Once I'm above 20km/h, the temperature drops to normal. The vehicle has several indicators to warn of engine overheating. The last couple of days, my 92 Accord (Auto, 136,000 km) has had the engine overheat (almost into the danger zone) when idling and driving at low speeds. • Overheating can cause the camshaft to swell and then break. That said, I'm wondering about the mechanic's diagnosis, overheating at idle could also be caused by reduced coolant circulation (perhaps due to a water pump with a badly eroded impeller) or by a lack of airflow over the radiator at idle which could be caused by a fan failure or by something blocking the radiator. The vehicle may also display an ENGINE OVERHEATED IDLE ENGINE and ENGINE OVERHEATED STOP ENGINE message in the Driver Information Center (DIC). 2004 g35 sedan 6 speed Chevy Impala Engine Overheating. Only cools down when driving. Engine is overheating at idle, fans come on but still keeps getting hotter. Make sure to shut off the engine immediately, as an idling engine can continue to overheat. My question today involves my car, a 2001 Chevrolet Impala. Fluid levels seem fine. Step 3 – Pull over and shut off the engine Find a safe place to pull over and shut off your engine. See Engine Coolant Temperature Gauge . A few days ago while I was driving my car, I noticed that my needle for my coolant level began to rise into the Red Zone[hot coolant temp light came on] so I parked it & had a friend to come & look at it. I have to put on the heater full blast (I live in Arizona ugh!) Have you checked for a leak in the cooling system? I was out of town & Coolant is low now, no leaks, -40 Celsius temps currently. If your car has been running hot, you know the feeling. There is an engine coolant temperature gauge on the instrument panel cluster. It may even leave you on the side of the road then on to the repair shop for a serious repair bill. There is a different message that says "idle engine overheating," at this point I am very worried and I pull over and call the chevy dealership that I bought the car from and explain what has occurred. • Overheating can cause damage to the bearings and crankshaft. If this occurs then the engine will need to be rebuilt. Some of the most common problems from overheating are: • An overheated cylinder head can crush the head gasket and restrict coolant flow to the cylinders. Then temperatures start coming down. An overheating engine is more than an inconvenience, it can be an expensive engine killer. Reader Question. Overheating can cause a number of problems to the engine. Some times when the engine overheats it can cause some serious internal engine damage that will cause a loss of compression. It seems like if there is no air across the nose it gets hot. I'm taking it in tomorrow, and the mechanic is … Heat only works at idle, and overheated the other day and is now low on coolant. 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