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Overheating,reserve coolant tank boiling - 3000GT Mitsubishi Cars & Trucks

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  • josenene16 Jan 12, 2009

    I put a new radiator, took off the thermostat and still the car overheats and coolant boils in water reserve tank and it drips

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  • Mitsubishi Master
  • 331 Answers

Its your head gasket

Posted on Oct 12, 2008

  • alex metro
    alex metro Oct 12, 2008

    sorry, if you take cap off the overflow does it bubble before the car overheats? if so its the head gasket. does the fan kick on? also turn the heater on full when the car is hot, if it doesn't blow hot air, its the thermostat

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6 Suggested Answers

  • 1335 Answers

SOURCE: overheating,reserve coolant tank boiling

The drive belt slipping could be contributing, but it still sounds like the water pump. I would get it fixed before you do some real damage to the engine. Sorry.

Posted on May 04, 2009

  • 718 Answers

SOURCE: overheating,reserve coolant tank boiling

Ford 2000 Taurus

To solve the problem you have the things to do in this order;

) When the engine is cold top off the radiator with fluid. (When the pump was replaced the fluid should have been also)
) Make sure the radiator fluid has anti-freeze in it. This is also anti boil also !
) Add fluid to the overflow reservoir.
) Make sure the drive belt was replaced on the water pump.
) With the engine running, you can add fluid to the radiator for the first minute or so. You want to get air pockets out.
) Replace radiator cap.
) Let car warm up. When it's hot you should get the radiator fan coming on.
) When it get hotter the air-conditioning fan may come on.
) If the fan does not come on, the heat sensor is probably bad.
) If all fans come on, and it overheats, you may have a bad thermostat. Trace the upper radiator hose to where it connects to the engine. That's where it located.

Do not operate the engine when it overheats, You will damage the head gaskets and cause radiator fluid to leak into the cylinders.
If you smell radiator fluid in the exhaust fumes, it may already be leaking.

Posted on May 07, 2009

michigan man
  • 3533 Answers

SOURCE: 1990 overheating in traffic reserve tank boils over

its the housing behind the upper radiator hose before you change it check to see if you have a crack in the bottom of the anti-freeze cooliant bottle also try this website www.alladtadiy.com to see if you can get more information also checkout this website www.autozone.com

Posted on May 29, 2009

  • 7 Answers

SOURCE: my car overheat very high. my reserve tank will

Without having too many details, I would say check the thermostat. I had the same problem in my Eclipse. I took the thermostat out and haven't had any problems since.

If you don't change your radiator fluid often, it causes the thermostat to gum up and stick. If it sticks in the closed position then no radiator fluid runs into the engine and then the engine overheats.

Posted on Jun 29, 2009

ZJLimited
  • 17970 Answers

SOURCE: My car is leaking antifreeze onto the ground under

If your coolant light turn on sometimes, and you can check that your coolant level is low, definitly you have a leak.

I suggest check this artricle about how to detecting coolant leak

Hope this help (remember rated and comment this).

Posted on Mar 26, 2010

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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1987 dodge w150 power ram overheats.could this be air in the coolant lines? I parked the truck because it overheated while driving it.the temp Guage went over 220 -230 by the time I shut it off and kept...


If the unit overheated and there was no coolant flowing into the reserve tank, then there is two possible issues that must be addressed immediately. Either (1) There was not enough coolant in the system. This is because when the coolant heats up it expands and will go to the reserve tank. The fact that there was going to the tank indicates that the system is less than full, or (2) The radiator pressure cap is defective.

I would flush the cooling system, clean the reserve tank, replace the radiator cap, and refill the system and retest.

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I changed the thermostat in my 91 plymouth sundance and my car is still overheating and the reserve tank is spitting out coolant


You change the head gasket

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Water in reserve tank boiling from radiator


well the reserve thank usually holds excess water. basically when water gets hot it expands and increases in size, the expansion causes some of it to go into the reserve and it can be very hot even boiling..

did this happen before or is it strange ?
notice any other problems while driving around, noises, engine overheating ?
does the radiator fans turn on ??

Dec 30, 2012 | 1995 Toyota Corolla

2 Answers

Overheating coolant boiling out into reserve tank


you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...

Jul 14, 2012 | 1998 Plymouth Breeze

1 Answer

The car was overheating i checked all hoses and replaced the thermostat the radiator it still is ovrheating and the water is boiling in the overflow tank


Answer could be a faulty thermostat,or it could be a sign that your head gasket is about to blow ,or last of all your timing could be out of sync.

