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Heater Cores and Blower Fans
Chevy G20
Oldsmobile Ninety-Eight
Ford Expedition XLT

Do you have to remove air conditioning unit to get to the heater core or can you get to it from underneath the vehicle?

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Answered 2006-08-20 04:21:34

have to change core thruogh plenum on inside of car so if AC evap is in way will have to be removed, PSTTTT If dont have to and take someones advice will cost more then the 20 bucks for a repair manuel, go buy one it pays

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Disconnect the negative battery cable.Discharge and recover the air conditioning system refrigerant.Disconnect the refrigerant lines from the evaporator. Plug the openings to prevent contamination.Disconnect the refrigerant lines from the accumulator. Plug the openings to prevent contamination.Remove the accumulator.Drain the cooling system into a clean container for reuse.Disconnect the heater hoses from the heater core tubes.Remove the PCM from the dash panel and move it aside. Do not disconnect the PCM harness connector.In the engine compartment, remove the heater/air conditioning housing assembly-to-chassis nuts.In the passenger-s compartment, remove the heater/air conditioning housing-to-dash panel nuts.Pull the heater/air conditioning housing assembly rearward far enough to clear the studs and air conditioning drain tube holes.Remove the heater/air conditioning housing assembly from the vehicle.Remove the upper-to-lower heater/air conditioning housing screws and remove the upper housing.Remove the heater core from the lower housing.


Discharge and recover the air conditioning system refrigerant.Disconnect the refrigerant lines from the evaporator. Plug the openings to prevent contamination.Disconnect the refrigerant lines from the accumulator. Plug the openings to prevent contamination.Remove the accumulator.Drain the cooling system into a clean container for reuse.Disconnect the heater hoses from the heater core tubes.Remove the PCM from the dash panel and move it aside. Do not disconnect the PCM harness connector.In the engine compartment, remove the heater/air conditioning housing assembly-to-chassis nuts.In the passenger-s compartment, remove the heater/air conditioning housing-to-dash panel nuts.Pull the heater/air conditioning housing assembly rearward far enough to clear the studs and air conditioning drain tube holes.Remove the heater/air conditioning housing assembly from the vehicle.Remove the upper-to-lower heater/air conditioning housing screws and remove the upper housing.Remove the evaportor core from the lower housing.


disconnect - battery cable drain cooling system. raise vehicle. working underneath remove drain tube from heater case. Loosen hose clamps and disconnect heater hoses from heater core tubes at firewall. Plug the ends of tubes to keep from spilling. Lower vehicle working inside vehicle remove left and right underdash panels. Remove heater floor outlet duct. Remove screws and clips that fasten heater core cover and remove cover. Remove retaining straps and heater core from housing. Careful not to spill coolant. Installation in reverse. Maybe you could help the person who asked the location of heater core for 92 sunbird. All in same general area.


below glove box remove heater/air conditioning cover then remove blower motor cover


1.If the vehicle is equipped with air conditioning,have the refrigerant discharged and recovered by a dealer service department or an automotive air conditioning shop 2.Disconnect the cable from the negative terminal of the battery 3.Set the heater control to 'HOT' and then drain the cooling system 4.Working on the engine compartment side of the firewall ,mark the heater hoses to ensure correct installation loosen the hose clamps and then disconnect the heater hoses from the heater core tubes.Plug the hoses to prevent dirt from entering the cooling system.Youll also see a vacuum line connected to a vacuum pipe at the firewall,right below the larger of the two heater hoses.Disconnect this line and plug it to prevent dirt and moisture from entering the line. 5.If the vehicle is equipped with air conditioning,disconnect the refrigerant lines from the evaporator connection tubes plug them too. 6.Remove the air conditioning and heater control assembly and the radio.Remove the instrument panel assembly 7.Disconnect the vacuum line from the door motor in the front of the blower assembly.Note the routing of this line between the door motor and the heater unit.When reassembling the under-dash heater and air conditioning it must be routed exactly the same way 8.If the vehicle is equipped with air conditioning remove the evapoator assembly 9.If the vehicle is equipped with cruise control,Electronic time and alarm control(ETAC)and/or keyless entry systems unplug the electrical connectors from the cruise control module,the ETAC module and/or the keyless entry module 10.Remove the bolts that attach the cruise control and the ETAC/keyless entry module brackets to the left vertical member of the center fascia panel support bracket 11.Remove the screws that attach the air conditioning and heater control assembly bracket to the heater control assembly bracket to the left vertical member of the center fascia panel support bracket 12.Remove the bolts that attach the right vertical member of the center fascia panel support bracket to the vehicle and then remove the right vertical member and the three horizontal support brackets as a single assembly 13.Peel back the carperting on the right side and then remove the bolts that attach the crossbar support bar to the vehicle and then remove the support bar 14.Peel back the crapeting on the left side.Detach the rear floor vent ducts from the rear floor vents and from the heater assembly and then pull each duct to the rear and remove it.(just pull out the ductrs through the surrounding foam-its not necessary to remove the foam). 15.Remove the mounting nut and bolt from the right side of the heater unit and remove the mounting nut from the upper left side 16.Remove the heater assembly from the vehicle 17.Disconnect the plastic vacuum hose from the metal vacuum line on the left side of the heater case 18.Disengage the heater core cover retaining clips from the heater case and then remove the heater core cover 19.Pull the heater core out of the case


