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Engine overheating there is no coolant leak but it overheats and

All the coolant disappears from the reservoir

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1st it is imperative that that cooloant mixture is correct. once you have the correct mixture have the thermostat replaced. Or just have a mechanic replace the thermostst and they will balance the coolant to water mixrure

eric

Posted on Feb 16, 2009

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Temp gage is solid red, air conditioner is now blowing hot air. Filled coolant reservoir and it emptied while driving but mechanic found no leak with pressure test. Is this a thermostat issue?


I doubt it.
A faulty thermostat would cause the engine to overheat after a few miles of driving. A faulty cooling fan could cause the engine to overheat and also keep the ac from working.
A leaking head gasket could cause overheating, and loss of coolant, but would not affect the ac.

Mar 06, 2016 | 2011 Subaru Outback

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What cause of overheat from engine


an engine will overheat if the rad cooling fan is not working, this will have to be check to see if its the fan motor, the fan relay. low coolant level, top up coolant check for leaks. could be head gasket problem, bad water pump(impeller worn).

Aug 08, 2014 | Daihatsu Charade Cars & Trucks

1 Answer

Coolant light keeps coming on


I wouldnt worry. Maybe a level indicator thinks it is being depleted. Give it a while. If it becomes more frequent or your engine overheats check coolant levels in reservoir. Most people will tell you it is common to have an empty reservoir, but not i. Check for signs of leaks in your driveway and fluid on water pump. If those are fine keep in mind coolant will still leak from your head gasket! There are a million ways for your coolant system to go wrong and little time to prevent overheating. Watch temp gauge and low coolant display staying on for elongated periods. :)

Mar 29, 2014 | 2001 BMW 325

1 Answer

Car overheating


You may have a blown engine head gasket. Check your oil to see if it is milky because water is getting into the oil, and check the water to see if oil is getting into the coolant.
If you have either of these, you may need to have a new head gasket for the engine, and hopefully you do not have a cracked engine head.
This will require a fair bit of work to fix correctly. Your local garage or mechanic may be your next call.
There are some products you can use in the coolant for either of these, but it is only a temporary fix.

Jan 31, 2014 | 2001 Mazda MPV

1 Answer

Engine overheats and heater blowing cold air


You have air trapped in system , change thermostat , bleed air from system , let it run hot while adding coolant with blower full blast on all front and rear heaters .

Jan 23, 2013 | 2001 Audi A6

1 Answer

My kia sedona 2003 is overheating is it the water pump


Probably not the water pump. The most common cause is rusted out/leaking underbody heater rear heater lines. The steel portions of the lines rust and leak coolant. The low coolant level will cause the engine to overheat. If overheated repeatedly these engines will usually warp the cylinder heads. This will cause severe overheating and may damage the radiator and other components due to combustion gasses entering the cooling system. A cooling system pressure test should be done to check for external leaks, and a block test can be done to check for the presence of combustion gasses entering the cooling system.Make sure to check coolant level in the radiator when cold, NOT in the reservoir on the inner fender. This could also be caused by something as simple as a thermostat or radiator fans that aren't working.

Jan 09, 2013 | 2003 Kia Sedona

1 Answer

I have a 90 chev camaro rs since new, but since then this vehicules has the same problems, "getting hot" and hotter when getting older. I have change every detail at it and even a additional...


Inside your car's engine, thousands of controlled explosions called combustion events occur. These explosions are created by igniting a fuel / air mixture inside the engine. Spark plugs are used to ignite the fuel / air mixture contained in the cylinders. These explosions are converted into power through the engine while producing a large amount of heat. These high temperatures are controlled with the help of the cooling system. A cooling system consists of a water pump, cooling fan, thermostat, radiator hose, hose clamps, radiator, radiator cap and coolant. Engine coolant is used to transfer heat from the engine to the radiator by the cooling system. The radiator removes heat from the coolant by forcing air through the radiator cooling fins. Without coolant your engine will overheat and if left unattended severe engine damage will occur. Engine coolant colors can vary from green, orange, blue, clear and yellow each having their own unique protective and environmental properties. Coolant leaks are a common car problem that can lead to overheating; we have listed some of the most common causes below.(Always inspect engine cold to avoid personal injury) (note: coolant and antifreeze refer to the same product, in below freezing, coolant lowers the freeze point hence the name anti-freeze and in warm weather coolant help raise the boiling point, "coolant").
Troubleshooting Procedure
Step 1: Check Engine Coolant Level, Test For Leaks - Engine coolant is used to transfer heat from the engine to the radiator; if a coolant leak is present the engine will eventually overheat. Inspect the engine coolant level in the coolant reservoir tank; coolant level should be between the hot and cold marks. Always check the coolant level when the engine is cold, preferably over night. If the coolant level is not between the reservoir marks the cooling system may have a leak.

If engine overheating has occurred the coolant level will naturally be low due to expansion of the coolant from the extreme heat of the engine. This heat expansion forces coolant out of the radiator and coolant reservoir. To test for an engine coolant leak move the car to a dry smooth surface and allow the engine to cool. Remove the radiator cap and carefully (do not spill) add water until full, then re-install cap. Start engine and allow to run for about three to five minutes (do not allow to overheat) while the engine is running inspect the ground below the engine, if an engine coolant leak is present observe the location of the coolant drops, this will help determine where to start looking for the coolant leak (shut the engine off before inspecting).

If no coolant is observed two additional checks are needed for a complete test. With the engine off remove the engine oil fill cap and turn it over, if a milky oil condensation is present the engine may have a failed cylinder head or intake manifold gasket allowing coolant to leak internally. To inspect engine gaskets disassembly is required. Next, the car heater core must be inspected; the quickest way to check the heater core condition without removal the heater core is to inspect the passenger's side foot well compartment carpet for the presences of coolant. If coolant is present the heater core has failed and must be replaced or repaired. After necessary repairs have been made refill the cooling system with manufacturers recommended engine coolant and recheck operation.

Nov 24, 2010 | 1990 Chevrolet Camaro

1 Answer

We installed a new radiator and it keeps overheating even after adding coolant and/or water. it is not leaking. do you know where the fluid is going? My husband and kids are stuck on the side of the...


Coolant only disappears one way. A leak. But the worst case is when it leaks into the engine. Gives you a chocolate shake for oil. Coolant doesn't dissipate like boiling water because it's sealed and why it overruns into the reservoir. As it cools **** out of the reservoir. If coolant level is lowering and causing overheating it's leaking. Just hope it's not into the motor.

Sep 04, 2010 | 2003 Volkswagen Jetta TDI

3 Answers

Where is termostat in hyundai elantra


It is not likely the thermostat, because the thermostat is showing that it is overheating,so it is working, you must have a coolant leak somewhere. You will have to find coolant leak. Car is overheating because it is low on coolant

Sep 21, 2009 | Hyundai Motor 2003 Elantra

1 Answer

I have a coolant leak on my 2000 BMW 528i and now it overheating.


Pressure test cooling system to determine origin of leak. Radiator and coolant reservoirs are common problems. Vehicle is very difficult to purge air from cooling system and may take multiple times of idling until thermostat opens. Sometimes help to rev engine to about 2500 rpm 5-8 times to help build heat and move coolant through system. Must have heater on while performing this task.

Mar 29, 2009 | 2000 BMW 5 Series

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