Hi all,
I've been doing some trackdays in my Z4 for a bit. In my last 3 trackdays, all in quick succession, I experienced some issues with coolant temps going up to over 236F (113C). In all my prior trackdays, coolant has been stable with a peak of 215F (101C), only peaking after session ends.
In an attempt to reduce the temps, I decided to flush my system (no idea when it was last done and by who) and replaced the 50/50 coolant mix with distilled water, as temps here in Northern California only go down to freezing maybe 2 days of the year. It would also mean less of a mess to clean up on track if I were to have an incident
I also added water wetter, which my friend said lowered temps on his miata significantly (he had overheating issues before). I was just wondering if anyone had any experience running plain distilled water and/or water wetter on their N52. I am concerned that, in the long run, this could cause corrosion due to the block being partly made of magnesium.
I've been doing some trackdays in my Z4 for a bit. In my last 3 trackdays, all in quick succession, I experienced some issues with coolant temps going up to over 236F (113C). In all my prior trackdays, coolant has been stable with a peak of 215F (101C), only peaking after session ends.
In an attempt to reduce the temps, I decided to flush my system (no idea when it was last done and by who) and replaced the 50/50 coolant mix with distilled water, as temps here in Northern California only go down to freezing maybe 2 days of the year. It would also mean less of a mess to clean up on track if I were to have an incident

I also added water wetter, which my friend said lowered temps on his miata significantly (he had overheating issues before). I was just wondering if anyone had any experience running plain distilled water and/or water wetter on their N52. I am concerned that, in the long run, this could cause corrosion due to the block being partly made of magnesium.