# Disconnect the negative battery cable. # Drain the engine coolant. # Remove the instrument panel/dash assembly from the vehicle. # Remove the heater hose(s) and cap the hose(s). # Remove the attaching nuts and remove the heater unit assembly. # Remove the heater core attaching screw and remove the heater core..............


Lift up the vehicle and support it with jack stands and remove the two heater hose near the firewall. The heater core is in the center inside the vehicle and once you have removed the left and right covers you then need to remove the lower panel that the heater core is in and remember to pull the core back straight..........



No................... Its located in the center of the vehicle but you will need to remove the side panels if equipped and then remove the lower heater core cover and the heater hoses.............


Raise the froth of your car. Drain the radiator. Remove the heater tube from firewall and loosen the hose clamps. Lower the vehicle after draining the antifreeze. Locate the heater core and remove the mounting clamps. Remove the heater core and replace it.


To remove the spare tire on a Mercury Mariner insert the jack handle into the hole provided on the rear bumper of the vehicle. Turn the jack handle clockwise to lower the spare from underneath the vehicle.


The air conditioning will turn on with certain heater settings, typically any setting that mixes with the defroster. This to help remove moisture and improve the effectiveness of the defroster.


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


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


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remove radiator cap......back vehicle up......pull new vehicle underneath :)


# Disconnect the negative battery cable and drain the cooling system. # Disconnect the heater hoses from the heater core inlet and outlet connections in the engine compartment. # Allowing residual coolant from the heater core to drain. Cap the openings. # Working inside the vehicle, remove the lower instrument panel sound insulator. # Remove the heater floor outlet duct screws or clips and remove the duct. # Remove the heater core cover by removing the attaching screws and clips. # Remove the heater core cover. # Remove the heater core retainers and remove the heater core.


CAUTION: Some models are equipped with anti-theft-radio make sure you have the activation code before disconnecting battery * If the car is equipped with A/C has the system discharged first * Disconnect the negative battery cable * Set the heater control to hot and then drain the cooling system * Working from the engine compartment side of the firewall mark the heater hoses to ensure correct installation loosen the hose clamps and then disconnect the heater hoses from the heater core tubes.Plug the hoses to prevent dirt from entering the cooling system.You'll see a vacuum line connected to a vacuum pipe at the firewall right below the larger of the two heater hoses.Disconnect this line and plug it * If the vehicle is equipped with A/C disconnect the refrigerant lines from the evaporator connection tubes.Plug these lines to prevent dirt to entering A/C system * Remove the air conditioning and heater control assembly and the radio.Remove the instrument panel assembly * Disconnect the vacuum line from the door motor in front of the blower assembly. Note the routing of this line between the door motor and the heater unit. * If the vehicle is equipped with air conditioning remove the evaporator assembly * If the vehicle is equipped with cruise control,electronic time and alarm control (ETAC) and/or keyless entry system unplug the electrical connectors from the cruise control module,the ETAC module and/or the keyless entry module * Remove the bolts that attach the cruise control and the ETAC/keyless entry module brackets to the left vertical member of the center fasica panel support bracket * Remove the screws that attach the air conditioning and heater control assembly bracket to the left vertical member of the center fasica panel support bracket * Remove the bolts that attach the right vertical member of the center fascia panel support bracket to the vehicle and then remove the right vertical member and the three horizontal support brackets as a single assembly * Peel back the carpeting on the right side and then remove the bolts that attach the crossbar support bar to the vehicle and then remove the support bar * Peel back the carpeting on the left side.Detach the rear floor vent ducts from the rear floor vents and from the heater assembly and then pull each duct to the rear and remove it. * Remove the mounting nut and bolt from the right side of the heater unit and remove the mounting nut from the upper left side * Remove the heater assembly from the vehicle * Disconnect the vacuum hose from the metal vacuum line on the left side of the heater case * Disengage the heater core cover retaining clips from the heater case and then remove the heater core cover * Pull the heater core out of the case


