Rear heater core replacement instructions

Tiny
RANGEREGR
  • MEMBER
  • 1999 FORD EXPEDITION
Leaks coolant under rear heater core. Drips just behind left rear tire. Drains the cooling system. Appears to be running from an overflow tube under the vehicle, directly beneath rear heater. No broken hoses or lines. No coolant inside the vehicle. What is wrong?
Thursday, September 11th, 2008 AT 10:19 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

Replacement of the auxiliary heater core is a someone big job. However, if you take your time, you should be fine.

First, you will need to evacuate Freon from the air conditioning unit. Here is a link you may find helpful for both evacuating and recharging.

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

If you look at the attachments below, I attached the directions and pictures specific to your vehicle for replacement.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.

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Tuesday, June 1st, 2021 AT 9:07 PM

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