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      05-12-2025, 09:06 PM   #1
Lienrocs
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Drives: E92 M3, M4 GTS, HP4
Join Date: May 2017
Location: Austin

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Coolant temps around 240 after four corners at COTA.

Hey everyone. I’m at a loss. Ive got massive coolant temp issues. I’m seeing temps go from 200 to 230 in half a lap at COTA (80 degrees ambient temp). I’ve replaced the thermostat, water pump (or gt4) and put a new do88 radiator in it and am running VP Stay Frosty (I’ve also run oe, distilled water and water wetter) and nothing I’ve done has fixed it. I even removed the ac condenser to see if that helped. I can’t even complete a full lap. I’ve done a chemical check to see if the head gasket is intact and it came back good to go. (I’ll do a compression test to verify). I’m at a total loss. Any and all feedback is welcome.
Appreciate 0