How do i change my heater core?step by step guide?

STEP 1. and STEP 2. remove your engine cover STEP 3. disconnect battery (8mm socket) and i removed strut tower brace just to have more working space (four 13mm nuts, 2 on each side) STEP 4. Remove coolant reservoir (two 10mm nuts on top, also disconnect hose and cap it off if necessary) STEP 5. loosen and remove serpentine belt by loosening tensioner pulley (15mm deep socket) TEP 6. Remove your alternator and bracket (three 15mm bolts on alternator) the bracket is held on by a 15mm nut on one end and a 10mm bolt on the other end, disconnect harness and remove positive cable (10mm nut) STEP 7. Disconnect heater hoses, inlet and outlet, (using pump pliers to compress clamps) cap off if necessary and set aside STEP 8. remove the belt tensioner assembly (three 15mm bolts, one is hidden on the bottom left side) Also this is a good time to check your power steering fluid

Hi Rick,here's a link to replacing your heater core,I am doing mine right now on my 85 Nissan 720 truck. Repair Guides Heating Air Conditioning System Components Heater Core...

Here's a link on how to replace your heater core howard. Repair Guides Heater Heater Core AutoZone com

Here's a link to replacing your heater core,it's a job,be sure to replace your seals that the boxes connect to each other or air will go thru,your's is probably dry rotted.Also make sure your outlets are pointing in the same direction on both heater cores,if they are different,then your heater hoses going to them will be too short,happen to me. Use a 2x4 to hold dash up,I did.Repair Guides Heater Air Conditioning Heater Core AutoZone com

For heater core replacing procedure. I suggest you to go through this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models?

Click the link below: ---

http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html

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How to Flush Heater Core?

http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html

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How to Remove Heater Core ?

http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.html
Heater Core Replacement?

http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html

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To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------

How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.html
How to replace heater core on car models?

http://howtobyme.blogspot.in/2012/02/how-to-replace-heater-core-on-buick.html
----------This will help.Thanks.

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.

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.

HI. This is not an easy job but, im sure you will be able to accomplish this with a little guidance. I have put together a guide for you to follow. Its a step by step guide and, it will help you with this replacement of your heater core.


REMOVING THE OLD CORE--

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Step 1

Jack up the car and drain the Impala's cooling system. Loosen the water pump's drain bolt and let the coolant drain into a pan. Close the drain bolt and lower the car afterward.
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Step 2

Remove the heater outlet and inlet hose from the heater core (reposition the hose clamps to do so). Take off the right console extension panel, body control module and left side extension panel on the front floor console
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Step 3

Disconnect the left instrument center support bracket (pull away the carpet at its bottom to reach the nuts). Remove the accelerator control pedal from its position in the front of the dash.
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Step 4

Disengage the center floor ducts by raising the outlet duct while pushing the ducts down. Rotate the outlet duct forward in the car and pull down to remove it from the HVAC module.
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Step 5

Use a small chisel to remove all the heat stakes from the heater core cover. Loosen the nut behind the fuel line bracket. Remove the dash panel's stud at the heater hoses.
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Step 6

Pull the core's cover down enough to reach the HVAC module's locating pins. Slide the cover rearward until the drain tube clears the dash front. Remove the cover by sliding it down, rearward, and to the right. You can now remove the core.
Installing the New Core


INSTALLING THE NEW CORE---

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Step 1

Install the new core into the HVAC module, attaching a new seal onto the drain tube. Attach the core cover from the right side, sliding it up and forward into position.
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Step 2

Align the drain tube with the front dash hole and the core cover holes with the HVAC locating pins. Install the core cover screws, cutting and folding back the sound insulator near the center screw to ease that screw's installation.
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Step 3

Reinstall the dash panel stud at the heater hoses, tightening the nut behind the fuel line bracket. Align the center floor duct with the HVAC and push it up while rotating rearward to install it. Put the floor ducts and outlet duct back into the Chevy Impala.
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Step 4

Attach the accelerator control pedal. Pull the carpet back and position the left center support bracket, then tighten the bracket nuts.
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Step 5

Reconnect the left side front floor console extension panel and the body control module to the car.
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Step 6

Put on the outlet hose and inlet hoses to the core, securing them with their clamps. Refill the cooling system with the proper mixture of water and coolant.


Inspect the foam seal for the core on the lower HVAC case. Replace it with adhesive black foam tape if damaged.

Please rate and have a good day:)

First what kind of motor do you have 2.5l, 3.1L?

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

There is so many steps required in this procedure. I would recommend purchasing a repair manual so that you have it on hand.

Replacing the heatercore on a wrangler is not easy. The dash has to be pulled foward,cables have to be disconnected,heater hoses disconnected,heater housing dropped and disassembled. I suggest for you to buy a repair manual and it will guide through all the steps to perform this task.