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Replace heater core in 1988 Ford Ranger

I need to replace the heater core in my 1988 Ford Ranger

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Allow the system to cool down

take radiator cap loose to release pressure

once pressure is released tighten cap

loosen clamps on the heater hoses in the engine compartment on the pass. side of firewall.

plug or cap off the heater core tubes to prevent spillage when you pull it into the truck

place a trash bag on floorboard in case spillage occurs

remove the five screws holding the heatre core access cover, three on top and two on bottom

carefully pull heater core back and down and remove it from the dash

install is reverse

Hope this helps

Posted on Mar 29, 2009

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Heater core


2.3l, 4 cyl.
If you need to replace the heater core it's really easy. Maybe 30 mins if you know what your doing. Remove the hoses (truck cold) from the heater core in the engine compartment (reclaim excess coolant that comes out). Remove screws from the passenger compartment fire wall area (inside), remove and reinstall heather core. Replace lost coolant. It's that simple.

on Jun 27, 2008 | 1988 Ford Ranger

1 Answer

How do you replace the heater core in a 1992 Ford Ranger STX V-6 4.0?


May be the easiest heater core i have ever replaced.Disconnect the two hoses going into firewall on the passenger side.Locate a small cover just underneath the glove box .Should be about 10 x 3 inches and have 8 screws i think.It is on the bottom of heater box.remove the screws and cover and pull out the heater core.You are now half way.reverse procedure and you are done.Good Luck!

Mar 05, 2011 | 1992 Ford Ranger

2 Answers

Innstaling the heater core


Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Nov 26, 2010 | 1988 Ford Ranger

1 Answer

Heater core removal 98 ford ranger


Disconnect heater hoses. Remove glove box. Remove cover over heater core,has a few 8mm screws. Replace heater core. Reassemble.Good luck.

Nov 04, 2009 | 1999 Ford Ranger SuperCab

1 Answer

Trying to put a heater core in a 1998 ford ranger and don't know how. Do you have a diagram to go by. step by step. thank you.


Disconnect heater hoses. Remove glove box. Remove cover fro heater core (8mm screws) . Remove parts in way of cover. Replace heater core. reassemble. I would recommend flushing system first. Top off coolant.

Oct 04, 2009 | 1998 Ford Ranger SuperCab

1 Answer

How to replace heater core on 1990 ford ranger


Remove the glove box door. Behind the glove box there will be a big plastic panel that contains the evaporator and the heater core. The heater core will be copper. That is the one you need to remove. Do not try to disconnect the aluminum one. That is for your AC. Remove the two heater hoses on the outside of the firewall that connect to the heater core and it will slide right out.

Mar 03, 2009 | 1990 Ford Ranger SuperCab

1 Answer

How hard or easy is it to change a heater core on an 1988 ford ranger


Check my tips and tricks in my profile. If you have a 88 ranger 4 cyl. like mine. It's a piece of cake. I can't imagine the 6 cyl version being that much more complicated but I haven't worked on one. If you have any mechanical skills and common screwdriver bits or small sockets it should take you all of 30 mins. And like everything else I ever had to replace on the truck it costs $25 - $35.

Sep 20, 2008 | 1988 Ford Ranger

2 Answers

Heater core replacement


It's one of the easiest cores to replace that I have encountered. Disconnect heater hoses at firewall. Probably doesn't matter about hose placement, but I always mark them just in case. To remove the fiber cover under dash, take a flat blade screwdriver and pry out the center pin of the expansion clips that hold it in place. There are four 5/16 head screws that hold the bottom/drain tray cover. Core will pull through the firewall and then down. You may have to silicone/glue or replace the foam seal strips on the new core. Before you install the core, check the distance between the inlet and outlet tubes to ensure they match the openings in the firewall. This saves time. It helps if you have someone on the outside to guide you when stabbing the tubes through the firewall. Replace bottom cover. You may have to hold one of the tubes when reinstalling the first hose to the core. Replace any lost coolant and check for leaks prior to reinstalling the fiber cover. If the cover seal is in good condition, any leak should drain through the firewall, otherwise it may leak inside cab. .

Sep 10, 2008 | 1999 Ford Ranger SuperCab

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