Question about 1999 Mitsubishi Mirage

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I replaced the thermastate in my 99 mitubishi marage de and now it over heats and sucking the coolant out of my radiater what can cause this problem

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  • Master
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It means the one you put in is bad or the wrong type temp range.. causing it to not open when it should causing the coolant to boil off quicker.

Posted on May 05, 2010

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  • Mitsubishi Master
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Improper installation of thermostat and radiator cap seal is bad.

Posted on May 05, 2010

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1 Answer

My 99 grand am is overheating. I changed the thermostat and it still over heats. what else can cause it to overheat?


How hot does it get in degrees F? Does the radiator fan work? Some fans won't turn on till about 220 degrees F.
Could have blockage in radiator or engine block? Check the water pump. Your serpentine belt ok? Could be gasket issues? Any coolant in the oil or oil in the coolant. Check your coolant temp sensor. Don't replace anything unless your testing points in that direction. Are you losing coolant?

Nov 04, 2016 | 1999 Pontiac Grand Am

1 Answer

Why would the storage tank boiling over ?


The vehicle's cooling system is a closed system but when the coolant gets hotter, it expands and needs to get out. And then it needs to go back into the cooling system when the engine cools down.
This happens at the radiator cap on the top of the radiator. Under the cap is a spring loaded stopper that presses against the opening to the radiator. The rim of the cap also seals tightly against the top of the radiator opening collar.
When the engine heats up, pressure inside pushes the spring loaded stopper up and coolant escapes. It gets past the stopper but cant get past the rim of the cap. There's a rubber tube that is connected to the collar and the other end of the tube goes to the bottom of the storage tank.
In order for the system to work properly, the radiator must not only be able to release extra pressure. It must also be able to suck the coolant that has escaped back in through the same tube.
If the tube has a hole in it somewhere, the coolant will still get out ok when the engine heats up but when the engine cools down again, instead of sucking the coolant back out of the storage tank, it will suck air through the hole in the tube. You need to replace the tube and make sure the new one is properly sealed to the nipple on the side of the radiator collar and to the nipple on the storage tank.

Mar 17, 2015 | Cars & Trucks

1 Answer

06 jeep over heating


what have you done to the rig work wise? most common probs with overheating is thermastate, water pump, low coolant, you can have a head gasket problem or a blockage in the radiator or coolant passages hoped this helped but if you could get me more info like is it leaking? if so where? i can narrow it down for you lo

Jul 22, 2012 | Jeep Cars & Trucks

1 Answer

Cost to replace upper radiator hose 2002 Jag s-type Had oil changed and was told inspection revealed upper radiator hose leaking. replacement $360.00 plus tax. I have had no signs of thermastate...


it could be a weeping leak......that has not become so bad that the coolant is causing air to get into the system and run hot....the hose is about 130 bucks and about 1.5 hours to change...then coolant is 20.00 per liter from dealer so 360 is pretty close to the actual charges.But open the hood and let the car reach temperature and look for the hose running up the back of the from top to bottom.and see if you smell any coolant.

Aug 30, 2011 | Jaguar S-Type Cars & Trucks

3 Answers

Took out the thermostat, replaced the radiator, the water is circulating in the radiator but it is still running hot. what do i do next?


Overheating can seriously damage a car's engine if left unchecked. Although overheating simply means that a car's engine temperature exceeds normal operating temperatures, the causes of overheating are varied. What follows is a brief list of some of the most common causes of engine overheating.

