Which kind of coolant for magnesium alloy

[Schuttwegraeumer]

I found only the MOTUL MotoCool FL (the red liquid) that is described als compatible with magnesium.
All other liquids like Glysantin are not for magnesium or magnesium alloys.
There are a engine blocks made of magnesium/alloys.
Which kind of collant are factory fill in this kind of engines?

 

[mightymousetech]

Maybe BMW coolant. They use a lot of magnesium in the block.

https://en.wikipedia.org/wiki/BMW_N52

Quote:
The N52 engine block is cast with magnesium and aluminum for the crankcase. Magnesium is used to save weight. However, magnesium is subject to a greater risk of corrosion from water, and magnesium may tend to creep under load at high temperatures. Thus, magnesium in its pure form or as a conventional alloy is not suited for permanently conveying high loads and forces of the kind typically encountered in central components of the engine. Therefore, BMW combined the N52 block to use magnesium alloy for the crankcase shell, with an aluminum “inner block” to complement the magnesium disadvantages.[3][6]


Although, not sure if the coolant comes in contact with the magnesium or not.

 

[HerrStig]

Good thing the bug motors were air cooled.

 

[Schuttwegraeumer]

Originally Posted By: mightymousetech


Although, not sure if the coolant comes in contact with the magnesium or not.


After reading the german artikel i would say NO.
Only the AlSi17-Insert are in contact to the coolant and BMW loves the classic G48 (blue) coolant.