Question about Hyundai Motor 1999 Elantra

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Overheats sometimes the gauge was saying its hot. checked it after it cooled off. it was low on coolant. filled it and started it up and let it run ,then it starts overheating again.

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  • You may have a coolant leak
  • You may have a stuck thermostat
  • You may have a bad water pump
  • You may have a stuck radiator
  • you may have air in your system
  • you may have a bad leak
  • you may have all of the above
i hope this can help point you in the correct direction

Posted on Jun 04, 2010

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Posted on Jan 02, 2017

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Overheating


hello my8,
First confirm that the engine is actually overheating - steam, no heat to the interior etc. Sometimes a temperature sensor will fail and give a misleading 'overheat' reading on gauge. For that matter sometimes the gauge can fail and give the same misleading reading. Check that the cooling fan comes on when the engine temperature starts to rise above 'normal'. If not check (in order) fan fuse, fan relay, fan sensor, fan. Real overheating is caused by a lack of coolant AND/OR lack of coolant flow. Modern cooling systems are 'closed'. In other words there should be little or no loss of coolant. If the level is significantly low you have a leak....either external or internal. With the coolant topped up to the correct level and the radiator cap on, run the engine and look for visible leaks...hoses, valves, radiator etc. Internal leaks, eg. head gasket will usually be accompanied by white exhaust smoke (steam), hard starting, rough running and bubbles in the expansion tank. Sometimes, though NOT always, you will fiand the engine oil has a milky look and/or engine oil will be mixed in with the coolant.

Lack of coolant flow can be caused by anything in the system that causes an obstruction......in order of common occurance......thermostat stuck closed, radiator blockage, heater core blockage, water pump failure. One last point. because of design considerations many vehicles have the radiator mounted at a different level than the uppermost coolant passages in the engine thus trapping air in the coolant passages. In short the system must be bled of air in order to properly fill with coolant. Such systems will incorporate bleed screws usually in either the top/side of the radiator, the top hose, the thermostat housing and sometimes in all of these points. To bleed out the air do NOT run the engine as you fill the radiator. Instead, open all bleed screws. As you fill the radiator coolant will run out of one or more bleed points. Close this bleed point(s). Continue to fill until coolant escapes from the next bleed point then close that one. Proceed until coolant has escaped from ALL bleed points then continue to fill to the correct level. The expansion tank will have minimum and maximum level markings. Fill only to the minimum level mark with the engine cold.

hope helpful,
greetings

Nov 10, 2011 | Cars & Trucks

1 Answer

Have bmw 320i 2001 only 55570 miles. even driving after 10 miles engine get hot. no problems with driving , no warning light but it stays hot even after2 hours. please need advice. car was checked


This bmw is overheating , even after 2hrs, the engine will still be hot after it verheats. the basic thing to do first is to allow the engine to cool down 5-6 hours or even overnight.then check to see if the cooling system is full of coolant. this problem may be caused if lets say the coolant level is low, this can happen if theres a leak in the system. if low fill system and then have it checked for leaks.another problem if the system is not low then you may have a bad thermostat, a bad thermostat will not allow the coolant to flow inturn making engine overheat, the the last common problem could be a bad fan, start in the order i listed as far as the thermostat watch the gauge and feel the lower hose, if the gauge goes to hot and the lowe hose is luke warm or cold and the top radiator hose is hot then the thermostat is bad. the last test is for the fan, if the top hose and the lower hoses are hot and the car is starting to overheat then it may be the fan, see if the fan is spinning, this car may have an electric fan or belt driven fan, if its electric then see if its running, if the fan is not running then testing need to be done to see why, the fuse and the relay will need to be tested and then the fan itself. if the fan is belt driven then you will see if the belt is on the fan pulley and then check the fan clutch, the way the fan clutch works is the fan will run at a slowwer speed than the engine and then when the heat from the radiator gets hot and blows on the front of the clutch this causes the fan clutch to lock up and makes the fan spin faster. check to see if this is happening but if this were to be the problem or if the fan was aproblem the car would not overheat as you are driving rather it would overheat at a stop or in slow traffic because the air flow from the driving would act like a fan as the air flows through the radiator from driving this would cool the engine if it was the fan, but if the car overheats even while moving then it would not be a fan problem but rather the thermostat or low coolant. there is another problem but i would start with these. hope this is helpful.

Oct 02, 2011 | BMW Cars & Trucks

1 Answer

LOW COOLANT LIGHT COMES ON SOMETIMES AND TEMP GUAGE SHOWS ENGINE GOING TO OVERHEAT. HEATER GETS COLD. IS IT THE THERMOSTAT?


There may be a thermostat problem, but your symtoms indicate low coolant level. When coolant is too low, it will not circulate, so you get no heat in car, and the coolant remaining in engine block overheats because no cool fluid coming in.
You need to fill the system up properly then look for leaks.
With cold engine, open radiator cap. Fill with antifreeze directly in radiator. Start engine, top up rad if level drops. Put heat control on Hot. Fan on low, heat on high. Gently rev engine and top up rad as needed. IF as engine heats up, it starts kicking fuild violently out of radiator, then the thermostat is bad. if not, then recap radiator, top up overflow bottle and you're done. Look under car for any sign of leaks. Steady dripping indicates a leak, then address that.

