Why does my car only leak coolant sometimes?

A coolant/antifreeze leak can occur for a variety of reasons, including a blown radiator hose, a bad hose clamp, warped head gasket, or the most common reason, a foreign object kicked up by the truck in front of you penetrating the radiator itself.
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Why does my coolant leak only sometimes?

It can be due to a torn hose, a bad radiator or radiator cap, a damaged water pump or head gasket. Sometimes, this problem can occur as a result of an overflowing coolant reservoir tank and not the fault of the components in your vehicle's cooling system.
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Why am I leaking coolant but not overheating?

It may be a broken hose and/or a hole in the radiator. Solution: Check your hoses to see if any coolant is coming out. Replace the hose(s) if you notice coolant coming out of them. If you notice coolant leaking out of your thermostat that can be an easy fix.
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Is it normal for a car to leak a little coolant?

Although a small coolant leak doesn't seem like a pretty serious issue, it can lead to complete engine failure and irreparable damage. The coolant system is one of the most important parts of any car because it keeps the engine temperature in check by cooling the antifreeze/water mix that runs through the engine block.
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How do I find out where my coolant is leaking from?

To locate a coolant leak, first look for puddles of coolant beneath your vehicle. If you see any, you probably have fluid dripping from somewhere in the system. With the car's engine running, look under the hood to see if you notice any fluid flowing out. If you do, trace the fluid to its source.
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Found Puddles Under Your Car or Truck? How to Diagnose Coolant Leaks!



Why is my car using so much coolant?

If you are regularly topping off your coolant, you have a coolant leak somewhere in the system. It can be difficult to identify where the leak is coming from. Often it is best to have a professional diagnose a coolant leak, but there are a few things you can check before bringing your car into a shop.
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How often should coolant be topped up?

You need to check your engine coolant at least twice a year before summer and winter, ideally. Although, this advice may vary between car manufacturers. Coolant should be topped up whenever the level drops below the guide marks.
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How often should you add coolant?

HOW OFTEN SHOULD YOU FLUSH THE COOLANT? Depending on the vehicle and the coolant, the average time between flushes is two years or 30,000 miles for silicated coolants and up to five years or 100,000 miles for an extended drain coolant.
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How do you know if you have a bad coolant pump?

5 Symptoms of a Failing Water Pump
  1. Coolant Leaking. One of the first signs of a potentially faulty water pump is a puddle of coolant on the ground where you've parked your car. ...
  2. Rust or Deposit Build-Up. ...
  3. Noise. ...
  4. Overheating. ...
  5. Steam.
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Can coolant leak from heater core?

Another sign of a damaged heater core is leakage of coolant from under the dashboard. As said earlier, the location of the heater core is behind the dashboard on the passenger side. If your heater core is leaking coolant, that means the coolant level is low. As such, the engine can overheat.
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Can I just top off coolant?

Top off the coolant reservoir

If the coolant level is low in the reservoir, you can refill it to the max fill line but do not overfill it. The coolant mixture expands when it heats up and needs the extra room. Keeping your coolant at the correct level is one of the ways to keep your radiator good working order.
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Is it normal for coolant level to drop over time?

If you notice coolant levels are dropping by the day, this is because of an internal or external leakage in the cooling system which needs immediate attending to. External leakage may be any leakage in the hoses, radiator tank or throttle body(depending on the car you drive).
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Why does my coolant go up and down?

The primary reason your car temperature gauge goes up and down while driving is simply because a component in your cooling system is not functioning correctly. This could be the thermostat valve, radiator hoses, radiator fan, the temperature gauge, or the coolant itself that circulates around and cools off the engine.
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Should the coolant reservoir always be full?

Your coolant reservoir tank should be at least 30% full. Most reservoir tank has a min and max mark drawn on the side of the container. What is this? The most common cause of a coolant leak is a bad radiator cap, bad radiator fans, and loose radiator hose clamps.
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What does a car sound like with a blown head gasket?

If the head gasket fails in such a way it allows the compressed air/fuel to escape, the compression of that cylinder is reduced. This loss of compression results in a rough running engine and a notable reduction in engine power. This sort of failure typically is accompanied by a sound like an exhaust leak.
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What are the signs of a cracked head?

If your car is indeed suffering from a cracked cylinder head, you'll likely notice one or more of the following symptoms:
  • White Smoke (Steam) From the Exhaust Pipe. ...
  • Low Coolant Level. ...
  • Engine Overheating. ...
  • Rough Running and Misfiring. ...
  • Combustion Gases In the Cooling System. ...
  • Illuminated Warning Lights. ...
  • Coolant-Oil Intermix.
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Will check engine light come on for blown head gasket?

your check engine light is on: the car's computer constantly monitors engine performance. if it detects a misfire caused by a leaking head gasket, it turns on the check engine light.
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Can I mix old coolant with new coolant?

Just fill in the replacement coolant through the reservoir. Use coolant from the dealer to ensure there is no problem with mixing types. You should open the bleed valve to get any residual air out of the system.
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Do you have to drain old coolant before adding more?

You can add the coolant without flushing out the old. However, with time, the older coolant becomes acidic. This can cause corrosion, and afterward, can cause defects in the cooling system. Its recommended by most manufacturers that you replace the coolant after every 30,000 miles.
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Will radiator pull coolant from reservoir?

For Q1 , if the overflow tank has the pressure cap on it the yes coolant will be drawn into the system. Otherwise the seal on the radiator cap will prevent flow in reverse.
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How do I know if my heater core is leaking?

So it's important to know the 5 signs to look for a leaky heater core.
  1. Your Car Smells Sweet. You may notice a sweet smell from your vents. ...
  2. Your car windows become foggy. ...
  3. Your car is blowing cold air into the cabin. ...
  4. Your car is devouring coolant. ...
  5. Your car's cabin is cold, but the engine is hot.
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What is the first test to perform when checking a cooling system for leaks?

Any time you open the cooling system and put it back together, you'll want to pressure test the cooling system to check for any leaks. This is commonly the next step after performing a cooling system flush. The pressure test can also be done any time a leak is suspected. You'll use a cooling system pressure tester.
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