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coolant

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How to Check the 5 Essential Fluids in Your Car
Checking your oil and adding engine coolant, brake fluid, power steering fluid, and windshield washer fluid are essential for maintaining your car.
The Best Tool to Eliminate Air Bubbles
Air bubbles can form while mechanics perform service on coolant systems. A vacuum coolant filler helps eliminate this problem to avoid serious damage.
The Best Tool to Find Coolant Leaks
Diagnosing a car issue can be a tricky without proper tools. A coolant pressure tester is useful for diagnosing overheating issues and coolant leaks.
How To Keep Your Car From Overheating
Monitoring your coolant level, turning the A/C off in very hot weather, and regular inspections will help you avoid having an overheating car.
How to Replace a Coolant Reservoir
A coolant reservoir is at fault if coolant is leaking underneath the vehicle or if the coolant sensor remains on all the time.
5 Commonly Overlooked Vehicle Maintenance Items
Brake fluid, auto transmission fluid, and coolant flushes, as well as cabin filter changes and valve adjustments, are all important services.
The Best Tool to Reach Hose Clamps
Hose clamps are present in most cars, but can be hard to reach. Remote access hose clamp pliers solve this common issue for automotive technicians.
How to Replace a Cylinder Head Coolant Temperature Sensor
Signs of coolant temperature sensor failures include sluggish acceleration, hard starting, and a Check Engine or Service Engine Soon Light.
What Does the Coolant Temperature Warning Light Mean?
The coolant temperature warning light turns on when your engine is sensed to be too hot and is at risk of damage from overheating.
How to Replace a Radiator Hose
The radiator hose is an important part of your vehicle’s cooling system. The hose carries the coolant to the radiator, where the fluid is cooled, then back to the engine...
How to Use Engine Block Sealer to Repair a Head Gasket Leak
Head gasket leaks occur when engines overheat and can be costly to repair. Engine block sealer can be a quick and easy alternative for minor cases.
How to Calculate the Concentration of Coolant in a Car
A car cooling system works to transfer heat from the engine. Check antifreeze level and condition, and mix coolant with water to prevent overheating.
How to Replace a Coolant Level Sensor
Coolant level sensors are faulty if the coolant level sensor light stays on extensively or the engine overheats without the light coming on.
How to Replace a Coolant Temperature Sensor
The coolant temperature sensor switch is not working if the engine emits black smoke. The switch may have failed if the car gets poor fuel economy.
How to Replace a Car Surge Tank Hose
Replacing a surge tank hose involves working on the coolant system, which can burn you when the engine is hot. Stay safe by waiting for it to cool.
How to Remove and Replace a Heater Control Valve
The heater valve is integral to a vehicle’s cooling system. Replacing one requires a new valve, some basic tools, and fresh coolant.
How to Replace a Coolant Tube
The bypass hose in the coolant system may have failed when the coolant level is low and there is a visible leak underneath the vehicle.
How to Replace a Coolant Vacuum Valve Switch
A vacuum line attaches to the vacuum switch in your car as part of the engine’s heating and cooling system. A faulty switch can break your heater.
How to Find the Source of a Coolant Leak Faster and More Accurately
Keeping a good coolant level in your car is necessary to avoid overheating. If you think there is a leak, find where it's coming from to fix it.
How to Top Off Car Coolant
Coolant, also known as anti-freeze, needs to be kept at a certain level to prevent car engines overheating and damaging the engine.

