Question about 2000 Hyundai Elantra

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Car runs hot;spews water into overflow reservoir and won't come back.head gaskets replaced and hoses,tuned up with new wires and plugs.car is a 2000 elantra

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  • mike loshbough
    mike loshbough May 11, 2010

    are they coolant fans working

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Hi, take out the thermostat as it seems to have jammed also check for blocked waterways and check the rad is not blocked.

Posted on Mar 02, 2009

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Losing coolant


Wait for the cooling system to cool down. Remove the radiator cap, start engine and watch for bubbles in the tank. If you have bubbles the possibilities of a bad head gasket is suspected. To verify a suspected head gasket, leave the radiator cap on and tighten. Start the engine, using a heavy towel or rag loosen the radiator cap SLOWLY. If pressure is evident only after a minute of running.....=Blown head gasket!

Jan 22, 2014 | Chevrolet Malibu Cars & Trucks

1 Answer

Have a 2000 chevy cavalier. new water pump, new t-stat, new head gasket , new coolant, still running hot


Two ideas.

1. Try a new radiator reservoir cap (trust me, it is very important in holding pressure which keeps the coolant from boiling out).

2. This one you will need an entire weekend to spend on this. You need to remove the thermostat and replace the thermostat housing. pull one of the radiator hoses and attach a garden hose with good pressure. It needs to flush for at least 20 minutes. Then switch directions and flush water where was coming out. Then put it back together and drive until it gets hot. Allow it to cool for 45mins (to prevent engine from cracking due to rapid cooling) and repeat until no crud comes out when flushing.

May 30, 2011 | 2000 Chevrolet Cavalier

1 Answer

The fluid in radiator back up to the secondary plastic reservoir after 15 minutes when the car start. Then,steam came up on the tube located at the top of the plastic reservoir(that tube supose to drain...


Well, your vehicle is overheating. Are either of the electric fans running when the vehicle is turned on? Are you leaking any coolant around the water pump? When the vehicle is cooled off, feel of your main radiator hoses, the top one should be soft and pliable and the bottom one should be more rigid. It should feel like it has ribs in it. If it feels like the "ribs" in the bottom radiator hose are flattened and not round then you need to replace it. Also check the water level in the radiator when the vehicle is cooled off completely. You may just be really low on water. The overflow tank is only accurate when the radiator is full and working properly. Does the water blow out the overflow violently or just steam. If it is boiling out violently then you most likely have a bad head gasket. Check the exhaust when it is running and see if it is dripping water or releasing a lot of water vapor. If either is yes than you probably need head gaskets. Start with the easy problems and work your way up. Check every heater and water hose on the vehicle for leaks. Also take a flashlight and look all around the engine for steam after it has started overheating ( shut the car off first so you can hear the leaks and find them easier.). Don't take too long running it hot. It is mostly an aluminum engine and you can do major damage overheating it too much.

Apr 24, 2011 | 1990 Chevrolet Cavalier

1 Answer

Water from the radiator reservoir comes out the overflow hose. A new radiator cap did not solve the problem.


when vehicle gets hot and has too much fluid it dumps what itdoesnt need then later as it cools it sucks back what it needs sounds like the level of fluid in reservoir is too full only fill to line on jug....also inspect overflow hose...unless it is overheatingthe rad cap is pressure sensitive....if this is problem thermostat stuck closed replace thermostat.

Mar 23, 2011 | 2000 Chevrolet Cavalier

2 Answers

The water pump was replaced,thermostat replaced,car spews water from the overflow tube and emptys the water from the engine!


Probably either head gasket blown, or crack in head or block. Have you had the engine hot lately? Look for white smoke out of exhaust that will confirm head gasket or cracked block or head.

May 01, 2010 | 2000 Pontiac Sunfire

2 Answers

First Steam then Water coming out of the overflow hose of the radiator reservoir. Is this a thermostat problem or Waterpump. When water is coming out the dash thermometer is approx half way. When I remove...


Your overflow hose is at the first tier after the seal on the radiator cap. The first thing I would check is the cap gasket, then make sure the cap is completely installed, push down hard and turn until it locks into position. If your water pump was bad, you would either be leaking water from the pump, or your car would be running hot. Usually, when you have steam/water coming out the overflow, if it is not a problem with the cap, then you are indeed running hot. If the thermostat is not opening or is stuck in the closed positiion, it will not cause your radiator to overflow, however if it is sticking closed and allowing your car to overheat then opening at a higher pressure, it could happen. Check the components in this order, gasket, cap installation, then thermostat, (you can replace the thermostat for about 10 dollars. Good luck

Oct 06, 2009 | 2000 Mazda 626

2 Answers

1997 Cadillac Deville Overheating


Yes it can be the head gasket,one way to tell,is make sure the engine is cold,like in the morning.Take the rad.cap off,add water until full.Turn over the engine and let run,while looking at the opening(where the cap goes).Is the water coming out like really fast,maybe as much as a fountain?If so,then it is a head,or head gasket.If you would like to bleed system of air I can tell you how.If there is air in the cooling system,it will run hot.With it cold,or cool,not hot or real warm,fill the reservoir with water up to 3/4 full,over the fill mark.Fill the radiator full,and replace radiator cap,and reservoir cap.Make sure the hose from the reservoir to the radiator is in good shape,no holes or crimped anywhere.start the engine with the ac off.At this point the cooling fans should not be on.There not supposed to be on unless you straight wired them.Before the fans come on by themselves,or the vehicle runs hot,and right before not to soon,cut the car off.Go in the house and get on computer for about 30 to 40 minutes,and go back out side and check the water level in the reservoir.Is it down?if so add more water and repeat process until engine runs at normal temp.The fans should come on,and go off on there own,with the ac off.Let me know the out come.

Aug 28, 2009 | 1992 Cadillac DeVille

2 Answers

Water not staying in Radiator


yes, not having an overflow reservoir for your radiator will cause you to lose water. As your engine warms up the water expands and creates pressure in the cooling system. When the pressure reaches a certain point(usually about 15 psi.) the radiator releives the pressure by releasing water into the overflow tank. When the engine cools back down the water shrinks pulling water back into the radiator from the overflow. If there is no overflow, the everytime the engine warms up on a drive water will be lost and not recovered on cooldown.

Jun 04, 2009 | 2000 Hyundai Elantra

2 Answers

'97 subaru overheating


head gasket most likely.

Aug 21, 2008 | 1997 Subaru Outback

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