What Causes the Coolant Temperature to Be Too High in the Buick Verano?
2 Answers
Buick Verano coolant temperature is too high due to: 1. Insufficient coolant caused by leakage in the cooling system; 2. Malfunction of the radiator fan, which prevents timely heat dissipation when the car engine operates at medium to high speeds, causing heat to transfer to the coolant. Coolant serves to provide anti-corrosion protection for components of the cooling system. Taking the 2020 Buick Verano as an example, it is equipped with a 1.0T inline 4-cylinder turbocharged engine, delivering a maximum horsepower of 125 PS, a maximum torque of 180 Nm, and a maximum power of 92 kW. The maximum power speed is 5800 rpm, while the maximum torque speed ranges from 1300 to 4500 rpm. It is paired with a 6-speed automatic transmission.
That day, while driving the Verano on a long trip, the water temperature warning suddenly came on. I quickly pulled over and opened the hood to check, only to find the coolant was almost empty. Later, I learned it could be due to a leaking radiator or aging pipes—this car is particularly prone to such issues after five years. A faulty water pump is also common; you can feel poor circulation when the belt starts squeaking. A stuck thermostat is even more troublesome, as it prevents the large cooling cycle from opening, causing the water temperature to spike in traffic. Last summer, I also encountered a situation where the cooling fan wouldn't spin—turned out the controller connector was oxidized. If the cause remains unclear, the cylinder head gasket must be checked; if oil bubbles appear in the coolant, it's a serious problem. Every time the engine overheats, I stop immediately, wait for it to cool, then add distilled water as an emergency measure before towing it to the repair shop for a thorough inspection.
