If you cannot see a leak but you are losing coolant, you may need to perform a coolant pressure test. This procedure may allow you to more easily detect a coolant leak. Allowing your vehicle to climb to normal operating temperature and turning on the air conditioner increases pressure in your coolant system. Do not forget to check hose connections and components for leaks. If you do, trace the fluid to its source. With the car’s engine running, look under the hood to see if you notice any fluid flowing out. If you see any, you probably have fluid dripping from somewhere in the system. To locate a coolant leak, first look for puddles of coolant beneath your vehicle. If your car has a low-coolant indicator light, it may also illuminate. You may also notice steam coming from under your hood. If this happens, the temperature gauge on your instrument panel is likely to move upward, perhaps into the red zone. For example, your vehicle’s engine may overheat. Typically, a coolant leak presents itself in just a few ways. Therefore, you should never open the radiator cap or the coolant reservoir when your car’s engine is hot. If the engine is not completely cool before you remove the radiator cap, you may suffer a serious burn from escaping steam or hot coolant. You must be careful when checking fluid levels, though. You may also notice bubbles in the coolant reservoir or at a hose connection. Often, finding a coolant leak is simple, as you can see fluid dripping from beneath your vehicle’s hood.
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