Question about 2001 Chrysler 300M

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I have a Chrysler 300 3.5L V6. Coolant boils and burns but engine temp does not get too hot until well after coolant begins boiling. Has new water pump and thermostat. Dyed the coolant to check for head gasket and that's good. No problem with the oil. Any suggestions?

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Water boils at 200* plus, you might want to check the cooling fans which involves the temp sensor, check into that

Posted on Aug 28, 2010

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The gauge on my suv marks it was overheating , we measured coolant and measures 240. mecanic replaced headgasket and suv had same symptoms, until the coolant temperature sensor was replaced.

Water boils at 220 degrees. Liquid cooled engines keep the the temp between 175-195degrees. Need to avoid boil over. 240 is boil over. Blown head gasket are very frequent since ethanol added to gasoline. Why? Fuel absorb water now because of ethanol especially if it sit longer than a week or two in your gas tank. The result...blown head gasket from engine fighting against contaminants burning in the cylinder. Prevention: drive more & use a marine grade stabilizer such as Sea-Foam at every fill up. Now you know.

Sep 16, 2015 | 2003 Kia Sorento

1 Answer

I have a ford focus water bottle boils and temp gauge in car rises 2 hot but engine not boiling can u help

Check the radiator cap, they wear out. Make sure that the coolant is the right mixture, Check the water pump.

Jan 15, 2015 | Ford Focus Cars & Trucks

2 Answers


If the thermostat is not opening, the engine will keep getting hotter as you drive. You could be low on coolant and have air pockets in the system which would cause the temp gauge to not be accurate. Is the radiator fan coming on when the tank is boiling ?

Jul 29, 2013 | 2001 Chrysler Concorde

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.
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

2 Answers

Orginally, the temp gauge reads normal, drives fine, shut car sown and the reserve tank is boiling, changed the thermostat last night, let the car heat up drove it 2 blocks away, temp gauge shot up to hot...

2 blocks is fast to reach boiling.Take the cap off the overflow tank and fill it right to the very top with coolant.Start the car and watch for a steady stream of bubbles.If you see a steady stream you do need a head gasket or have a crack somewhere in a combustion camber.

Jul 03, 2017 | 2001 Chrysler 300M

1 Answer

Car keeps boiling tru resivour at side. all coolant boiled outta it found out it was a broken radiator cap. got new cap what coolant do i put back in and how much

Get the green stuff and mix it 50/50 with clean water. With the vehicle cool fill up the radiator until it is full and then fill the overflow tank up to the cold fill level. Start the car and take it for a spin making sure to get it up to operating temp, let it cool and then see where your level is on the overflo tank. Fill up to the hot mark and then repeat a couple times and you should be good.

Aug 01, 2011 | 1993 Toyota Camry V6

1 Answer

We changed the radiator and hoses and the thermostat and the cap to the radiator and the water pump it is still over heating what else could be wrong with it please help already spent to much money on it...

heres a couple of cheap ideas If after changing coolant or any time you have worked on the system, you must bleed all air out of the cooling system. Trapped air can cause an air pocket which will cause a hot spot and overheating. Some cars have bleeder screws and some don't. Check your owner's manual. If there is no bleeder valves and you suspect trapped air, park the car uphill or jack up the front, start the engine with the radiator cap removed and run until it reaches operating temp.

Common cause for this is too much water, not enough antifreeze. Evaporation is called "boil over". Adding antifreeze to water increases its boiling point. Since water boils at 212 degrees, and (my car) optimal operating temperature is 190 degrees - there is a thin line from running normal to "boiling over". Solution - the mix in the radiator should be 50% antifreeze and 50% water. To get the correct ratio antifreeze to water, buy a coolant test kit or buy your coolant in pre-mixed bottle.

also,, are you sure the fans are operating correctly !!

Jul 10, 2011 | 1996 Chrysler LHS

2 Answers

The engine is runing hot and the water is boiling

replace coolant fluids and oil and add more water

Oct 29, 2009 | 2002 Chrysler PT Cruiser

2 Answers

Engine runs hot on 2001 Stratus R/T 3.0L V6

Hello, as previously suggested by my collegue it appears you have an air lock. Have you tried parking the vehicle on level ground, from cold with radiator cap off start the car and leave it idling. Make sure the fluid/coolant levels are o.k. and let the engine reach operating temp. Keep some warm water handy and watch/listen the water/coolant system (Keep a safe/sensible distance from radiator) hopefully after a while the system will bubble and boil up let it settle for a few seconds and then top up with very warm water do this until it hopefully stops belching out of radiator. Replace cap and hopefully top and bottom hoses will be warm. Oh! nearly forgot keep all heater controls on hot with blower on full..(Inside the vehicle)
Finally I'm not joshing but is the thermostat in the right way round and functioning correctly? to test drop it in some boiling water it should open almost immeadiatly.
sorry for the epic but I'm here to help and hopefully save you time and money.
Good luck and a Happy New Year to you and your family!
Paul 'W'

Dec 29, 2008 | 2002 Dodge Stratus

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