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Cooling System

Related articles

Symptoms of a Bad or Failing Radiator Hose
Common signs include leaking coolant, engine overheating, the Low Coolant Light coming on, and radiator hose damage or collapse.
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 Quickly Cool Down a Hot Car
Knowing how to cool off a hot car that has been sitting in the heat and sun can save you the discomfort of having to sit in...
How Long Does a Cooling Fan Relay Last?
The purpose of the cooling fan relay is to pull air through the A/C condenser and the radiator. Most vehicles have two fans, one for the radiator and one for the...
How Long Does a Cooling Fan Resistor Last?
The purpose of the cooling fan resistor is to remove heat from the engine’s coolant and from the A/C refrigerant. The resistor does this by drawing air through the radiator and...
Symptoms of a Bad or Failing Water Pump (Auxiliary)
Common signs include no warm air or fluctuating heat coming from the heater, the window defroster not working, and high pitched buzzing sounds.
How Long Does a Coolant Reservoir Last?
The coolant reservoir is a tank located in your vehicle that holds the overflowing coolant that comes from your cooling system. The reservoir is a clear plastic container located near the radiator....
How Long Does a Connector Hose Heater Control Valve Last?
The hose heater control valve opens and allows hot coolant from the engine to blow into the heater core. After the vehicle gets to the correct temperature, the thermostat...
How Long Does a Coolant Recovery Reservoir Last?
The coolant recovery reservoir is both an expansion tank as well as a coolant recovery tank. In modern vehicles, the radiator has no cap so it has no upper tank for...
How Long Does a Coolant Tube Last?
The coolant tube, or hose, carries coolant to and from the engine in your vehicle. First, the coolant tube removes the hot coolant from the engine and brings it to the radiator...
Symptoms of a Bad or Failing Water Pump
Common signs include coolant leaks at the front-center of the car, loose water pump pulley, overheating engine, and steam coming from the radiator.
How to Replace a Cooling Fan Resistor
The cooling fan may not work at all speeds if the resistor is broken. If the engine overheats or the fan never turns off, the resistor may be faulty.
How Do I Prepare My Car for Summer?
Summer's heat, dust, and stop-and-go traffic will take their tolls on your vehicle. Follow these tips to ensure optimum wellness of your car: Air Conditioning: Have your air...
How to Flush Your Cooling System
Flushing the cooling system is part of every vehicle's scheduled maintenance. This procedure is usually required every two to four years, depending on the vehicle. It is important...
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.
Why Cooling System Repairs on a European Car Can Be Tricky
Repairing a cooling system, such as if there is a leak, can pose different obstacles. Many repairs may involve finding the radiator of the system.
How to Replace a Cooling Fan Relay on Most Vehicles
Cooling fan relays fail when the radiator cooling fan no longer receives an electrical signal. A broken fan relay means the radiator cannot cool down.
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 Car Air Conditioning (AC) Compressor
If the AC compressor fails, it can cause the air conditioning system not to work. This article covers how to locate, remove, and install a compressor.
How to Replace a Condenser Fan Relay
A condenser fan relay operates the fan that removes heat from the engine. If faulty, it will not allow the A/C to blow cool air or function at all.

