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Cooling System

Related articles

P0494 OBD-II Trouble Code: Fan Speed Low
Diagnostic Trouble Code (DTC): P0494 P0494 code definition If the PCM has detected a voltage reading that is too low from the electric cooling fan control circuit, the P0494 code will...
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...
How Long Does a Coolant Reservoir Last?
The coolant reservoir is a tank located in your vehicle that holds the overflowing coolant that...
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...
P0495 OBD-II Trouble Code: Fan Speed High
Diagnostic Trouble Code (DTC): P0495 P0495 code definition The P0495 code is stored when the PCM has detected a voltage reading that is too high from the electric cooling fan control...
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 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 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
Do i need to reset my vehicle after replacing my coolant sensor
If you have a check engine light that is still on then you may need to have the computer scanned to make sure that there was no other codes or damaged from the overheating situation you had. You may need...
Question
My radiator fans do not spin?? Do i replace the fan motor??
You would need to have the cooling fan relays checked to see if the relays are sending power to the fan motor. Also turn on the a/c to see if the a/c fan works since you have two fans one...
Question
replace radiator hose
If you have sensors in the upper and lower hoses then I suggest checking to make sure you can remove them and cut the new hose? Otherwise you will need to get factory hose with sensors installed in them. The...
Question
Air conditioner smells like radiator coolant, 2000 ford f150.
You may be developing a leak in the heater core. Your truck is about the right age. The heater core lives in the heat exchanger with the air conditioner evaporator so anything that happens in there will come out of...
Question
How do I fill the cooling system in my 1994 C220 Mercedes
To properly fill your cooling system, you need to start with the engine cold. With the engine off, fill the radiator slowly until the level is about 1"below the neck. Leave the cap off and with the car in park...
Question
my overflow tank is full and if i add more water to my radiator where will that water go?
To begin with: you don't want to put straight water into your cooling system. You need to use a 50% mixture of water and anti freeze. You put it in at the radiator cap. Start with the engine cold and...
Question
AC problem
You need to check to make sure the condenser is not blocked in the front and that the fans are coming on when the a/c is on. The system may work okay in cooler weather if fan is not working...
Question
2004 infiniti overheating. Can the water pump be bad even if its not leaking. Changed every thing else.
In the old days, if the water pump was turning, it was working. But many modern cars have plastic impellers in the water pump and they can lose their grip on the shaft when they get old. It's hard to...
Question
Is a coolant leak a byproduct of redlining a car for an extended amount of time?
Wow! You'd better check the oil too! Driving the car this way is about the same as taking it out on the racetrack for about an hour. The racetrack always brings out any weakness that a car has so If...
Question
oil light came on and accidental dumped 1/2 quart of oil in the rad before I realized it. Siphoned off a little more than a 1/2 ga
Hello, thank you for writing in. If you did not get all of the oil out of the radiator before you started the vehicle, that oil is now contaminating the thermostat, water pump, and the engine cooling pockets. Even with...
Question
Temperature gauge goes up to 3/4 then back down to half.
This kind of behavior may mean that you are low on coolant. Normally the tip of the temp sensor is submerged in coolant. When the coolant is low, there may be an air pocket around the sensor that allows it...
Question
My car is leaking coolant and telling me to stop the car and check coolant.
Going by your description and the age of the car, I'm going to guess you have a problem with your water pump. The water pump has a rotating seal that often doesn't leak unless the engine is running. If your...
Question
My car overheated now it cranks and won't start no blown head gasket
If the car was out of coolant, and shut off because it was overheated, then there is a good chance that there was some engine damage. But don't panic yet, the codes and leaks you have might be separate issues...
Question
Losing coolant
You probably have a leak, and the first place I would look is the radiator. Most likely you will see evidence of a leak at either of the two bottom corners. But don't stop there. Your car has a pretty...
Question
Before work today my car turned on and off in 10 seconds. After work I turned it on and it started leaking green liquid & smoking
The green fluid is probably coolant and the smoke is probably steam. You may have a serious coolant leak that is causing your car to overheat. If the car was driven very far while overheating, it may have caused some...
Question
Location of thermostat.
Hello, thank you for writing in. While it is strange to think the thermostat can be located on the lower radiator hose, this is common practice for some manufactures. The concept works exactly the same. The coolant entering the radiator...
Question
Found Casting sand in coolant overflow, sand left from engine block casting, what is best "repair"?
The only way to try and flush out all the sand is to drain the cooling system and flush out with fresh water until the system is cleaned out the best as possible. Even after this you will need to...
Question
My car has just started overheating but has never gone pass the 250 degree mark on the dashboard
Hello, thank you for writing in. The vehicle goes into "limp mode", or your model's version of, when it is at risk of becoming damaged. This is a good thing, and it will protect your engine from having worse issues...
Question
Coolant
If you have to keep adding coolant and the engine uses it and have to add more everyday then you should have the system pressure tested to see if there are any external leaks. If there is none then you...

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