 AM

MHD has the checkbox for "coolant mode" turned on by default.

According to the MHD manual it means this:

Quote:

This flash option changes the oil and coolant temperature targets to give improved cooling
during spirited driving or for use in hot climates.

FYI: this question is not about Sport Cooling mode for intercooler.

My question: coolant mode is turned on by default but is this something I really want? Reading the description I would say I should turn it off, I don't live in a hot climate.

I am confused about this setting as it is turned on by default.

(Note: for info on the difference with the other cooling option see this post: https://f30.bimmerpost.com/forums/sh...85&postcount=5)

Skyhigh · 02-03-2024, 10:48 AM

You sure it is on by default!? Doesn't ring a bell...

4coupe440i · 02-04-2024, 04:28 PM

Ok, I checked again... I made a mistake...

Coolant mode is not a checkbox option, it is a dropdown box (stock/sport/track).

Sorry for the confusion.

Dom147 · 02-07-2024, 08:04 AM

Not sure what MHD's coolant mode is but in BM3 there is a "MAX cooling mode" which sounds similar. Essentially all it does is have the fans constantly running and the pump is always on. I'd recommend leaving it off as you said since this makes it more difficult for you to reach your operating temp.

02-03-2024, 10:48 AM	#2
Skyhigh Brigadier General 1890 Rep 3,877 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	You sure it is on by default!? Doesn't ring a bell... __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
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02-04-2024, 04:28 PM	#3
4coupe440i Enlisted Member 6 Rep 38 Posts Drives: BMW 4 series Join Date: Dec 2022 Location: Europe iTrader: (0)	Ok, I checked again... I made a mistake... Coolant mode is not a checkbox option, it is a dropdown box (stock/sport/track). Sorry for the confusion.
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02-07-2024, 08:04 AM	#4
Dom147 Second Lieutenant 91 Rep 250 Posts Drives: 2014 BMW 228i, 2017 BMW M240i Join Date: Apr 2021 Location: Northern Virginia iTrader: (1) Garage List 2017 BMW M240i [0.00]	Not sure what MHD's coolant mode is but in BM3 there is a "MAX cooling mode" which sounds similar. Essentially all it does is have the fans constantly running and the pump is always on. I'd recommend leaving it off as you said since this makes it more difficult for you to reach your operating temp.
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