![]() See Also: Can You Put Water in a Radiator in an Emergency? (It Depends on the Type) #3 – Leak Onto the Engine Block ![]() You shouldn’t see any steam or smoke coming from the cap, and if you do, then you’ll need to replace it. Once your engine is warmed up, you’ll be able to tell if steam is escaping from your radiator cap by merely taking a quick look at it. Radiator caps hold the pressure inside the system, but if it’s not sealing properly, then some hyper pressurized coolant will escape in the form of steam. The most common place is the radiator cap. If you’ve ruled out an internal leak, that means your engine is burning the coolant somewhere else. On top of that, you will likely see signs of oil in your coolant overflow tank or coolant in your oil. Expect your temperature gauge to rise way past normal also. This is because unlike gas, which leaves mostly clear or black exhaust fumes, coolant burns white, no matter what color of coolant your car uses. If you have a blown head gasket, you’ll have a ton of white smoke coming from the exhaust. While this won’t leave any visible signs on the ground, it will be pretty straightforward if you take a quick look at the exhaust. ![]() Head gaskets are notorious for leaking, but it leaks everything right into the combustion chamber instead of the ground. It’s likely the first thing a mechanic will tell you the problem is. See Also: How to Properly Check Coolant Level #1 – Head Gasket So, when your coolant is disappearing, you need to track down the cause, and you need to do it quickly.īelow are the three most common reasons your coolant reservoir is empty time and time again. Whether you drive a Subaru or a Lexus, your car needs antifreeze. Common Causes of Losing Coolant (But Don’t See a Leak)Ĭommon Causes of Losing Coolant (But Don’t See a Leak).
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