Question about 2002 Dodge Stratus

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I have coolant leaking from the heater core inlet tube; how easy is that to fix myself and is there a temporary fix I can try if I have to have a pro do it?

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Get ready to pull the dash out to replace the core, it ain't easy and paying someone who has done it before is the only practical fix. The easy fix is to pull both hoses off and put a short piece of pipe between them to remove the core from the system. Note that your defroster and heater will be no good.

Posted on Nov 15, 2010

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A heater core is nothing more than a small radiator with coolant passing through it. Like a radiator, heat in the coolant is dispersed to the surrounding air -inside the heater case. If it isn't leaking coolant, you will only have to fix it when you can't stand being without a heater. Would it help not using it? Only if using it causes it to leak.
What exactly is broken? If it is losing coolant, a temporary remedy is to splice the two heater hoses together. You can pull them off at the firewall, the inlet and outlet hoses, buy a plastic coupling piece that fits snugly into the hoses, and clamp them tight with hose clamps. You will have no heater, but you won't have a core that is leaking coolant into the heater case.
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How to remove and replace heater core on a 2000 mercury marquis


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Have 2004 jeep ckerokee and ac smells like antifreeze. there is water coming out of drain hose and out of bottom of the heater core cover onto floor. do you thing this is a heater core problem.


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Bad heater core you will need to replace it. About a 2 hour job, very easy to do:


Remove the HVAC module assembly. Refer to HVAC Module Assembly Replacement.
Remove the HVAC filter cover.
Remove the heater core/evaporator tube seals from the module.
Remove the heater core cover screws (1).
Remove the heater core retaining screws (1).
Remove the heater core retaining straps.
Remove the heater core.
Remove the rubber seals from the inlet/outlet pipes of the heater core.

Installation Procedure

Install rubber seals to the outlet/inlet pipes of the heater core.
Install the heater core to the module.
Install the heater core retaining straps.



Install the heater core retaining screws (1).
Install the heater core cover.



Install the heater core cover screws (1).



Install the heater core/evaporator tube seal from the module.
Install the HVAC filter cover.
Install the HVAC module assembly. Refer to HVAC Module Assembly Replacement.

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It sounds like you probably have a leak in your heater core. Replacing a heater core can be a difficult job. If you decide want to try it I suggest you get a shop manual to help you out. I can give you a relatively easy temporary fix that will stop the leak until you have more time to fix it or you can take it into a shop to have it done. The down side is this fix will temporally disable your heater. Wait for the engine to cool. Open the engine compartment and look all the way in the back between the engine and the firewall. Find the 2 heater hoses that pass through the firewall. They should be about 1 inch in diameter. Undo the hose clamps and disconnect them from the firewall. Get a short piece of metal tubing about the thickness of the inner diameter of the hoses. Use this metal tubing to connect the heater hoses together and clamp them using the two hose clamps. Now the antifreeze that would normally circulate through your heater core will instead circulate through this loop and not enter the passenger compartment. If you can't find a short piece of metal tubing to do this fix you can completely remove one of the heater hoses. Then take the other heater hose and connect it to location near the engine where you disconnected the first hose. Save the first hose so you can hook it up later when you do the more permanent fix. Make sure to position all hoses such that they aren't resting on any hot surfaces. I hope this advice helps you out.

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Heater not workin, sprinter 311


Check the coolant level for over heating issue.If the coolant is low then car will overheat.Also if coolant is getting leaked then also due to that car overheats.Also if there is blockage of coolant in heater core tube then it can be one more reason.Disconnect the inlet and outlet hoses on the firewall that go to the heater core, and flush the heater core out thoroughly with a garden hose.The heater not working,for this check the heater blower motor ,If the motor is faulty then heater will not start.Other cause of heater not getting started is faulty thermostat and faulty coolant temperature sensor.This are the possibilities that are to be checked.Thanks.

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How to remove heater core from buick cintury 1995


With Air Conditioning
CAUTION When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Disconnect the negative battery cable and drain the cooling system.
  2. Disconnect the heater hoses from the heater core inlet and outlet connections in the engine compartment.
  3. Allowing residual coolant from the heater core to drain. Cap the openings.
  4. Working inside the vehicle, remove the lower instrument panel sound insulator.
  5. Remove the heater floor outlet duct screws or clips and remove the duct.


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Remove the heater floor outlet duct screws or clips ...


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... then remove the heater floor outlet duct

6. Remove the heater core cover by removing the attaching screws and clips.

7. Remove the heater core cover.

8. Remove the heater core retainers and remove the heater core.


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Remove the mounting bolts which retain the heater core

To install:
  1. Position the heater core in the housing and install the retaining straps.
  2. Position the heater core cover on the housing and install the attaching screws and clips.
  3. Install the floor outlet duct and attaching screws or clips.

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Exploded view of the heater core and case assembly

  1. Install the lower instrument panel sound insulator.
  2. Working in the engine compartment, connect the heater core inlet and outlet hoses.
  3. Fill the cooling system.
  4. Start the engine and check for coolant leaks. Allow the engine to warm up sufficiently to confirm the proper operation of the heater.
  5. Recheck for leaks. Check the cooling system level.
  1. Drain the cooling system.

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Heater and air conditioning module assembly

CAUTION When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.


  1. If equipped with a diesel engine, raise and support the car on jackstands.
  2. Disconnect the hoses at the core.
  3. On diesels, remove the instrument panel lower sound absorber.
    1. Remove the heater duct and lower side covers.
    2. Remove the lower heater outlet.
    3. Remove the two housing cover-to-air valve housing clips.
    4. Remove the housing cover.
    5. Remove the core restraining straps.
    6. Remove the core tubing retainers and lift out the core.
  4. To install:
    1. Install the core, then attach the core tubing retainers.
    2. Attach the core restraining straps.
    3. Install the housing cover, then install the two housing cover-to-air valve housing clips.
    4. Install the lower heater outlet, then attach the heater duct and lower side covers.
    5. On diesels, install the lower instrument panel sound absorber.
    6. Connect the hoses at the core.
    7. Lower the vehicle if raised and supported.
    8. Fill the cooling system.
    9. Start the engine and check for coolant leaks. Allow the engine to warm up sufficiently to confirm the proper operation of the heater.
    10. Recheck for leaks. Check the cooling system level.

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