The dealer told me my coolant has become diluted this test now confuses me.

Guy was supposed to buy my car and goes for a test drive. Afterwards, he opens the hood and unscrews the radiator cap and liquid starts spilling everywhere. He tells me that

Help, adding coolant/Antifreeze

Ouch, saw this today Subaru Outback Forums

If your engine is hot due to low coolant, would the temperature gauge still read correctly, or would you possibly burn the engine up from being unaware? - Quora

After a coolant flush, dealer used HOAT on a 2013 JK

If your engine is hot due to low coolant, would the temperature gauge still read correctly, or would you possibly burn the engine up from being unaware? - Quora

Porsche Macan Coolant Tank Replacement - Pelican Technical Article

Incorrect Antifreeze - To Stick or To Change! - Page 2 - Volvo Owners Club Forum

Silly but Is the coolant shown here blue or green (pic)?

2015+ 5.0 Coolant flush - Ford F150 Forum - Community of Ford Truck Fans

Coolant color - Forums

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Tips for Coolant Flushing: What I learned through doing it myself, and how to drain the system completely without removing the lower radiator hose

Coolant Type? Where to purchase?