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When i changed thermostats i believe it got a air pocket in the lines because it keeps over heating and the temperture gauge goes up real quick and still overheats

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(start the engine from cold) You may need to remove the rad cap and start the engine, if you have air in the system you will be able to see it escape as the engine warms-up. keep an eye on the water level and when it runs over and out of the rad turn the engine off then replace the rad cap (ensure the engine is cool enough to do so) If that hasnt solved the problem it could either be that the water pump isnt working, the head gasket has gone, or you have a major blockage in the cooling system.

Posted on Sep 15, 2010

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3 Answers

I have Hyundai Elantra GT Manual transmission, the Temperature gage keeps going all the way to high yet the engine is not over heated, and once I change gear the temperature Gage drops to normal and t


Changing gears and the temp gauge have nothing in common. First, check the coolant level. If gets low an air pocket in the engine will cause the gauge to go high, then back to normal. Next would be to check the wiring. could be the gauge/sensor wire is shorting to ground.

Oct 25, 2014 | 2005 Hyundai Elantra

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My 1999 Chevy Malibu runs hot? It started when it overheated. We changed the thermostat, then water pump, then temp sensor gauge and the temp gauge goes high but only when the heater stops blowing hot...


Air pockets will make the guage do that, and also cause your heat to come and go. Also, a poor radiator, as in rotting, or plugged up, will cause high temperature issues.

Sep 20, 2011 | 1999 Chevrolet Malibu

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It takes over 30 minutes to get heat and the temperture gauge goes just below hot and then returns to the middle line.


It sounds like the therostat is bad or the wrong temperature rating thermostat was installed.

Dec 20, 2010 | 2005 Kia Sedona

1 Answer

My temperture gauge on the dash is reading as if my cars over hea


There's probably air in your system. Next to the water pump is a stand pipe with a bleeder screw. Loosen this and run the engine until coolant starts to bubble out. Air in the system will keep coolant from flowing and the engine will over heat.

May 12, 2010 | 2006 Pontiac Grand Prix

2 Answers

Why does my thermostat gage keep going from cold to hot constantly


I really would like some clarification on that.
If your inside gauge seems to read cold for a while and then just goes hot it generally means either the gauge is sticking or much more likely the thermostat is sticking because it is about to go bad. Actually it has gone bad already if it is staying closed. Now most thermostats have a little bypass hole to let air and small amounts of water through to circulate all the time. this allows the hot water to actually reach the thermostat when it is mounted somewhat from the heat source. If that hole becomes plugged it will give the same effect since the entire engine has to get hot before the thermostat can even start opening. Once it starts opening it gets a rush of super hot water that slams it wide open.
If you don't notice any problems with the engine like water boiling over or any other strange behavior then it is likely the actual gauge in the dash sticking or the sensor malfunctioning.
What you want to do is take a laser temp gauge and get a temp reading off the radiator when the engine is reading hot. this will give you an idea whether or not it is lying to you. bring it over and ill lend you mine. ;)

Apr 19, 2010 | 1999 Acura Integra

3 Answers

Temp gauge up and down


It is IMPORTANT That you Correct This ,as Engine Temp is Important. I Recomend the Coolant Temperture Sensor Be Replaced to Correct this.

Sep 11, 2009 | 2003 Dodge Stratus

1 Answer

2006 pontiac grand prix vary little or no heat


Are you sure you got all the air out of the cooling system? Air pockets are very common problem when you do any work to the cooling system. An air pocket will do what you discribe.

Mar 18, 2009 | 2006 Pontiac Grand Prix

2 Answers

Temp gauge goes up when stopped and goes back down when cruising.


Your thermostat is either defective or your cooling fan is not engaging on the right tempertures (sensor)

goodluck

Feb 28, 2009 | 2004 Kia Sedona

2 Answers

Thermostat?


It actually sounds to me like you're low on coolant. My Jeep leaks coolant and whenever it gets low the temp gauge will go real high and then drop, and the heater doesn't work well. This is because the cooling system of your car is supposed to be a closed system, full of coolant and no air. When coolant leaks out, the space it used to occupy is now occupied by air, which does not transfer heat well. When 'air' is passing through your cooling system, no heat can be transferred from your engine to the heater and radiator, resulting in a hot engine and no heat at the heater. Then when a pocket of water passes through the system, the temperature gauge quickly falls as the water absorbs the heat from the engine. The hot water that cools the engine is where the heater gets it's heat from as well, so when water passes through the heater core, the heater works, but when it's filled with air, it doesn't.

Hot water runs through the heater core regardless of whether or not your thermostat is open or closed. That's why your heater works in the winter even before the engine is at normal operating temperature. The fact that the heater stops working is a good sign that the thermostat is probably not the culprit.

As for the water pump. If the water pump was bad, your temp gauge would go into the red and stay there. Water pumps generally don't work intermittently. Either it's good and ot works, or it's bad and it doesn't.

However, if you are in fact low on water, as I suspect, it means you probably have a leak somewhere. The leak could be in the water pump housing gasket, so depending on where you take it for repairs, they may try to sell you a new water pump anyhow. So just beware of that.

Feb 12, 2009 | 2004 Chevrolet Blazer

1 Answer

Temperture Gage


First of all, it doesn't sound like your thermostat is working correctly to keep good hot/warm air coming , so I would change that, or have it changed for better heating inside. If you lift the hood & look in front of your radiator, On the engine side, you'll see a fan attached to, or in front of the radiator. It won't come on until the coolant temperature gauge gets up to proper operating temperature. Without getting in to too much detail, have your thermostat changed, and my guess is everything else will start working as it should, and whoever does the work, should know enough to check the fan operation when they do the thermostat.

Jan 28, 2009 | 1991 Mazda Protege

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