Question about 1991 Jeep Wrangler

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Take out heater core

Easy way to take out heater core

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Why do you need to pull it? Almost never easy. If it's a small leak try sealers like Bar's Leak first. Try getting the procedure from a Chilton or Motor's manual at the library. If the car has A/C that system may also need to be opened and recharged and on a '91 car with Freon 12 that is a Federal violation not to mention bad for the enviroment if it's not recycled correctly. Costly to recharge too.

Posted on Feb 05, 2010

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Have to discharge a/c sys, remove lower instrument panel, remove bolts under hood and inside, undo vac and electrical , labor time about 3 hrs not counting recharge a/c sys

Posted on Feb 05, 2010

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1 Answer

Need a diagram for replacing heater core on 1969 f-250 defrost heater


You have an easy one. Follow the heater hose to the firewall. Remove them. remove the bolts holding the core in place and pull out the core. Reinstall. Newer ones, you have to remove the entire dash.

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Can you fix a windshield wiper switch and heater core at the same time in a 98 s10?


There not related,so doing the heater core doesn't doesn't make the wiper switch easier.Click here to see.Here's the heater core.

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Replacing a heater core return hose to the engine in a 2007 4.6L ford f150


The whole heater core has to be replaced.An easy check is to bypass the heater core by connecting the in/out hoses to the heater core

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How do you replace the heater core in a 1984 GMC 3500 camper


You will probably need new heater hose...first check heater hoses that run from engine to the
heater core......Most hoses will tear at the end where they are connected to the core and at the engine...First mark where each hose goes then drain coolant from system and remove both hoses...Take old hose's to parts store and get new hose's and clamps...They should be dryrotted
by the year of vehicle....It is easy to bend or break new core so be very careful when installing new core....After removing old hose's from core under hood you will know the location of the core....
remove screws under passenger side dash to remove core from inside of dash...very simple very easy....It looks like a tiny radiator with an in and an out spout...dont forget to mark where hoses
connect before removal.......Be sure and refill with new coolant/clamps/hoses because of age of vehicle...Both heater hose's that connect to the core are connected at the firewall on the passenger side of the engine...The core fits into the firewall dash and is connected to an input and an output hose...THIS IS EASY FOR BEGINNERS BUT BE CAREFUL WITH NEW CORE NOT TO BEND !!

Jul 29, 2011 | 1984 GMC VanDura

4 Answers

Heater core leaking through floor vents.


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.

May 19, 2011 | Cadillac DeVille Cars & Trucks

1 Answer

I need a diagram of where the heater core is in the engine and the easiest way to replace the heater core.


Heater core replacement is delicate and it is very easy to damage hard to get parts, including the core itself. This job may be best for a shop to handle. The heater core is located in the heater box, follow the heater hoses from the engine to the passenger side firewall area...

Mar 02, 2011 | Geo Prizm Cars & Trucks

1 Answer

Easy way to put in heater core


There is no easy heater core install on your car. This is a delicate job, and it is easy to damage hard to get pieces of your heating system. This is one job best left to a qualified shop.
It is easy to damage the new heater core during installation.
Pressure test the system when finished.

Dec 31, 2010 | 1994 Buick Roadmaster

2 Answers

How to install a heater core on a 2005 dodge grand caravan


Very easy if you go through the lower part near the peddles

Dec 24, 2009 | 2005 Dodge Caravan

1 Answer

Have to replace the heater core on a 1997 Pot.


This is a fairly easy fix. Disconnect the heater hoses under the hood. Go to passenger side under the dash remove the lower panel from the dash to access the heater box. Unplug any and all connections on the lower half of the heater box and remove the lower half of the box should be about six screws you should see the heater core and the evaporator core. Heater core skinnier of the two should have one or two straps holding it in remove the straps and remove the core and replace.

Oct 05, 2009 | 1997 Pontiac Sunfire

2 Answers

Antifreeze leaking on firewall out of rubber elbow?


I had the same problem and it is the heater core. Hope the info below helps.

The heater core is inside the firewall under the center of the dash. It requires removing the center console to reach the plenum cover.

Drain the coolant. Be Prepared for a few skinned nuckels. First dissconnect your battery You will be working around wiring harness' so just tobe on the safe side I would disconnect the battery.The easy part is removing both glove boxes, remove the console remove the covers under the steering wheel remove the cover surrounding the the radio and heater controls, now remove the first plastic cover it will have two ports going into the center console, you might have pull back the carpet on both sides to get it out. After you remove that cover you have to remove the next cover that hides the heater core. When that is removed you should see the heater core there are four bolts two top two bottom holding silver bands remove these and the heater core will be loose. When removing everything make sure you get all the screws I missed two hidden screws and broke the cover. Some are torx some are nut heads.Now that is the easy part the hard part is removing the heater hoses from the back fo the engine. If the You are sure the heater core is shot usually coolant on the carpet is a good indicator just snap the two plastic pipes going to the heater core. This will make it easier to access the hoses. There is no easy way to remove these is is a matter of determination and patience. I would never change a heater core without changing the hosesyou will see that it will be worth new hoses because you will not want to repeat this procedure again.

Jul 21, 2008 | 1993 Pontiac Grand Am

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