Question about 2001 Chrysler 300M

3 Answers

2001 300m overheating problem.

I have a 2001 300m. I have replaced the thermostate, waterpump and had it pressure tested. The car can sit and idle for 30 minutes without overheating. As soon as I drive about 30 miles on the freeway it starts to overheat. Any ideas?

Posted by on

  • 4 more comments 
  • jvalentine_h Jan 29, 2009

    I will check it when I get home tonight. There is no vissible evidence of an external leak when the car sits and iddles.

  • jvalentine_h Jan 29, 2009

    The shop it is at said that it is got good compression in the cylinders. He thinks that i might be a cracked head gasket?

  • jvalentine_h Feb 02, 2009

    I took it to a Chrysler Dealership and explained what was happening. They ran tests and said they don't know why it's overheating. They said they road tested it 30 miles and all it did was get to the notch over halfway. They gave it back to me to drive for a couple days and then let them know. We'll I drove it to work today and after 25 miles the guage went to 3/4 hot. A funny thing did happen though when I turned off the freeway it went down to 1/2?

  • Anonymous Mar 13, 2009

    i have a 2001 chrysler 300m, it smells like it is overheating but the temp. gauge is halfway. i keep filling overflow reservoir 3 times a week

  • btusltd May 03, 2009

    My 99 300M has had similar problems. From what you describe it sounds like you might have an air lock in your cooling system. I would recommend that you bleed any and all air out of the cooling system. The bleeder valve is located on top of the engine. Once engine starts to overheat or when you can hear bubbling back into the overflow bottle, turn car off and open bleeder valve. If you see bubbling you have air in your system. Bleed the system a couple of times and see if this helps.

  • Pamela2001 May 10, 2009

    I have the same problem, overheating, but I discovered that my electric fans next to the radiator aren't starting. What would cause that?

×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 3 Answers

My 99 300M has had similar problems. From what you describe it sounds like you might have an air lock in your cooling system. I would recommend that you bleed any and all air out of the cooling system. The bleeder valve is located on top of the engine. Once engine starts to overheat or when you can hear bubbling back into the overflow bottle, turn car off and open bleeder valve. If you see bubbling you have air in your system. Bleed the system a couple of times and see if this helps.

Posted on May 03, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 68 Answers

When the vehicle overheats, do u check the water/coolant level in the radiator? If it has reduced, it means ur leaking and u should inpsect to c where the leak is coming from. If the level has remained the same, probably ports are blocked or something to that effect. Keep me posted though

Posted on Jan 28, 2009

  • Romel Edmondson
    Romel Edmondson Jan 29, 2009

    That doesn't sound right at all, because if there is a cracked/blown head gasket, there is no way u can get good compression in the cylinders. With a cracked head gasket, the compression will be leaking. The gasket seals the compression in the cylinder

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Check to see if your electric fans are working in front of your radiator.

Posted on Feb 01, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Engine overheating


It is possible you have a leaky head gasket, allowing combustion gases into the water jacket. If this is bad, you will see white bubbles in the coolant, like dry ice, but not in every case.

There is a test for this condition you can have done

http://www.youtube.com/watch?v=94YgjImiLWE

Jan 08, 2014 | 1999 Mercury Cougar

1 Answer

97 chevy cavalier overheating ,new rad ,new waterpump, new thermostate . still overheats


check fan, and also have the system it pressure checked for any internal or external leaks.










TIM.....

Oct 23, 2010 | 1998 Chevrolet Cavalier

1 Answer

I have bought a 99 land rover discovery and it is overheating


From practical experiences of heavy trucks, this problem is created by poor coolant flow thro' the Radiator Core. Flush cleaning the Rad. or decontaminating the exterior air flowways will not cure the problem. My recommendation is a Recore or after market replacement.
Regards.DT

May 10, 2010 | 1999 Land Rover Discovery

2 Answers

NISSAN ALTIMA '05 NO HEAT AT IDLE HEAT WHEN MOVING


I'm having the same problem, no heat at idle. I replaced the waterpump/both thermostats/belt and radiator. I'm still having the same problem. any ideas?

Thanks,

Kurt

Jan 27, 2010 | 2005 Nissan Altima

2 Answers

My jeep grand cherokee started overheating at idle


try the water pump - first - make sure the radiator is really full - take the cap off cold and fill - if it looks full - start and run 8 minutes or so - then fill it up - look at ur fan belt - is it tight - tight is about how much pressure u use to make a firm hand shake with little movement - any movement over about an inch is loose - when the jeep warms up the belt can slip and not even make a noise - - new materials don't always squeal. - then be sure ur water pump is ok - they go slowing - the fins wear down - one more thing is the radiator - u don't say how many miles or what maintenance schedules you have or not so that's it for now

Dec 26, 2009 | 2006 Jeep Commander

3 Answers

1996 ford thuderbird is overheating and the resivor is


First place to look is the thermostat. When a thermostat fails, it prevents additional coolant from entering through the reservoir. Coolant backing up into the reservoir is another symptom of a bad thermostat. The reason you don't experience overheating when you drive is sufficient coolant is being pumped through the system by the waterpump.

Jul 22, 2009 | 1996 Ford Thunderbird LX

1 Answer

97 chrysler lhs overheats


Head gaskets don't cause overheating Usually they are a result of overheating. If the headgasket is bad one wil get leaking into the cylinders of coolant,which wil show up as milky oil.Like some one else stated ; have the radiator rodded out,(cleaned and fluashed).

May 09, 2009 | 1996 Chrysler LHS

1 Answer

2001 DTS Deville Overheating. Cant find leak. Checked waterpump and looks Ok. Only seen coolent at overflow when overheating. Cooling fans are running ok. Will try to find problem by starting by changing...


if you have a blown head gasket you would have a miss
the waterpump can look good and still be bad
after you replace the thermostate fill the radiator and leave the cap off start the car let it get too operating temp and check for flow if you have good flow shut the car off and and put a pressure terter on the raidator this will tell of and leaks

Feb 26, 2009 | 2000 Cadillac DeVille

1 Answer

1992 Honda Civic over heating replace theormostat - still overheating air bubbles in overflow jug and in radiator when running with cap off...


here is a check list for common overheating issues low coolant? Any leaks? A headgasket leak? To test that use a coolant mix tester. Do the cooling fans run with the engine hot? Is the rad cap holding pressure? This can be tested usually its easier to swap it with a working one or buy new. Lastly the waterpump and timing belt. If the timing belt if old/high mileage or the tensioner faulty it can cause overheating. The common practice is to replace the timing belt every 100,000miles along with the waterpump and the belt tensioner

Dec 28, 2008 | 1991 Honda Civic

Not finding what you are looking for?
2001 Chrysler 300M Logo

1,213 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chrysler Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

chargerhp
chargerhp

Level 3 Expert

813 Answers

Are you a Chrysler Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...