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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Drove 2 miles without coolant



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      11-01-2024, 02:29 PM   #1
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Drives: '11 E93 335i, '18 BRZ
Join Date: May 2024
Location: Dayton, OH

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Drove 2 miles without coolant

200 miles after flushing my coolant, the quick disconnect thermostat hose popped off, dumping most of the coolant from my 2011 335i E93. This happened 2 miles from home, a low coolant yellow warning came up, but nothing else (i.e. no engine temp lights or warnings). I didn't think this might be catastrophic coolant issue, so I finished the drive, about 5 minutes in the city. I didn't have an OBD reader on me so I don't know what was the coolant temp, but the oil temp gauge stayed around the normal 230-240 and didn't climb.
I put the thermostat hose back on (hopefully better than last time), filled around 1.75 gallons of 50:50 coolant and distilled water and ran the bleeding procedure twice (just to be sure). Car drives fine and there're no errors showing up. Oil temp gauge behaves as before. OBD reader shows coolant going up to 225 under load (which I understand is normal for the 335i). At least I got more coolant out than the flush that I only got 1.2 gallons out...

What are the chances that no damage was done? Anything I can do to check it out? Oil cap is clean.
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