Heater Core

Hello,

Its not to bad but you will need to vacuum down and recharge the system here is a guide for that and the instructions on how to replace the core in the diagrams below.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

this guide will walk you through the steps with your car instructions below.

https://www.2carpros.com/articles/replace-heater-core

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

I'm trying to replace the heater core on my 03 dodge neon, and have reached a point of confusion. I have the haynes repair manuel and it has been great so far untill you get to chapter 11 and begin removing the instrument panel. CH 11, section 23, steps 12-15 do not have illustrations or references to previous section/chapters so I have no idea where these parts are that I need to take off. I need to "disconnect the data link connector", "remove the instrument panel support mounting bolts", "remove the A-pillar-to-instrument panel mounting bolts(two on each side), and disconnect the antenna right side connector". If anyone has diagrams/pictures of those steps it would be much appreciated. I'm in the navy and really need to get my car functional soon.

The data link is under the dash on the left side of the brake (it is a plug where a scanner plugs in). The the mounting bolts for the inst panel, is nothing more than a support bar that attaches from the inst panel to the sheet metal for support. The A-pillar is where the dash bolts to the sides of the interior. The antanna can be disconnected at the stereo rear.

Two leaks. When reservoir is service water leaks inside car when engine is running and heater on. Out side in engine compartment rubber approximately 3 inches in length and not connected to anything on firewall will leak when engine is turn off. Radiator will then be serviced with almost a half gallon of water after when rubber hose stop leaking. Radiator cap appears on. 2nd turn when cap installed and aligned with hose does not require much effort when reinstalling. Don't have the money at this time to replace the heater core, what can I do now. for a later date on a repair?

Hello - sounds like you know the problem.....the heater core is bad and will continue to leak. The one pick, is this the hose you are talking about? This is the drain for the HVAC. Normally the condensation from the AC drips from here. So the floor board is wet due to the heater core leaking and it also draining out of the hose and the HVAC is filling with antifreeze. The other pic shows you the inside of a HVAC and the drain hole. This hole is a tube and the rubber hose you see inside the engine compartment is connected to this.

Remove the two heater hoses from the heater core and connect them together.

That hose that isn't connected to anything is the drain hose for the water that condenses from the humidity in the air when the air conditioning cools it. Coolant leaking from the heater core drips into the same drain pan.

Thank you both on the info. It was very helpful I will get it repaired as soon as I can gather the money for repair and undo the hoses temporary connected. Thanks again.

Hey please don't forget since it is getting into the cold months.....you won't have any heat to the windshield for defrost. Good luck

Most definitely and will get it taken care of soon as possible. Thank You

I had the same problem and the fix by the mechanic was to put a silicone based sealant at the point of contact for the drain pipe with the body. Ensure the drain pipe opening faces down towards the floor. Best of luck.

Do you need to evac the ac system to replace the heater core?

yes it needs evac and recharge because dash and heater unit need to come out prior to replacing the heater core.

WOULD LIKE TO GET SOME IMAGES ON HOW TO FIX OR REPLACE MY HEATER CORE THE EASIEST WOULD BE GREAT

Almost Every thing in front dash has to come out the car are you sure its the heatre core no good ? Drain engine coolant remove heater hoses at fire wall and plug remove 3 retaining nuts under hood (fire wall) remove instrument panel remove right side retaining screw remove remaining nut under dash panel stud disconnect blue connector from plenum remove heater assembly from car remove clips and screws good luck

2000 Dodge Neon

how to change heater core

I believe the heater core has gone up in our Neon. We have replaced the thermostat and everything else still runs fine, but no heat. I can do most things when it comes to engines, but have never had to replace a heater core. Could you please inform me on the steps to do so? Thanks so much

Best bet is to check the manual.
https://www.2carpros.com/kpages/auto_repair_manuals.htm

You can try to backflush the heater core by disconnecting the heater hoses and running a garden hose through the exiting side back into the core and out the ingoing line.

[quote:793aebbb14="Service Writer"]Best bet is to check the manual.
https://www.2carpros.com/kpages/auto_repair_manuals.htm

You can try to backflush the heater core by disconnecting the heater hoses and running a garden hose through the exiting side back into the core and out the ingoing line.[/quote:793aebbb14]

How do i tell which one is exit/intake? I also have a new problem now where when put in gear you have to really lay on the gas pedal/the rpms have to be high to get to even barely move. Transmission fluid or need new trans?

Put the heater core on the back burner.

IS the transmission fluid full, if not fill it with atf + 4 transmission fluid only. Check it while it is in park and the engine running..

[quote:4f7ffe1f13="Service Writer"]Put the heater core on the back burner.

IS the transmission fluid full, if not fill it with atf + 4 transmission fluid only. Check it while it is in park and the engine running..[/quote:4f7ffe1f13]


Well, we have discovered a problem that is not helping. There is a plastic pipe that runs out from the water pump into piping/tubing to the radiator. This pip has a crack in it and so it is not holding any coolant, so we cannot run the vehicle. Do you by chance know what this is called? A friend told us we would not be able to buy this pipe from Chrysler/dodge and would have to hope to find one at a junk yard. Is this so? It's a small pipe, and it doesn't come with the water pump but does somehow connect to it. Any help is greatly appreciated. Thanks in advance.

Single or dual overhead cam motor?

Sounds like a by-pass hose. Call a parts store and ask.

[quote:444abd06a8="Service Writer"]Single or dual overhead cam motor?

Sounds like a by-pass hose. Call a parts store and ask.[/quote:444abd06a8]

Its single, and the parts stores around seem to not know either.

Call the dealer and ask for

#4777171AB

it is still available, but may need to be ordered. About 12-15 bucks.