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PostPosted: Sat May 05, 2012 12:39 pm 
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So I have searched and found a few threads both here and other sites about heater core replacement. It seems there is not a definitive method of doing this.

Does one really have to remove the whole freakin' dash to get this done?

Does anyone have photos of how to do this job?

A copy of the FSM showing how this is done?

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NotDadsW41
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1991 W41 #142
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PostPosted: Sat May 05, 2012 5:18 pm 
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Location: Ponca City, OK 74601
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We did not remove the dash on my son's 95. It was very tight, but do-able. You will need some hose clamp pliers to get the hoses off, sold at Sears, however I got mine at Autozone. ECM removal seems almost mandatory also, but once you remove 2 screws, unplug the airmix actuator and rod, its free to slide off. Carpet will give you a battle. But the core is easily removed once that cover is out of the way.

My hands were not personally involved in the repair, but I watched closely as my son did the job and got up to speed on how much profanity he knew :roll: lol. He was sure glad to put the tools up that evening, but its less pain than removing the dash

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PostPosted: Sat May 05, 2012 6:40 pm 
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I had the hose clamp pliers in the tool box already. Getting the hoses off was easy with the right tools. But I can't even see where to get that box cover out with out removing the dash right now.

Anyone has pics of doing this job?

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NotDadsW41
Site Owner/Admin - http://www.b-body.org
1991 W41 #142
1995 Astro
1989 9C1
1997 C1500
1997 Bonneville

"No sacrifice or service of mine requires any other reward than that which conscience gives to every man who does his duty" - Joshua Lawrence Chamberlain


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PostPosted: Sat May 05, 2012 7:40 pm 
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Digging under here more, it seems given I have the electronic control HVAC (EEC I think you guys call it) that this is complicating things under there. A lot.

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NotDadsW41
Site Owner/Admin - http://www.b-body.org
1991 W41 #142
1995 Astro
1989 9C1
1997 C1500
1997 Bonneville

"No sacrifice or service of mine requires any other reward than that which conscience gives to every man who does his duty" - Joshua Lawrence Chamberlain


Last edited by NotDadsW41 on Sat May 05, 2012 7:41 pm, edited 1 time in total.

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PostPosted: Sun May 06, 2012 2:23 am 
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It is not a fun job at all.The cover for the heater core will come out but must be done with the carpet and pad pulled back out of the way.It also helps a lot to remove the passenger seat for more room(not necessary,but makes it easier to work on your back).I do not have any pics,sorry.I know when I did mine it was a battle to figure out the right position for the cover to come out,and go back in,so remember how it came out,wish I would have :banghead: .
I have one with ECC and one without and have done both heater cores, neither was easy or quickly done.
It is a great time to flush your system of all the old coolant,since you will be removing most of it anyway.
I used this link for some info,maybe you can see some things here that will help.good wrenching.
http://trialsnuts.com/ecc.pdf


Last edited by Pontiac1 on Sun May 06, 2012 2:25 am, edited 1 time in total.

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PostPosted: Sun May 06, 2012 12:06 pm 
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Holy Hell! That is about the best I have seen so far! It still looks like a PITA job that I might end up paying someone to do. Can't believe I'm saying that...

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NotDadsW41
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1991 W41 #142
1995 Astro
1989 9C1
1997 C1500
1997 Bonneville

"No sacrifice or service of mine requires any other reward than that which conscience gives to every man who does his duty" - Joshua Lawrence Chamberlain


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PostPosted: Sun May 06, 2012 12:26 pm 
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Location: Ponca City, OK 74601
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It is. If the one in the 99 ever goes out I will likely sub it out to a shop also lol. I did one in my old 1990, it wasnt nearly as bad.

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Glenn
1990 LE 215k L67 starter, Delco Ignition (sold and gone to a new home)
1995 SE 259k Stock for now (Sold and gone to a new home)
1999 SLE 70k Stock for now
http://www.cardomain.com/memberpage/593472


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PostPosted: Sun May 06, 2012 12:59 pm 
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After watching my son replace the heater core twice, I think that not having to remove the dash may have a good deal to do with how big you and your hands are and how flexible you are. It is no piece of cake, that's for sure. I have gotten to know the dash well enough to not need help with it until it is time to lift it out of the car - lol. - BC

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2005 Bonneville SE 1SC 205 HP L36 4T65E ..... 1992 Bonneville SSE 1SB 170 HP L27 4T60E ..... 2013 Cadillac CTS 1SD 270 HP LF1 6L50
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PostPosted: Sun May 06, 2012 7:42 pm 
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Well, I am still waiting for another part to come in before I dig further on this.

But right now I have unofficially thrown the "F@#$ It" flag.

I'm too old and fat to be lying on my back contorting myself to get this done. I'm going to end up paying someone to do this job I think.

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NotDadsW41
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1991 W41 #142
1995 Astro
1989 9C1
1997 C1500
1997 Bonneville

"No sacrifice or service of mine requires any other reward than that which conscience gives to every man who does his duty" - Joshua Lawrence Chamberlain


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PostPosted: Sun May 06, 2012 9:32 pm 
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Location: Portland, OR... Nine months of rain per year, yet wicked expensive tap water...
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NotDadsW41 wrote:
. I'm going to end up paying someone to do this job I think.


Not the worst thing you can do. The mechanic needs to pay his mortgage too... Sometimes the operation requires a specialist.


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PostPosted: Mon May 07, 2012 8:14 am 
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Yeah I know Madcarpenter. I prefer to do my own work though if possible. This won't be the first or last time this has happened. I know that.

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NotDadsW41
Site Owner/Admin - http://www.b-body.org
1991 W41 #142
1995 Astro
1989 9C1
1997 C1500
1997 Bonneville

"No sacrifice or service of mine requires any other reward than that which conscience gives to every man who does his duty" - Joshua Lawrence Chamberlain


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PostPosted: Sat May 12, 2012 8:54 am 
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NotDadsW41 wrote:
Yeah I know Madcarpenter. I prefer to do my own work though if possible. This won't be the first or last time this has happened. I know that.


Mine was "eating" heater cores until I put a ground strap on it. You may want to do that as a precaution. - BC

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2005 Bonneville SE 1SC 205 HP L36 4T65E ..... 1992 Bonneville SSE 1SB 170 HP L27 4T60E ..... 2013 Cadillac CTS 1SD 270 HP LF1 6L50
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