Related questions

Question
My car started overheating and I believe it was because of the coolant because I put some more and stopped
Hi...If there is an obvious leak, the fastest way to resolve this is to request a leak diagnostic. If simply "one" leak point is found on inspection, the responding certified mechanic will simply identify the parts required to fix it...
Question
Overheating when driving
Thermostats can only be installed in one orientation. Unless the thermostat that was installed is the wrong one, or was defective out of the box, the thermostat is probably not the cause of the issue. Inasmuch as the overheating is...
Question
Over heating
If you have really found evidence of cooling system blockage(s), then your continued overheating could simply be due to the fact that not all blockages are yet removed. Also, you could have multiple faults, that is blockages plus perhaps a...
Question
I was driving and sudenly i noticed car is stopping so i pulled over and noticed the radiator cap came out
If the vehicle overheated, that alone can cause a no start condition due to fuel vapor lock. If, once the vehicle has cooled down, it still won't start, that can be resolved if you request a no start diagnostic. The...
Question
Head gasket or not?
If it is confirmed (i.e., no false positive) that exhaust gas is present in the coolant, that means one of three things: the head gasket is leaking, the head has a crack in it (not unusual) or the block is...
Question
Water leaking out from side of engine
The freeze plugs are on the side of the engine block and in other areas of the engine that will corrode and rust out over time and may start to leak. You will need to have the cooling system pressure...
Question
My car trys to run hot and it leaks anitfrez and my heat don't blow out hot
You will need to identify where the coolant leak is. The water pump or heater core may be leaking causing the cooling system to get low on coolant causing the heater to stop working since no coolant is in heater...
Question
water is leaking
If you are getting a coolant leak behind a manifold then you may have a coolant pipe, hose leak on the intake side of engine or a head gasket or freeze plug leak on the exhaust side of engine. Have...
Question
Heat not blowing as hot as it should be.
A clogged heater core is a possibility. The other possibilities that should be considered are a faulty heater control valve, malfunctioning blend door(s) in the in-dash ventilation network, collapsed hoses, inadequate coolant, and trapped air in the cooling system. If...
Question
overheating
You seem to be indicating there is a leak, possibly a coolant leak. If so, the leak point(s) in the cooling system should be identified in a leak diagnostic and thence repaired. If perhaps the leak relates to the water...
Question
Car will not hold antifreeze smoke coming from the hood and tail pipe
You may have two different issues now that the engine is leaking coolant in the engine compartment from hitting the curb and also blowing smoke out of tail pipe that most likely is a head gasket from overheating the engine....
Question
2008 Kia Sportage had extremely low or no oil or radiator fluid a day after ECM replacement and sensor lights did not come on.
ECM replacement does not implicate the engine lubrication or cooling systems. It is possible the fluid levels were already low when the vehicle was presented for service although admittedly it is also possible to envision a scenario where a shop...
Question
fan working but no heating
Common causes of no cabin heat include malfunctioning blend door(s) (part of the in-dash ventilation network), a faulty or stuck heater control valve, a plugged heater core, collapsed hoses, and low coolant level. The cost to resolve the problem depends...
Question
Got oil in my coolant
What you are describing is due to a failure in the head gasket seal or there could be a crack in the block or head. Cylinder head gasket replacement requires strict adherence to Factory Service Manual specifications regarding block and...
Question
How much would a complete coolant system cost to replace in a Passat. I'm having a really bad leak and I believe its the o-ring etc.
Billing question sent to CS for the cost to replace all the components in the cooling system in a 2004 Volkswagen Passat with a L4-1.8L Turbo engine.
Question
Hi Pete, I've got my friend here w/a Nissan Maxima
It is not recommended to drive the vehicle if it does not have enough coolant or a major coolant leak or the engine may be damaged from overheating. It would be cheaper to rent a car now over having to...
Question
Heater and transmission fluid
The cabin heating system and the automatic transmission have no connection. Faults in one do not affect the other. The transmission fluid leak is possibly in the tubing and/or rubber hoses through which transmission fluid flows to the radiator and...
Question
Serpentine belt and radiator issues...
You can use regular water to flush out the old coolant and then drain the water and repeat until the water comes out as clean as when you put it in. Then refill with 50/50 coolant mix. Fir the belt...
Question
Car running hot
If the vehicle was not overheating prior to the replacement of the water pump, there are two obvious possibilities: when adding coolant back to the system, all air was not purged from the cooling system; and/or, the water pump doesn't...
Question
We can't drive our van very far
That odor is characteristic of an anti-freeze leak. The leak could be within the cabin, at the heater core, or in the engine compartment and the fumes are simply being drawn into the cabin. To resolve it promptly, the service...

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