Answer 2 from Inventus: It means your cooling system is funtioning properly. In a system having a coolant recovery tank, coolant in the radiator is always up to the brim, hot or cold. There is negligible or no air space. When coolant in the radiator expands sufficiently due to warming from the engine, it will squeeze past the pressure cap's bottom seal and flow into the recovery tank. (If no provision for such expansion was present, the expansion would rupture the radiator or your hoses.) Only coolant within the radiator is under pressure, and because of this pressure (together with the elevated boiling point that the "anti-freeze" permits), it normally does not boil. But once past the pressure cap's bottom seal, the overflow is at atmospheric pressure and therefore boils.
This boiling is usually unnoticed after a short, i.e., local, trip because the cooler coolant already in the recovery tank quenches it. But after some highway driving the influx of more hot overflow heats up all the coolant in the recovery tank to the (unpressurized, i.e., "natural") boiling point.
As the engine cools when shut off, the contracting coolant in the radiator sucks back coolant from the recovery tank. Fluid in the recovery tank should never be below the "full hot" or "full cold" marks, lest air be sucked in.
-- BETTER ANSWER ==
Your cooling fans are not turning on. It is not normal for your overflow tank to boil like that. It is true that your radiator is overflowing into the reserve tank, but that means yourr adiaotor is boiling. Check for blown fuses or relays for your cooling fans. IF theya re fine. run your engine for about 15 minutes and drive. When you temp level is at normal operating temp open your hood with the engine runing and see if your fans are on. If they are, then you may have a bad thermostat or a plugged radiator, or a bad water pump. If the fans are not on, get your cooling fan switch replaced if your car has one. Check your temp sending sensor

Oct 30, 2011 | Cars & Trucks

1 Answer

My reserve coolant is boiling but its stay full ...why???


Might be mostly water. Check the gravity of the coolant, one of those little floaty ball things at walmart, $2, If it is not up to par with 50/50 coolant, fill it up or drain some of the water out. It is building up too much pressure and releasing the boiling stuff into the reserve tank, the cap could be bad, not tight, could be a blown head gasket, check this stuff out. Look for oil in the top of the radiator, steam out the exhaust, usually loses water though. Water boils at 220 and coolant 260 in a closed system, keep an eye on the temp gauge, do not let it over heat. It will be shot if it does. Hope this helps.

Jun 28, 2011 | Dodge Caravan Cars & Trucks

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I have a 99 Mercury Sable Wagon that keeps boiling the radiator fluid out of the reserve tank. The temp gauge isn't reading hot, though. Any suggestions? Thanks.


Sounds to me like a blown head gasket. Even if your vehicle is not warmed up, if your reserve tank is boiling fluid out of it when the engine is cool, it's most likely losing compression from it all going to your reserve tank. And thats why it's fluids coming out of your reserve tank. BUT, if your radiator is clogged then the same thing could happen. So i would start out cheap before you have to replace a HG. Thanks, James Booth been a mechanic for 6 years

May 17, 2011 | 1999 Ford Taurus

2 Answers

1990 overheating in traffic reserve tank boils over


this is a sign the engine electric coooling fan is not working.

May 29, 2009 | 1990 Oldsmobile Cutlass Ciera

2 Answers

Overheating,reserve coolant tank boiling I have a 2000 Ford Taurus with the similar problem. I had my water pump replaced then this started.


Ford 2000 Taurus

To solve the problem you have the things to do in this order;

) When the engine is cold top off the radiator with fluid. (When the pump was replaced the fluid should have been also)
) Make sure the radiator fluid has anti-freeze in it. This is also anti boil also !
) Add fluid to the overflow reservoir.
) Make sure the drive belt was replaced on the water pump.
) With the engine running, you can add fluid to the radiator for the first minute or so. You want to get air pockets out.
) Replace radiator cap.
) Let car warm up. When it's hot you should get the radiator fan coming on.
) When it get hotter the air-conditioning fan may come on.
) If the fan does not come on, the heat sensor is probably bad.
) If all fans come on, and it overheats, you may have a bad thermostat. Trace the upper radiator hose to where it connects to the engine. That's where it located.

Do not operate the engine when it overheats, You will damage the head gaskets and cause radiator fluid to leak into the cylinders.
If you smell radiator fluid in the exhaust fumes, it may already be leaking.

May 07, 2009 | 2000 Ford Taurus

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