Changing heater core

PeteyAce · Feb 6, 2007

Ok, i had a post yesterday bout not having heat in my car, i changed my thermostat and now i had heat in burst but still got cold, so then i thought maybe there was a clog somewhere and went to get it flushed out at my uncles shop, he blew out the heater and now ::drum roll:: its leaking! im getting some coolant inside and that nice greenish fog right above my dash ( i wasnt getting this before i went to the shop), so now i need a new heater core, i searched but where can i find a step by step guide on how to change my heater core?

Final5pt0 · Feb 6, 2007

This is what i used to do mine....have fun its quite a nerve testing job. Its not really hard its just time consuming/frustrating
http://www.mustangmonthly.com/howto/5652/

bullitstang1313 · Feb 6, 2007

It gives pretty good instructions in the Haynes manual. Its not all that difficult, but it is a time consuming process.

webshot · Feb 6, 2007

Search for my post about this subject. I got good responses and the links in it I used to do mine. It was my first one and took me about 3.5 hours.

BK_CAULEY · Feb 6, 2007

STICKIES

http://forums.stangnet.com/showthread.php?t=646250

jrichker · Feb 6, 2007

See http://home.netcom.com/~skent/mustang/1990/heater_core/hcore.html

giddyup306 · Feb 6, 2007

If you are cheap and lazy like me you might want to try blowing it out first. At the other dealership I used to work for we had a professional kit that put pressurized water in the heater core. I don't have such a tool now but I try to use a variable flow blow gun and a rubber tip. Ease pressure into the heater core SLOWLY. Then try and flush it both ways. 99% of the time this will work. It will save you time and money if it works. In the worst case scenerio you will either A) have your heater core not work which it does not already or B) get a hole in the HC which needs to be replaced anyways if this does not work (that has never happened to me).

795.0pacecar · Feb 6, 2007

giddyup306 said:
If you are cheap and lazy like me you might want to try blowing it out first. At the other dealership I used to work for we had a professional kit that put pressurized water in the heater core. I don't have such a tool now but I try to use a variable flow blow gun and a rubber tip. Ease pressure into the heater core SLOWLY. Then try and flush it both ways. 99% of the time this will work. It will save you time and money if it works. In the worst case scenerio you will either A) have your heater core not work which it does not already or B) get a hole in the HC which needs to be replaced anyways if this does not work (that has never happened to me).

Apparently you just reply to the titles of threads instead of actually reading the posts.

Changing the heater core sucks. It took me a good 2 or 3 hours to do mine. The worst part is there is barely enough room to get the heater core out once you get the dash pulled back, so you'll end up with lots of tiny little scrapes and cuts all over your hands.

giddyup306 · Feb 6, 2007

795.0pacecar said:
Apparently you just reply to the titles of threads instead of actually reading the posts.

Yep. Did you read where it said I was lazy? First sentence...

795.0pacecar said:
Changing the heater core sucks. It took me a good 2 or 3 hours to do mine. The worst part is there is barely enough room to get the heater core out once you get the dash pulled back, so you'll end up with lots of tiny little scrapes and cuts all over your hands.

Poor baby do a heater core on an explorer. Book time for some of those are 8-12 hours.

795.0pacecar · Feb 6, 2007

Hey now, those cuts hurt when you get anti freeze in em'.

giddyup306 · Feb 6, 2007

795.0pacecar said:
Hey now, those cuts hurt when you get anti freeze in em'.

Get a drop of brake clean in your eye. That SUCKS!

795.0pacecar · Feb 6, 2007

I'm highly allergic to brake clean, if I get any on my hands, they swell up red and my skin basically burns off where ever it touched. I'm actually at the end of recovering from that right now, my hands still have some scab on the tops of them.

Brake fluid doesn't feel great in your eyes either.

giddyup306 · Feb 6, 2007

795.0pacecar said:
I'm highly allergic to brake clean, if I get any on my hands, they swell up red and my skin basically burns off where ever it touched. I'm actually at the end of recovering from that right now, my hands still have some scab on the tops of them.

Brake fluid doesn't feel great in your eyes either.

Once I got a giant drop of brake kleen in the eye ( I had sprayed away excessive oil to locate an oil leak) and bam the biggest damn drop fell smack dab in the middle of my eye. That really sucks.

Imagine what that crap will do to your eyeball!

gtxracing · Feb 7, 2007

giddyup306 said:
Get a drop of brake clean in your eye. That SUCKS!

Get 93 octane fuel up your nose, then you can talk... LOL:Zip2:

89streetbeast · Feb 7, 2007

gtxracing said:
Get 93 octane fuel up your nose, then you can talk... LOL:Zip2:

had a similar run in like that. 93 octane down my whole frontside neck to feet

man that burned for a few days if you know what i mean lol.

marvizu · Feb 8, 2007

What's the story with the restrictor that's suppose to be in one of the hoses? It's not mentioned in most of the threads that I have been looking at throught the search. My son has my car in AZ and the heater core went out. We decided to replace the core instead of bypass it since it would be a good learning experience for him ( he's going to UTI in Avondale ). He is seeing steam again but no water on the floorboard. He was at AMP yesterday buying another part for the car and he brought up the heater core issue. He was told that if you don't have the restrictor it will blow the heater core. He also said that that the new core or hose ( were ever the restrictor is ) does not come with one. More info on this would be greatly appriciated.

Daggar · Feb 8, 2007

Just get yourself a round chunk of metal (preferably brass) and drill a 3/8 to 1/2 inch hole in the middle. Place it in the pressure side of the system before it goes into the core.

TRWXXA · Feb 8, 2007

marvizu said:
What's the story with the restrictor that's suppose to be in one of the hoses? It's not mentioned in most of the threads that I have been looking at throught the search. My son has my car in AZ and the heater core went out. We decided to replace the core instead of bypass it since it would be a good learning experience for him ( he's going to UTI in Avondale ). He is seeing steam again but no water on the floorboard. He was at AMP yesterday buying another part for the car and he brought up the heater core issue. He was told that if you don't have the restrictor it will blow the heater core. He also said that that the new core or hose ( were ever the restrictor is ) does not come with one. More info on this would be greatly appriciated.

Correct. The new hoses will not come with a restrictor. Here is some info from a technical service bulletin about relocating the restrictor to prevent it from dislodging from it's original position. Image 2 has the part number for the restrictor.

DucatiRdr · Feb 9, 2007

Daggar said:
Just get yourself a round chunk of metal (preferably brass) and drill a 3/8 to 1/2 inch hole in the middle. Place it in the pressure side of the system before it goes into the core.

It's 19* outside today and my car is covered... What is the size of brass round stock?

marvizu · Feb 9, 2007

Thanks, that helps.

Changing heater core

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