    Faulty Radiator
  1. A car that overheats will often have a faulty radiator. A radiator is responsible for cooling hot engine coolant that picks up heat from inside a car's running engine. A radiator "radiates" the heat from engine coolant out into the outside air. A faulty radiator loses its "radiating" effects and allows engine coolant to become overheated, thus rendering it ineffective at adequately cooling and engine.
  2. Faulty Water Pump
  3. A faulty or malfunctioning water pump prevents adequate engine coolant flow and can cause a car to overheat. A water pump serves to pressurize and propel engine coolant throughout a car's engine and radiator to increase the heat-reducing capabilities of engine coolant. A faulty water pump loses its ability to adequately pump and propel engine coolant, and can cause a car to overheat.
  4. Coolant System Leaks
  5. A leaky engine coolant system reduces the level of circulating engine coolant, which increases engine temperature and leads to engine overheating. Radiators, water pumps, and coolant system hoses and seals--all of these coolant system parts can develop leaks, which can result in low coolant levels and engine overheating.
  6. Faulty Thermostat
  7. A car thermostat regulates the flow of engine coolant. A thermostat is a heat-sensitive valve that opens when a car engine reaches a set operating temperature and closes when a car engine is cold and warming up. If a thermostat gets stuck in the closed position, coolant will be prevented from reaching the engine, which will quickly lead to engine overheating and potential engine damage.
  8. Low Engine Oil Level
  9. Engine oil, in addition to lubricating an engine's internal parts, helps to keep engine operating temperatures reduced by eliminating friction within the engine. If engine oil levels are low, friction and heat build up inside an engine, a condition that causes increased engine operating temperatures and can lead to engine overheating.

Jan 15, 2011 | 1998 Isuzu Rodeo

1 Answer

My car is over heating we change the thermast and the upper radaitor pipes?Why is it still overheating?


make sure the coolant contains enough anti freeze and that the radiator cap is sealing, coolant mixture is very important in german cars

Nov 10, 2010 | 2000 Volkswagen Jetta TDI

1 Answer

It over heats we replaced the thermistate (spelled wrong)flushed the radator still over heated took thermastate back out left it out it worked good but now is over heating again


CHECK WATER PUMP WEEP HOLE SEE IF ITS LEAKING ANTIFREEZE IF SO WATER PUMP SHAFT BEARING GOING BAD CAUSING WATER PUMP LOCK UP HARD TO TURN.MAKE SURE DRIVE BELT NOT SLIPPING DUE TO BAD BELT TENSIONER.CHECK TO SEE IF COOLING FANS TURN ON WITH AIR CONDITIONER ON HIGH.IF NOT CHECK HEATER + AC IGNITION FUSE.IF FUSE GOOD.YOU HAVE FAULTY COOLANT TEMPERATURE SENSOR.IF ALL LOOKS GOOD.CHECK ENGINE OIL IF LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.IF OIL LOOKS GOOD.YOUR ENGINE CYLINDER BLOCK WATER CORES CLOGGED UP WITH RUST RESTRICTING COOLANT FLOW THROUGH THE ENGINE BLOCK TO REMOVE HEAT AWAY FROM THE ENGINE.BLOCK PROBABLY NEED FLUSHED OUT AT RADIATOR SHOP.

Jun 23, 2010 | 2001 Pontiac Grand Am SE

1 Answer

Thermastate and high heat


Yes i would check if your radiator fin turns on when the engine gets warm.
Most likely thats the cause.

Jul 11, 2009 | 2002 Jeep Grand Cherokee

1 Answer

Coolant leak from upper radiator hose where it meets engine


thermistate housing is the place you refer to it fuction is to hold a thermastate to open and close water flow at 150 to 190 degree according to car spectif the thermaste sticks it causes overheating and can blow the thermastate gasget, the tole cost is about 30$ at most for the thermastate and gasget...now many other things can cause a car to over heat and cause a hose leak and somtimes it is simple to just tighten the hiose clamp at the thrmastate and problem sovled see a water leak causes the radiator to lose presure and thus with out a sealed tight water cooling system the boiling point of water is lower and thus the car over heats when in doubt stop by the local gas station and have a tech take a quick look as it could be simple as the hose clamp difficult as a therm,astate but do not let it go to warp a head gasket as this blown headgasket is what is the end results of running a car to hot

Jul 03, 2009 | 1999 Mercury Grand Marquis

2 Answers

Car suddenly started overheating


Welcome to fixya

this could be cause by the thermastate or the fan could not be working i would replace the thermastate and check fan make sure it is running when the car heats up

Aug 29, 2008 | 2000 Hyundai Elantra

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