Leaking antifreeze onto floor board

Tiny
WILLIAM4111
  • MEMBER
  • 2007 DODGE NITRO
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
I need instructions on how to replace heater core. I have antifreeze leaking in side of my car.
Thursday, October 12th, 2017 AT 9:00 PM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

You will need to vacuum down the A/C system and then recharge it once you are down.

Here is a guide that will help you with that:

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

Here is a guide that will give you an little idea of what you are in for when doing the job:

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

I found these diagrams for you on what it will be like on your car (below).

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Friday, October 13th, 2017 AT 11:56 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,576 POSTS
Not a fun job. The job basically means stripping out the dash to get to the HVAC case so you can remove it to get to the core. This is an outline of the process.

Drain the coolant, recover the refrigerant from the AC system. Disconnect the battery.
Remove the seats, then the center console. remove the trim from the windshield pillars and the lower close out panels and kick panels. Unbolt and remove the steering column. Remove the vent panel at the base of the windshield and remove all the bolts that hold the dash to the body. Disconnect the electrical connections and remove the dash from the vehicle. Then you can remove the HVAC case to get to the cores.

If you plan on doing this yourself you will be much better off getting a one year subscription to Alldatadiy https://www.alldatadiy.com/ that is about thirty dollars for one vehicle.
That way you have all of the various pieces to the puzzle and images of all the bolts/wires/clips involved.
Plus when you start and it says "remove center console" you can refer to that process, where it will tell you "remove the seats"
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Friday, October 13th, 2017 AT 12:12 PM

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