CAUTION: Some models are equipped with anti-theft-radio make sure you have the activation code before disconnecting battery * If the car is equipped with A/C has the system discharged first * Disconnect the negative battery cable * Set the heater control to hot and then drain the cooling system * Working from the engine compartment side of the firewall mark the heater hoses to ensure correct installation loosen the hose clamps and then disconnect the heater hoses from the heater core tubes.Plug the hoses to prevent dirt from entering the cooling system.You'll see a vacuum line connected to a vacuum pipe at the firewall right below the larger of the two heater hoses.Disconnect this line and plug it * If the vehicle is equipped with A/C disconnect the refrigerant lines from the evaporator connection tubes.Plug these lines to prevent dirt to entering A/C system * Remove the air conditioning and heater control assembly and the radio.Remove the instrument panel assembly * Disconnect the vacuum line from the door motor in front of the blower assembly. Note the routing of this line between the door motor and the heater unit. * If the vehicle is equipped with air conditioning remove the evaporator assembly * If the vehicle is equipped with cruise control,electronic time and alarm control (ETAC) and/or keyless entry system unplug the electrical connectors from the cruise control module,the ETAC module and/or the keyless entry module * Remove the bolts that attach the cruise control and the ETAC/keyless entry module brackets to the left vertical member of the center fasica panel support bracket * Remove the screws that attach the air conditioning and heater control assembly bracket to the left vertical member of the center fasica panel support bracket * Remove the bolts that attach the right vertical member of the center fascia panel support bracket to the vehicle and then remove the right vertical member and the three horizontal support brackets as a single assembly * Peel back the carpeting on the right side and then remove the bolts that attach the crossbar support bar to the vehicle and then remove the support bar * Peel back the carpeting on the left side.Detach the rear floor vent ducts from the rear floor vents and from the heater assembly and then pull each duct to the rear and remove it. * Remove the mounting nut and bolt from the right side of the heater unit and remove the mounting nut from the upper left side * Remove the heater assembly from the vehicle * Disconnect the vacuum hose from the metal vacuum line on the left side of the heater case * Disengage the heater core cover retaining clips from the heater case and then remove the heater core cover * Pull the heater core out of the case


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only way to change lower radiator hose is to get underneath the vehicle there is a fawcet on bottom of radiator to dump coolant, then remove hose from underneath vehicle


The heater core is located under the hood inside the big box mounted to the firewall on the passenger side. 1)Remove the access panels or the split heater/air conditioning case to gain 2)access to the heater core. 3)Remove the heater coolant hoses. 4)Remove the cable and/or vacuum control lines (if equipped). 5)Remove the heater core securing brackets and/or clamps. 6)Lift the core from the case. Do not use force. Take care not to damage the fins of 7)the heater core when removing. 8)To reinstall the heater core, reverse the removal steps.


Disconnect the negative battery cable.Drain and recycle the engine coolant.Raise and safely support the front of the vehicle.If necessary, remove the rear lateral transaxle strut mount.Detach the drain tube, then disconnect the heater hoses from the core tubes.Carefully lower the vehicle.Remove the console if equipped.Unfasten and remove the sound insulators, console extensions and/or steering column filler, as required.On some models it may be necessary to remove the steering column opening filler.Remove the floor or console outlet ductwork and hoses.Remove the heater core access cover. Unfasten the heater core mounting clamps/bolts, then extract the heater core from the vehicle.


Disconnect the negative battery cable.Drain and recycle the engine coolant.Raise and safely support the front of the vehicle.If necessary, remove the rear lateral transaxle strut mount.Detach the drain tube, then disconnect the heater hoses from the core tubes.Carefully lower the vehicle.Remove the console if equipped.Unfasten and remove the sound insulators, console extensions and/or steering column filler, as required.On some models it may be necessary to remove the steering column opening filler.Remove the floor or console outlet ductwork and hoses.Remove the heater core access cover. Unfasten the heater core mounting clamps/bolts, then extract the heater core from the vehicle.


Disconnect the negative battery cable.Drain and recycle the engine coolant.Raise and safely support the front of the vehicle.If necessary, remove the rear lateral transaxle strut mount.Detach the drain tube, then disconnect the heater hoses from the core tubes.Carefully lower the vehicle.Remove the console if equipped.Unfasten and remove the sound insulators, console extensions and/or steering column filler, as required.On some models it may be necessary to remove the steering column opening filler.Remove the floor or console outlet ductwork and hoses.Remove the heater core access cover.Unfasten the heater core mounting clamps/bolts, then extract the heater core from the vehicle.



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