Your GMC engine operates most efficiently when it stays within a specific temperature range. To maintain this, the engine’s cooling system works to regulate the heat generated, preventing damage to critical components. If there’s an issue with the cooling system, it’s important to address it promptly. At your GMC dealership, we’re here to help with the following common signs that indicate it’s time for a cooling system service.
Coolant Leak
The cooling system uses coolant, which is a liquid mixture of antifreeze and water. The coolant continually circulates through the engine to absorb heat and transport it to the radiator. Inside the radiator, the hot coolant enters horizontal rows of thin aluminum tubes and is cooled by the rapid flow of air through the radiator grille as it passes over the tubes.
Worn seals, a rusted radiator, or any other damage to the cooling system can cause a leak. If the coolant leaks internally, it will cause the exhaust smoke to turn thick and white. An external leak is also easy to spot, as coolant is available in bright colors like blue, orange, pink, and green. We’ll examine your cooling system and fix the leak, then we’ll refill the coolant.
Clogged Radiator
The coolant absorbs other things besides heat as it moves through the engine. Rust particles, dirt, and other debris can all be collected and transported to the radiator. When the heat is removed from the coolant by heat exchange, the coolant flows out of the radiator but leaves any debris behind, and it sinks to the bottom of the radiator.
As time passes, debris accumulates at the bottom of the radiator and forms a thick sludge. As the sludge expands, it can block the exit from the radiator and the cooling fins. Any blockage in the radiator reduces its ability to remove heat, and the engine temperature will quickly rise. If your temperature gauge shows a rapid increase for no obvious reason, contact us ASAP so we can investigate and fix the problem.
Damaged Radiator Fan
As we’ve seen, airflow through the radiator removes heat. This works very well when your vehicle is moving, but if it’s idling, airflow is drastically reduced. When this happens, the radiator fan at the back of the radiator switches on and blows across the back of the radiator tubes, forcing heat from the coolant and blowing it out through the radiator.
If your engine temperature rises when your GMC idles, the radiator fan could be damaged. It might be a damaged wire, a blown fuse, or the fan may have seized. Our technicians will check and repair or replace it, depending on the situation. If your cooling system isn’t working as it should, contact us right away at Everett Buick GMC in Bryant, AR.
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