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Discuss TECH: 1997 Chrysler Concorde 3.5 Overheating Again in the rec.autos.makers.chrysler forum at Car Dealer Forums; I'm trying to figure out why my 1997 Chrysler Concorde keeps intermittently overheating. The car ...
  1. #1
    fredsmythson@yahoo.com
    Guest

    Default TECH: 1997 Chrysler Concorde 3.5 Overheating Again

    I'm trying to figure out why my 1997 Chrysler Concorde keeps
    intermittently overheating. The car has a 3.5 V6 and 125K miles. About
    10 months ago I was driving on the freeway and I noticed the heater was
    not working properly. The air would blow somewhat warm and then start
    blowing cold air, and then back to warm air. Suddenly, the heat gauge
    went to the "H" red line. I quickly drove off the freeway and stop in a
    parking lot to turn off the engine. I tried to add some water to the
    system, but the engine would still run hot. I had the car towed back to
    my home. The next day I added water/coolant to the cooling system -
    poured coolant directly into the engine block via the thermostat
    housing and added coolant to the system. I also replaced the
    thermostat. This seemed to work, because the car ran normally with no
    overheating problems for 9 months...

    About a month ago, the same thing happened. Same scenario - heater
    wasn't working properly, engine overheated and I drove the car back
    home a few miles. I waited about 15 minutes before starting the engine
    and driving the car back to my home. I said, "It must be a bad
    thermostat." Again, I filled up the engine block and cooling system
    with water/coolant, and replaced the thermostat with a "premium"
    thermostat. The car ran perfectly for a month.

    Today, the same thing happed yet again - heater wasn't working properly
    (changing from warm to cold and the heater would turn on and off by
    itself), engine overheated, and, in addition, a very noisy valve lifter
    chattered away while I was trying to exit the freeway to park the car
    in order to turn off the engine. Also, at this point, the car had lost
    about half of its engine power and stalled out when I parked the car.
    Yet again, I had the car towed back home...

    So, it seemed like the car was losing coolant at some point, but there
    were never any noticeable leaks anywhere. Also, during the overheating
    problems, I could hear a lot of water flushing and gurgling in the
    heater core area. As if there was not enough coolant in the system.
    Also, I could always smell a slight odor of coolant when I sat in the
    car over the last year. I never could smell coolant when I opened the
    hood.

    I looked under the car to see if anything was happening. I noticed that
    the tailpipe resonator was dripping water. There was a 3 inch wet spot
    where the resonator joined the tailpipe. So, maybe this is where the
    coolant was slowly disappearing to.

    Well, I was hoping it would not be a head gasket problem, but that
    looks like the issue. Or could it be some other component that I
    overlooked - radiator, water pump, hoses??? Many Thanks!


  2. #2
    cadauctions
    Guest

    Default Re: TECH: 1997 Chrysler Concorde 3.5 Overheating Again


    I hate to be the bearer of bad news but this is most likely the head
    gasket, or what I more lean toward is a cracked head. Dodge has had
    this problem for the last 15 years or so. What makes me think it is a
    crack is that the coolant is lasting less time each time this happens
    which would indicate to me that the crack is worsening each time it
    overheats. I had 5 Neons and all of them had head problems. Some were
    gaskets and some were cracked heads. I took care of them famously too.
    Didn't matter though they still ended up the same way. I hope I am
    wrong, but I would definatley examine the oil, and look for traces of
    coolant, and run the engine and look for cracks. Hope it works out for
    you.


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  3. #3
    damnnickname
    Guest

    Default Re: TECH: 1997 Chrysler Concorde 3.5 Overheating Again

    Water out of the tailpipe is normal, thats what the cat convertor does, If
    you are loosing coolant and that is what it sounds lie the problem is, and
    you dont see where it is going it could be the head gasket. BUT remove the
    radiator cap and make sure the sealing o-ring does not have any cracks,
    missing pieces of rubber and just make sure it seals. If the cap does not
    seal you could be loosing coolant this way. This is a common problem for
    this year vehicle.

    Glenn Beasley
    Chrysler Tech


  4. #4
    philthy
    Guest

    Default Re: TECH: 1997 Chrysler Concorde 3.5 Overheating Again

    a simple pressure test can tell wonders as to were a leak exists

    fredsmythson@yahoo.com wrote:

    > I'm trying to figure out why my 1997 Chrysler Concorde keeps
    > intermittently overheating. The car has a 3.5 V6 and 125K miles. About
    > 10 months ago I was driving on the freeway and I noticed the heater was
    > not working properly. The air would blow somewhat warm and then start
    > blowing cold air, and then back to warm air. Suddenly, the heat gauge
    > went to the "H" red line. I quickly drove off the freeway and stop in a
    > parking lot to turn off the engine. I tried to add some water to the
    > system, but the engine would still run hot. I had the car towed back to
    > my home. The next day I added water/coolant to the cooling system -
    > poured coolant directly into the engine block via the thermostat
    > housing and added coolant to the system. I also replaced the
    > thermostat. This seemed to work, because the car ran normally with no
    > overheating problems for 9 months...
    >
    > About a month ago, the same thing happened. Same scenario - heater
    > wasn't working properly, engine overheated and I drove the car back
    > home a few miles. I waited about 15 minutes before starting the engine
    > and driving the car back to my home. I said, "It must be a bad
    > thermostat." Again, I filled up the engine block and cooling system
    > with water/coolant, and replaced the thermostat with a "premium"
    > thermostat. The car ran perfectly for a month.
    >
    > Today, the same thing happed yet again - heater wasn't working properly
    > (changing from warm to cold and the heater would turn on and off by
    > itself), engine overheated, and, in addition, a very noisy valve lifter
    > chattered away while I was trying to exit the freeway to park the car
    > in order to turn off the engine. Also, at this point, the car had lost
    > about half of its engine power and stalled out when I parked the car.
    > Yet again, I had the car towed back home...
    >
    > So, it seemed like the car was losing coolant at some point, but there
    > were never any noticeable leaks anywhere. Also, during the overheating
    > problems, I could hear a lot of water flushing and gurgling in the
    > heater core area. As if there was not enough coolant in the system.
    > Also, I could always smell a slight odor of coolant when I sat in the
    > car over the last year. I never could smell coolant when I opened the
    > hood.
    >
    > I looked under the car to see if anything was happening. I noticed that
    > the tailpipe resonator was dripping water. There was a 3 inch wet spot
    > where the resonator joined the tailpipe. So, maybe this is where the
    > coolant was slowly disappearing to.
    >
    > Well, I was hoping it would not be a head gasket problem, but that
    > looks like the issue. Or could it be some other component that I
    > overlooked - radiator, water pump, hoses??? Many Thanks!



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