Question about 1998 Cadillac Seville

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My car is overheating but it has coolant in it. why is it doing this??

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Why do you suspect overheating? Give us a lot more,past problems,repairs and what symptoms you have.

Posted on Sep 30, 2009

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Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.

Posted on Oct 03, 2009

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The most common cause of this is a stuck thermostat which would not allow coolant to circulate through the system. some other possibilities are: air pocket in the system, cooling fan not operating, broken water pump , clogged radiator, poor serpentine belt tension (though you would probably notice other symptoms as well if this were the case such as poor power steering)

Posted on Sep 30, 2009

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Posted on Jan 02, 2017

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2 Answers

How far can i drive when my 2001 alero is overheates


The more you drive it during the overheating the more damage you will do to the car. Running out of gas wil not cause overheating. Wrong type of antifreeze/coolant will not cause it to overheat either. Wrong coolant/antifreeze may cause corrosion over time to some engines. When you notice it getting hot, stop as soon as you can safely. You may have a problem with the thermostat, coolant leak, bad head gasket, bad water pump, bad fan or fan relay or fan thermal switch, clogged radiator, leaky radiator. I would have to know more about the syptoms to give more insight.

Jul 10, 2014 | 2001 Oldsmobile Alero

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Hi, My Audi A6 is overheating and the coolant is


Fan turns on when you turn the AC on, and when coolant gets too hot (over middle of the instrument).
White smoke in exhaust means coolant gets into the cylinder, typically head gasket or crack.
Is the upper radiator hose (the one that goes to the coolant expansion tank getting very hot? Observe when car is warming up. When coolant temp gauge needle is in the middle, the upper radiator hose should get warm; also the radiator (you can touch the top and check) should get warm at that time. The means that the thermostat opened as it should (when engine warmed up). If it does NOT get hot, then the thermostat is stuck closed, which can lead to overheating. Still, the fans should kick in.

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Overheating


OVERHEATING CAN BE CAUSE BY MANY THINGS LIKE FAULTY THERMOSTAT AND FAULTY RADIATOR PRESSURE CAP,TOO MUCH WATER IN COOLANT SYSTEM NEED 50 / 50 WATER AND ANTIFREEZE.LOOK FOR WATER PUMP WEEP HOLE LEAK, IF COOLANT LEAKING OUT WEEP HOLE WATER PUMP BAD NEED REPLACING.CHECK FOR LOW COOLANT LEVEL, YOUR RADIATOR OVERFLOW JUG SHOULD HAVE COOLANT AT THE FULL COLD MARK IF NOT KEEP ADDING COOLANT INTO COOLANT OVERFLOW JUG UNTIL COOLANT STOP DROPPING AND FULL COLD MARK, IF OVERFLOW COOLANT JUG WAS EMPTY RADIATOR IS LOW ON COOLANT.WHICH CAUSE AIR IN COOLANT SYSTEM KEEPING THE ENGINE COOLANT TEMPERATURE SENSOR FROM BEING SUBMERGE IN HOT COOLANT WHICH TURN ON THE COOLANT FANS.WHEN ENGINE COOLANT TEMPERATURE GET CERTAIN SET TEMPERATURE LIKE 190 DEGREES THE PCM AND COOLANT SENSOR WILL TURN ON COOLANT FANS, IF VECHICLE OVERHEATING COOLANT FANS NOT WORKING EITHER YOU HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR CHECK COOLANT FANS FUSE AND RELAYS. YOU CAN CODE SCAN CAR TO SEE IF YOU HAVE FAULTY PCM, FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR FAULTY COOLANT FAN RELAY.IF COOLANT FAN AND ENGINE COOLANT TEMPERATURE SENSOR OKAY,YOU HAVE CORRECT COOLANT LEVEL IN COOLANT SYSTEM, THERMOSTAT AND RADIATOR PRESSURE CAP BEEN REPLACED, YOU COULD HAVE BLOWN HEAD GASKET CHECK ENGINE OIL LOOKS LIKE MILK SHAKE HEAD GASKET BLOWED ALSO WHEN HEAD GASKET BLOWED YOU CAN DRIVE CAR SHORT DISTANCE START OVERHEATING AND YOU LOOSE ENGINE POWER SUSPECT BLOWED HEAD GASKET.

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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.

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1 Answer

My leganza is over heating, could you tell me what I should do?


Is it overheating or just a gauge malfunction? Are you low on coolant? Check at coolant tank. If it is overheating, check for coolant leak at hoses. If no luck there, you might have a head gasket blown. Do you see white smoke coming from tailpipe? Do you see milky substance on dipstick or in coolant tank? These are signs that your head gasket has failed.

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My one peice belt broke on the motor the car overheated


replace coolant tempature sensor :) be careful not to over torque

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Where do you put engine coolant? I think mechanic


If the car is overheating it is not just cause the coolant is low. There is a leak somewhere in the system this must be fixed first.

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Sounds like your car is overheating, do you have any coolant leaks? If you are leaking coolant possible causes are radiator and or hoses or waterpump. If you are not leaking coolant you probably have a faulty thermostat that is stuck closed and not allowing coolant to circulate into the motor.

Hope this helps

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