Related questions

Question
Coolant issue engine overheating don't know cause
Hello. You are most likely correct on the heater core being your issue. This is the component that is located closest to the firewall which will have coolant running to it. The heater core also holds quite a bit of...
Question
Looking for a ohms / resistance chart for the water thermal sensor switch on a 1985 toyota celica.
Hi there. Get a digital ohm meter and check the resistance on the coolant temperature sensor (water thermal sensor). You are looking for readings that are more than 200 ohms in variance between a cold and a warm engine. If...
Question
It runs hot and theres (NO Water In Oil Pain) but theres water in the valve covers
One possibility is to pressure test the system when cold and look for visual indication of the leak point(s). You might have multiple leak points though and that has to be considered. As far as the overheating, leaks that bleed...
Question
2 kilometer run and the temperature is hotter than normal.
Hi there. Check the coolant level in the radiator. If the radiator is low on coolant, fill it up to the top and check for any visible leaks. If the coolant is not leaking, then check the engine oil and...
Question
Car is running hotter than normal.
Hi there. Check the coolant level to the radiator. If the coolant is low, then fill it up to the top and recheck the overheating conditions. If the engine continues to overheat or if the the radiator is full of...
Question
New thermostat and truck is still blowing only warm air. It blows cold air when idling
Trapped air in the cooling system can sometimes account for this but you are indicating that you are getting heat, at times, which would indicate that coolant is flowing. There is a heater control valve and you want to make...
Question
My coolant ran out when the vehicle sat for 2 years and I am scared to start it.
Hi there. Look in the engine compartment and locate the item that cracked to cause the coolant to leak out. If the radiator cracked, then replace the radiator, fill up the cooling system with water, and look for leaks. If...
Question
Coolant leaking 2009 Volvo Diesel D5 engine
Hello - coolant leaks have many sources, sometimes very subtle to locate. Since coolant evaporates on a hot engine, it is often hard to trace to it's source. It is still possible you have a blown head gasket (early stages),...
Question
Not sure if hose or water pump is the issue. Bad leak spraying coolant on belts. Could it be a hose or water pump?
Water pumps have weep holes, through which coolant can leak if the pump is failing, but those weep holes are are relatively small. Consequently, the leak is more likely due to a fairly large hole, or tear, in a rubber...
Question
Coolant leak visible from driver side of engine.
Hi there. The leak that you are seeing could be from a coolant hose that is either loose or split. Also the coolant leak could be coming from a core plug (freeze plug). The best way to track a leak...
Question
Leak in my cooling system
Hello there, many common faults will cause a coolant leak in your 2002 Saturn. Without knowing your exact make and model I can only provider general advice. Coolant leaks can form in almost any part of the system. The most...
Question
My water pump is bad.
There are 2 different 2.2L engines available for this vehicle and one of the requires a special tool to remove the timing chain driven water pump. The moisture with the green tint is likely to be engine coolant. Consider hiring...
Question
Car overheats aftr 10 mins of idle, but heater blows cold air. Trapped air noises? 2003 Audi A4
Hello - you have at least one cooling system problem that could be causing all of the symptoms, or more than one problem. The cooling system was not properly bled, and still big air pockets. This will cause overheating for...
Question
Over heating
This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...
Question
Coolant leaking from driverside
Many coolant leaks will leak more profusely when the engine is running due to the amount of pressure that is built up as a result of the water pump circulating the coolant through the engine and the intense heat generated...
Question
why is my windows fogging up and i smell antifreeze
It has been my experience that this is normally a sign that a heater core has gone bad. It starts leaking coolant into the heater box, underneath the dash. When the heater is turned on, the air moving through the...
Question
Coolant over flowing my radiator
Hi - if the radiator is overflowing while the engine idles (hot), but with the radiator or coolant recovery cap off - no, that doesn't necessarily mean you have an overheating problem. Even idling, the engine will get hot enough...
Question
My car is leaking green fluid badly 2007 Acura TL
Hello - the only green liquid that should be in your vehicle is engine coolant. Check your coolant reservoir for a low fluid level - may also have a warning light on your instrument cluster. As for the car not...
Question
Corrosion around my water pump 2001 Toyota Camry
Hi there - while your water may not be the source, there is a small leak of coolant onto the water pump which is the cause of the corrosion you mention. Modern coolants cause some oxidation of aluminum over time,...
Question
Temperature problems
Hello there, there are many faults that will cause your 1999 Chevrolet Tahoe's temperature gauge to only rise to 1/2 and the heat not function. The most common cause is air stuck in the cooling system, this commonly happens after...

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