2007 EL XLT, rear cooling core/coil

[DD31]

I'm trying to find a rear cooling core/coil for my 2007 EL XLT. I ordered what what supposed to be the right one from Rock Auto but it does not fit. Ford seems to think I need to buy an entire new rear hvac unit for $700... but ive had the coil out so I know it can be replaced independently. Any help finding the correct coil for it will be GREATLY appreciated. I cant get my AC to work without it, unless someone makes a block off plate for the freon lines for this year/model

Thanks!

 

[stamp11127]

What is the part number and brand you received from rockauto? Also check the same part for a 2006 and 2008 to see if the number changed.

 

[ads245]

This seems a bit strange. From what I can find, it looks like the Evaporator Core for the EL is different than the Standard Expedition. Rock Auto offers the standard coil (which I'm thinking is what you purchased) here:

http://www.rockauto.com/en/catalog/...t+&+air+conditioning,a/c+evaporator+core,6768

Looking here, you can see it specs the standard evaporator coil is 5L1Z-19860-CA (this matches the Rock cross reference) for $81.43 at the top of the page. Whereas scrolling to the bottom of the page for the EL, you can see that for whatever reason the individual coil isn't listed, rather the entire assembly with the coil included is 8L1Z-18D283-B for $748.18.

https://www.tascaparts.com/auto-par...-engine/hvac-cat/auxiliary-heater-and-ac-scat

I also checked FordPartsGiant.com and the parts fiche yielded the same thing where the EL evaporator coil isn't listed individually.

Is there a part number on your coil out of your EL?

 

[DD31]

Thank you for the help so far. That is similar to what I found. It seems very odd that they want me to buy the entire unit vs just buying the evaporator coil. Behr K8494 is the number on the existing evaporator coil in the truck

 

[ads245]

Hmm, too bad Ford didn't have their part number inscribed on the coil. Just curious, but what happened to your coil that you need to replace it?

 

[DD31]

The existing coil developed corrosion just above the connector and has a pinhole in the tube. I didn't see any other part numbers on it

 

[stamp11127]

Check here:

https://www.autopartswarehouse.com/search/?Ntt=Behr+A/C+Evaporator

 

[Adieu]

The existing coil developed corrosion just above the connector and has a pinhole in the tube. I didn't see any other part numbers on it

Patch it

 

[stamp11127]

What is he supposed to patch it with?

 

[gixer2000]

What is he supposed to patch it with?

You can actually use a 2 part epoxy considering its in the low pressure side of the system but as an hvac technician I would recommend that being a temporary repair

 

[Adieu]

Depends where the damage is, I guess??

Epoxy or weld

 

[ExpeditionAndy]

Fill the coil with nitrogen and braze the hole shut. I've seen it done before and it works.

 

[gixer2000]

Fill the coil with nitrogen and braze the hole shut. I've seen it done before and it works.

Thats a good point because we repair aluminum microchannel coils that way. I didn't even think about doing it on this.

 

[ExpeditionAndy]

Thats a good point because we repair aluminum microchannel coils that way. I didn't even think about doing it on this.

I worked in the HVAC field for over 30 years, I worked for York International for 13 years in various positions. I spent 3-1/2 years in technical training back in the late 90s. I learned a lot of interesting tricks from technicians.

 

[Adieu]

Why nitrogen though?

 

[ExpeditionAndy]

Why nitrogen though?

It keeps carbon from forming inside the tube during the brazing or soldering process. That keeps the inside of the system clean once it is reassembled, evacuated, and charged.

 

[gixer2000]

Why nitrogen though?

It's an inert gas and wont cause any ash build up inside the piping/coil. If you braze without nitrogen the oxygen inside burns and causes the ash.

When we do micro channel coils the nitrogen also helps keep the micro passages in the coil free of obstruction from the braze

 

[gixer2000]

It keeps carbon from forming inside the tube during the brazing or soldering process. That keeps the inside of the system clean once it is reassembled, evacuated, and charged.

He beat me...

 

[stamp11127]

I was under the impression that the pag oil would interfere with repairing evap and condensers. So I did a little reading and came across this:

http://www.millerwelds.com/resource...ssions/8551-aluminum-brazing-vs-welding/page1

If you have the needed equipment or know of a place that performs these repairs, it would be worth a shot - if you don't you are better off replacing the part just based on cost.

Learned something new today....

 

[ExpeditionAndy]

Most A/C shops these days have all of the equipment to weld or braze aluminum. Many home A/C manufacturers have gone with aluminum tube and fin, spiny fin, or micro-channel coils. There are still some copper tube aluminum fin coils out there but not as many as in the past.