How to Determine Insufficient Vehicle Coolant?
2 Answers
Vehicle coolant insufficiency can be determined by checking the scale lines on the radiator. If the coolant level is below the minimum mark, it indicates insufficient coolant. The purpose of coolant is to prevent various fluids in the car from freezing and ceasing to function in cold environments. Characteristics of coolant include: 1. Anti-freeze in winter; 2. Corrosion prevention; 3. Scale prevention; 4. High boiling point. Precautions when replacing coolant: 1. Measure the antifreeze freezing point; 2. Prevent leakage during replacement; 3. Avoid injury from hot coolant spraying; 4. Ensure complete drainage of the original coolant; 5. Refill to the standard level; 6. Wipe off any residual coolant from vehicle components; 7. Confirm there are no leaks after completion.
After running this auto repair shop for so many years, the easiest way I've found to check for low coolant is to inspect the expansion tank when the engine is cold. That translucent or semi-transparent reservoir is usually located near the edge of the engine bay - the fluid level should be between the MIN and MAX marks. If it's low, you're running short. Another telltale sign is when the temperature gauge spikes into the red zone or the cooling fan kicks into overdrive. Always check around the reservoir for leaks too - look for colorful stains or dripping liquid. Just last month, we had an older car that kept losing coolant, and it turned out to be a loose radiator hose connection leaking everything out. Make it a habit to check levels every two months. When topping up, always use the OEM-specified coolant and avoid mixing brands to prevent chemical reactions. Addressing this promptly prevents overheating damage - saving you thousands in potential engine overhauls.
