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Cooling System

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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 Do I Prepare My Car for Summer?
Summer's 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 conditioning inspected by a qualified technician. Newer models have...
What Causes a Car to Overheat?
Several problems can make your car overheat. A leaky cooling system, blocked radiator, bad thermostat, or failed water pump are common causes.
P0495 OBD-II Trouble Code: Fan Speed High
Diagnostic 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 circuit. What the P0495 code means In order...
P0494 OBD-II Trouble Code: Fan Speed Low
Diagnostic 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 be stored. What the P0494 code means...
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...
Signs Your AC Needs to Be Recharged
If you feel the AC is not cooling as much as usual, cannot hear the AC clutch engaging, and see refrigerant leaks, you may have to recharge your AC.
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 Often Does My Car Need a Radiator Flush?
A A radiator is part of the internal combustion cooling system in a vehicle. It is a form of heat exchanger, designed to transfer heat from the heated coolant mixture as it flows through the vehicle. Radiators operate by pushing...
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 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.
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.
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 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 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 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.
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.
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.
Symptoms of a Bad or Failing Radiator
Common signs include leaking coolant, vehicle overheating, sludge, and low coolant.
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.

Related questions

Question
Heater not working on 2012 ram turbo diesel 3500 when I turn truck off water leaks all over but coolant is all there
That sounds like a water pump leaking. In many cases the water pump seal can leak while the truck is parked, but not while it is running. In other cases it may leak when the engine is cold, but not...
Question
Why is my car leaking antifreeze?
Based on your description it sounds like your engine is overheating and the overheating is accompanied by a coolant leak. Coolant leaks can be both a cause and a consequence of overheating. Consequently, once the leak is repaired, your vehicle...
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
Temperature gauge goes up and down
You're probably low on coolant. Filling the reservoir doesn't really do the trick for filling the cooling system. There is probably air trapped in the cooling system that needs to be bled out. You may be able to do it...
Question
Overheating engine
If the vehicle is presently overheating, you want to check, and perhaps just replace, the cooling system thermostat (thermostats are not costly and they do eventually fail), check the radiator for blockages (radiators can be flow tested) and check the...
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
overheating
Be sure not to drive the car if it is overheating because overheating can warp the cylinder head and/or engine block causing costly damage. After repairing the hose, when you refilled the cooling system, if all air was not purged...
Question
Over heating problems
Based on what you are describing, typically a Mechanic would look for a faulty water pump, faulty radiator cap, plugged up, or externally obstructed, radiator, and/or non functioning electric cooling fans. However, your description of erratic operation of the temperature...
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
Over Heating
I would test for exhaust gas in the coolant which, if present, would mean that there is a head gas leak. If the coolant level is falling slowly over time, that suggests a leak as well and a pressure test...
Question
No air coming from vents
Try to put the blower on high speed and move the mode to floor or windshield to see if any air is felt or the noise from the motor is heard. If you hear the blower running but still get...
Question
My coolant reservoir is empty and coolant is splattered over my engine
Driving a car with "zero" coolant will destroy the engine within minutes. Even after a coolant leak, though, you have some coolant in the engine and water can sometimes be added to enable one to drive a "short" distance as...
Question
My car is overheating
If you have replaced the thermostat and radiator and the engine continues to run hot and cold and temperature is not controlled correctly. You should replace the cooling fan control switch and make sure all the air is removed from...
Question
Heating problem
The first thing to confirm is whether or not the engine operating temperature is in the normal range and whether there is sufficient coolant in the radiator. If, for example, the engine cooling system thermostat is stuck open, and thus...
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
Engine coolant disappearing
If the engine has a coolant leak that is not external to the engine or cooling system would not have anything to do with the transmission repairs. You need to have the engine head gaskets and intake manifold checked for...
Question
Engine coolant disappeared
The engine could have an internal coolant leak and the coolant is being consumed into the motor. This is is you do not see any leaks anywhere on the round or on the engine. I would recommend having a mechanic...
Question
Did I pay to much?
If what you describe is all you had done then I would have to say it may have been on the high side of pricing for parts and labor. I would however need to see the work order to know...
Question
Cooling system
The thermostat is a commonly known part to fail causing the coolant to not flow through the radiator properly causing the engine to overheat. The diagnosis sounds about right and is consistent with a thermostat failing. This can be caused...
Question
Cooling fans not working
If your cooling fan is inoperative, I would start by having a mechanic check the fan for power. If the fan is getting twelve volts but does not work, the fan is faulty. If the fan is not getting battery...

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