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Coolant Color and Consistency Testing

Expert cooling system service technicians are happy to fix and help preserve your engine's durability. One way to keep it running is by guaranteeing that the cooling system helps prevent the engine from overheating. Often, unique tools is needed in order to service an engine's cooling system, which are owned by automobile repair shops like 12th Street Auto Care Center.

Engine Coolant Losing Its Color

One of the most common signs that your coolant needs to be replaced is by checking its color and consistency. Coolant should be brightly colored as orange, red, green, yellow, pink or blue. It should not be grimy or muddy in color or consistency, but clear and colorful. Before checking your coolant, make sure your vehicle has been turned off for a long time. When the engine is running, the antifreeze becomes hot as well, which, if mishandled, could leave you severely scalded. When your engine, radiator and coolant are cooled off, you can lift up the cap of the reservoir tank or remove the radiator cap to peek inside. If the back of the radiator pressure cap has brown sludge on it or brown crud, it is possible that your antifreeze is bad and could be damaging your engine cooling system. If you see floating chunks of rust or other sludge in either the radiator or the coolant reservoir, or reserve tank, it might be time to replace your coolant. If, however, you are unsure of the color consistency, coolant can be tested with a coolant hydrometer.

Napa Service Assistant

You don’t have to be an expert to know that preventive maintenance is the best way to make sure your vehicle is running properly. Use our interactive vehicle tool to learn about the maintenance and services your NAPA AutoCare Center can provide.

Napa Interactive Maintenance Tool