Question about 1999 Plymouth Grand Voyager

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Water comming out of center console on dashboard. Bypassed heater core but still have water comming out of same area

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  • wessk1962 Sep 24, 2009

    Below the dashboard there is a center console with the ash tray and power plug. I noticed one day while the van was running water running into the driver's side floor from just behind this console down the transmission tunnel. I went under the hood and spliced the two heater hoses together thinking it was the heater core leaking. There is still water running as previously described. I thought at first that it may be residual water leaking out of the heater core. Now I am not so sure. Could it be the AC drain hose stopped up and leaking? If not what else could it be?

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Can you be more specific ?

Posted on Sep 24, 2009

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My Wife's care overheats and the heater only blows out cold air.


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the throwing back of the coolant is the boiling of the coolant in the block ( bad head gasket) due to lack of circulation. It may be a blocked radiator as flushing doesn't fix the blocked cores . If that is the case a new radiator is in order.

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Need diagram for replacing heater core



    Detach the heater core hoses at the firewall. The two black hoses attach near the firewall on the passenger's side of the engine compartment. Squeeze the hose clamps on the end of the hoses with pliers and slide the hoses from the heater core tubes.

    • 4Remove the lower passenger's-side and driver's-side dashboard panels. The two panels are held in with push-pins. Raise the center of the push-pins with a small, standard screwdriver and pull the pins from the panels. Pull the panels away from the dashboard to separate them from the dashboard.
    • 5Remove the center console. Separate the gear select trim piece from the center console, using a small standard screwdriver to pry the trim piece from the center console. Lift it over the shift knob and rotate it to clear the knob. Remove the retaining screws holding the center console in place with a Phillips screwdriver. Lift the console up over the shift knob and remove it from the interior.
    • 6Remove the glove box. Open the door to the glove box. Squeeze the two retaining tabs on the ends of the glove box and pull the glove box away from the dashboard. Remove it from the interior.
    • 7Detach the drain tube from the heater core cover, which is located behind the glove box. The tube can be pulled from the heater core cover by hand. Detach the air intake duct from the bottom of the heater core cover. The air intake duct runs from the bottom of the cover to the center of the dashboard. Remove the duct by hand.
    • 8Remove the retaining screws on the black heater core cover with a Phillips screwdriver. Pull the cover from the heater core and remove it from the interior. Remove the heater core clamp screw with a Phillips screwdriver, pull the clamp away from the heater core, then pull the heater core from the housing.
    • 9Place the replacement heater core against the housing. Place the clamp over the heater core and install the clamp retaining screw with a Phillips screwdriver. Position the heater core cover over the heater core and install the retaining screws with a Phillips screwdriver.
    • 10Attach the drain tube and the air intake duct to the heater core cover.
    • 11Install the glove box. Squeeze the retaining tabs on the sides of the glove box and push it into position against the dashboard. Release the tabs when the glove box is in position.
    • 12Install the center console. Guide the console over the shift knob and install the retaining screws with a Phillips screwdriver. Slip the shift selector trim piece over the shift knob and push it into the center console.
    • 13Place the lower passenger's-side and driver's-side dashboard panel in position. Install the push-pins into the retaining holes, pushing the in center of the pin to engage the pins.
    • 14Fill the radiator with coolant. Most climates require a 50/50 mix of DEXCOOL coolant and water. 2.2L engines require 8.6 qts., 2.4L

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99 grand caravan ..carpet is soaking wet on passenger side and in to the rear on the passenger side. I bypassed the heater core on the drivers side but still continues to leak water and antifreeze. Is...


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If it is antifreeze, your heater core is leaking and will have to be bypassed until you can have it fixed. Bypassing requires removing the two coolant hoses that go into the firewall on the passengerside, and making these two hoses connect by use of a pipe and clamps.
If it is just water, either your drain tube for the ac is plugged, or you have a water leak when it rains, usually from the air vent into the heater box-requires dissembly to get to it, probably a piece of rubber molding that has come loose.

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1 Answer

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A couple of things to check because as you describe your symptoms you actually have 2 problems

1. No heat from vents.

Sounds like the heater water flow valve cable is kinked disconnected or the valve itself is stuck You will need to follow your heater core water supply lines to find the valve usually to the right of the center console in the ducting area / large plastic housing for heater and AC internal coils. If the valve works then there is a possibility that the heater core water supply lines have been bypassed on the engine side of the firewall with a coupling due to a leaking heater core. And l;astly the heater core could just be clogged. (quite rare!!)

As for the overheating engine after all of the work you have done.. Perform this simple test.

1. remove radiator cap
2. have someone else start the car
3. watch for water coming out of the open radiator cap area DURING start...
4. have person in the car rev engine gently 2 or 3 times. No need to exceed 2000 RPM. If water rapidly flows out of the radiator during engine revs.. you have some major engine issues.
If it passes all of these checks then the only thing left is improper hose connections on the engine side of the firewall and or a hydraulic water lock in the block that should clear itself by starting and stopping the engine many times with the radiator cap off.



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1 Answer

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actually, the only way to fix this delicate piece of machinery is to replace the whole heater core unit. its the safe and best way. here are some step by step instructions on how to remove the old one. i also included instructions for installation of the new core as well. a fix ya rating would be most appreciated.


Remove the Old Core Step1 Drain the cars engine coolant from the water pump (remove the surge tank cap and drain bolt). Disconnect the heater outlet and inlet hoses by removing the clamps. Step2 Disconnect the Body Control Module. With the battery disconnected, parking brake on and transmission in Neutral, detach the entire front console, pull back the carpet to the right of the left dashboard support bracket and remove all the BCM's connectors and retainers. Step3 Pull back the carpet below the left dashboard support bracket. Remove the gas pedal from the front of the dash, then remove the center floor outlet ducts. Disconnect the main center floor duct from the heater/air conditioner module. Step4 Remove the heater core cover, from the HVAC module, sliding it away from the module locating pins and rearwards until the drain tube clears the dash front. Remove the heater core from the cover. Install the New Core Step1 Install the new heater core and reconnect the core cover. Use a new drain tube seal on the drain tube. Spray the core seal and dashmat with soapy water to make installing easier. Step2 Reattach the center floor ducts and the gas pedal. Install the Body Control Module and the front console. Step3 Connect the outlet and inlet hoses to the heater, replace the surge tank cap, fill the cooling system and connect the negative battery cable. Step4 Operate the cars engine until it reaches normal operating temperature. Watch over the climate control operation and check for any leaks.

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