How long does it take for an engine to cool down??? If you scroll down the Topic list, you'll see the saga of my overheating Passat. The dealer could find nothing wrong, and since then I drove it three days without a problem. Until tonight. The thermostat needle pegged to the right and the display said STOP after only 20 miles. Once again, it has plenty of coolant in it. After 30 minutes off, it went from
240 degrees to about 200, so i drove ten miles until it pegged again. Waiting an hour with the hood up, the thermometer hardly moved. Shouldn't the engine cool quite a bit after an hour? It makes me think it's thermostat failure.- posted
19 years ago