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Re: car over heating. tempature gauge fluxuates
Your overheating problems can have several possible causes.
1) Airlock in heating system - solution - bleed air from cooling system. Method is dependent on make/model of vehicle
2) Radiator blocked - solution - drain and flush radiator
3) Failed waterpump - solution - fit new waterpump
4) Engine thermostat stuck in closed position - solution - fit new thermostat
5) Electric cooling fan (if fitted) failing to operate - solution - check fan, fan operating switch, all wiring and connectors
6) Not enough coolant in system - solution - check and top up to required level. Also check all hoses for sign of leakage.
7) Faulty temperature gauge giving incorrect reading
I have a 2001 S-type. the temp guage will peg to hot very quickly and then will return to normal within a couple of minutes after stopping. The A/C is off. I have checked fluid level which is fine, and no signs of a water leak. My question is since the needle will peg very quickly could this be a thermostat. I am currently 120 miles from a competent garage. It is the 4.0 model
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Yeah that is very possible the most common cause is because there isn't enough coolant in the radiator. If your radiator has a cap directly on it take it off and make sure the radiator is filled to the top of the neck with coolant. If the radiator does not you can remove the upper radiator hose and use a funnel to fill the radiator completely. If the temp gauge goes over 50% ever it's safe to assume you have a cooling issue. I hope getting your radiator properly filled with coolant fixes the issue. If not check for leaks in the water pump hoses etc. Check the thermostat.
Sounds like you have a double problem . First locate the radiator fan relay it should be in the fuse box change the relay. Also change the tempature sending unit (attached to radiator) . If your car is overheating . You need to check. For a leak, be sure you have enough. Fluid in radiator, check. Thermostat , change it anyway cheap enough, ( 16 lbs. pressure ) this should solve your problem
There is a air pocket in the heater core, you just didn't burp it right.
Open the hood of your car. Secure the hood with the
safety handle. If you have a newer car, you should have a bleeder valve
on the front of your radiator. Check in your owner's manual for the
location of this valve. If you do start your car, open the valve with
wrench and let your car heat up. The excess air will bleed out of your
cooling system. Keep your car on long enough to give the (trapped air)
time to bleed out of your system.
Let your car cool down. Once the car is cool, take
off the radiator cap. Did the level of the radiator fluid go down? If it
did, it means you bled the air out of your cooling system. Replace the
radiator fluid, turn on the car, and let it run. Replace radiator fluid
Step 3 (above) is the way you will remove air from your cooling system if you do not have a bleeder valve on your radiator.
You will leave the cap off the radiator. You will run your car until it
heats up. As the air dissipates, the radiator fluid level will go down.
You will fill up your radiator fluid to the correct level. Be careful
because the heated radiator fluid will be hot. Always wear leather
gloves and safety goggles when working on your radiator.
Once the air dissipates and you fill the fluid, shut off the car. Let
the car cool down. Once the car is cool, put the radiator cap back on
the radiator. You may have to put more radiator fluid in the radiator.
The level may fall as the car cools down. Now it is safe to drive your
car. You have removed the trapped air from your cooling system.
Always wear gloves and safety goggles when working on your radiator.
Radiator fluid gets very hot when heated.
Check radiator fluid periodically.
no heat engine running hot sound like faulty thermostat which is sticking closed.if thermostat stuck closed no coolant can circulate through the engine block and radiator causing no heat condition and engine overheating.replace thermostat and radiator pressure or surge tank over jug cap see what happens.
This is usually caused by air in the cooling system. While the engine is cool, check your fluid level in the coolant tank. Then check the radiator to make sure it is full. If both of them are full, the system has to be bled. To bleed the system, take the radiator cap off, start the engine. If there is air in the system it will bubble out and the fluid level will drop, add coolant until this stops.
Check the sensor which controls the cooling fans that cools the radiator it prevents the engine from over heating and allows the temp gauge to stay at normal range.recently had problems with my 2003 impala overheating it was the sensor had the thermostat replace as well.