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Old 09-29-2009, 11:42 PM
gblyleven gblyleven is offline
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Join Date: Sep 2009
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Default 98 Ranger Heater Core Questions

I have a 98 Ford Ranger 4wd xlt with the 3.0 L V6 and the heater core has given up the ghost. I'm thinking of taking on this project myself but I'm wondering just how bad it is. I've read the manual and it seems like a nightmare... More specifically, does the ac need discharged? The manual says nothing about it but it seems like people are saying it does.... Any help is appreciated and a specific walkthrough would be golden. Thanks
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Old 09-29-2009, 11:46 PM
Ranger_EDGE Ranger_EDGE is offline
Join Date: Sep 2009
Posts: 2,522

my dad has the same issue with his 86 ranger. i heard you have to take the lower part of the dash off then you can sopossely see it. im lost with you man :/
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Old 09-30-2009, 03:54 AM
STL STL is offline

Join Date: May 2009
Posts: 23,331

1. Disconnect the negative battery cable. Allow the engine to cool down. Drain the cooling system to a level below the heater core fittings on the firewall.

2. Disconnect the heater hoses from the heater core tubes and plug hoses.

3. Remove the five nuts that secure the blower motor housing to the firewall.

4. Pull the housing away from the firewall. Disconnect any wire harness plugs which inhibit the housing.

5. Remove the remaining nuts which secure the heater air plenum (inside the passenger compartment) to the firewall.

6. In the passenger compartment, remove the instrument panel. Refer to .

7. Pull the heater air plenum rearward from the firewall and remove it from the vehicle.

8. Remove the heater core from the heater air plenum.

9. Inspect all air seals on the components and firewall and replace any that are damaged.
2005 Edge

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