Feb 27, 2011 | 1998 Chevrolet Monte Carlo

2 Answers

Having issues with a 2000 chevy impala overheating have changed the radiator and the thermostat fans seem to be working ok but overheats at idle in stop and go traffic, after a certain amount of time it...


YOU NEED BLEED COOLANT SYSTEM.CHECK COOLANT LEVEL IN RADIATOR.ADD MORE DEXCOOL UNTIL COOLANT LEVEL IS CLOSE TO RADIATOR SPOUT.CRANK ENGINE LET IDLE UNTIL TOP RADIATOR HOSE GET HOT.WATCH TEMPERATURE GAUGE.IF TEMPERATURE GAUGE START RISING TO HOT ZONE.TURN OFF ENGINE.LET COOL DOWN.USE LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL ALL PRESSURE RELIEVED.REMOVE RADIATOR CAP.ADD MORE COOLANT.CRANK CAR AGAIN LET IDLE UNTIL TOP RADIATOR GET HOT.KEEP EYE ON TEMP.GAUGE ALSO.WHEN TEMP.GAUGE STOP CLIMBING.YOUR COOLANT SYSTEM BLED.WHEN DONE LET CAR SET A WHILE CHECK COOLANT LEVEL.ALSO FIRST THING IN THE MORNING CHECK COOLANT LEVEL AGAIN.AND BESURE ADD COOLANT IN THE OVERFLOW JUG TO THE COLD MARK.DONT OVER FILL THE COOLANT RESERVOIR JUG.WORK SAFELY DONT GET SCALDED.

Feb 15, 2011 | 2000 Chevrolet Impala

1 Answer

When it is very hot - 35 deg.C - and the van runs very well and suddenly it cuts out and does not want to start again until the engine cools down. It only happens from time to time and not on a regular...


Have you checked the coolant level? If it is low fill it up and check for leaks. Low coolant can cause the car to overheat and shut down. IF the coolant level is ok you could have a bad thermostat/sensor. Its job is to shut the car off if it thinks it is over heating.

Feb 03, 2011 | Renault Sportwagon Cars & Trucks

1 Answer

My 1992 lexus es 300 overheats after i get off the freeway. the temp gauge sits in the normal position until i get off the freeway. i run the heat on hot and at full blast regardless of the temp outside...


Sounds like you could be low on coolant, even more so because the air starts to cool down, check coolant level with engine cold, never open a radiator when hot.

Sep 17, 2010 | Lexus ES 300 Cars & Trucks

1 Answer

1991 Dodge Spirit Check gauges light comes on when accelerating. Car seems to get hot according to the gauges and then cools immediately down.


The first thing you should check is your coolant level. If it is low add coolant. Next start and leave the car warm up to temperture and make sure the coolant is moving, have radiator cap off and watch the coolant. What you are probably going to find is that when the car is warming up or warmed up that the coolant will be low causing an air lock in the system. When the air locks happen you will find a overheat or running hot situation. This is due to air will not cool the sytem you need coolant so when the air hits the sensors under acceleration the gauges go high and cause the check gauge light to come on.

Feb 05, 2010 | 1991 Dodge Spirit

1 Answer

Heater not blowing hot air changed thermostat and now car overheats


did u bleed the air out of the cooling system? if not dop this procedure and recheck for problems.
The generic method of bleeding air from the cooling system is to use a floor jack and raise the front of the car as high as poss, then fill the coolant recovery tank full and run the engine until it just starts to overheat, high end of normal zone on gauge, then shut the engine down and run cold water over the radiator core, this will self bleed the system and the coolant will be pulled from the recovery tank, repeat as necessary, never let the recovery tank run dry or more air will be pulled into the cooling systeml , if it still overheats then you need to have the head gaskets checked with a gas analyzer for hydrocarbons present in the radiator or recovery tank

Jan 11, 2010 | 2000 Dodge Neon

2 Answers

HOT OR NOT


You really need to look at Edmonds.com for the Recalls, Service Bulletins and Complaints on this Blazer! Luckily I found a Buyer for Mine Before it Got Worse! Not that it was Good!

Feb 03, 2009 | 2000 Chevrolet Blazer

2 Answers

Its runnining close to hot on temp gauge and after i parked it from driving home fom work i saw some smoke coming from under the hood


If smoke, you may have a leak in a hose. When cool, check for water marks usually coming from the connection to the radiator. Another thing to do but may be dangerous is to load up the radiator with water and start the engine, let it run for about 15min for it to heat up and look for water spray. Also, when parked, is there a puddle of water under the car?

Also, I would check the water level in the radiator (never open when hot), to see if i need to add water. Don't look at the reservoir as a reference. It could be just low.

The key here is you think there may be smoke coming from the hood.

Another thing, if the radiator is full of water, then it could be your thermostat. it is usually located at the end of the top hose which runs from the radiator to the engine. In this picture, you are looking at the top of the engine looking down. This is the location of the Thermostat. If your vehicle is close to over heating, this valve could be getting stuck.
46587e0.jpg
As a test, remove the thermostat and try driving it around to see if it gets close to overheating.

Aug 03, 2008 | Ford Aerostar Cars & Trucks

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