Chevy Impala SS Forum banner
1 - 6 of 6 Posts

· Registered
Joined
·
52 Posts
Discussion Starter · #1 ·
I've searched here and Googled around and been unable to find any useful pictures of the area around the heater core and thought I would help out by posting some up.

There is one hidden 7/32" screw holding the heater core lower box on to the upper part in the back, almost against the firewall. You can not see this one, it is up on the back side.

I followed Qalo's SS handbook to get this far. I'm thinking I'll try to find a bar and plate type fluid cooler to use as a heater core, if I can find one around the correct dimensions. It appears that the core can be slightly larger than the stock piece if you are willing to trim the box around it. This opens up the choices for cheap oil coolers since almost none are as small as the stock core. Maybe 11" x 7.5" x 2"?








I’m hoping I can remove some of the ribbing from this area to gain the space needed for a more robust solution. I’m planning on removing the restrictor tee and I’ve read that it is there to prevent damage to the core at higher RPMs and don’t want to have to fix anything again.
 

· Registered
Joined
·
428 Posts
i would be interested to see what you come up with. my heater core has had it and i have been wanting to remove the restrict-or so it doesn't fail and leave me stranded.
 

· Registered
Joined
·
1,934 Posts
I have a complete hvac assembly (less the lower cover) sitting on the shelf. I'll post up pics if that will help.

.?
 

· Registered
Joined
·
52 Posts
Discussion Starter · #4 ·
It would help me to see the top side of the plastic box. I can't quite see how much room I have to cut away material and if that chamber has to be 100% divided or sealed from the air con area. Looks like it does. If this endeavor becomes too expensive it will be over. I can't find ANY cheap mass produced fluid coolers that are the same size and shape as the heater core with the fittings on the end.

I did find a cooler for a computer processor here:
http://www.sidewindercomputers.com/swmcqupo2x.html
Correct shape but the fittings are 1/4"

Here is another promising shape, but the inlet and outlet are not on the end and it's a bit pricey for an experiment:

https://www.google.com/shopping/pro...=287&ei=VbADVIeEH9CPNreugaAD&ved=0CLcCEKYrMAw

It seems odd to spend $100-$300 on hoses, build a custom T, worm drive or T-bolt clamps, divorced all aluminum fluid coolers, -an lines, thermostats, huge modular radiator (and that's the cheapest part???) or $175 all aluminum combined radiator and fluid cooler, just to stick a brazed thin wall box with rubber o-ring tubes that have been crushed onto it under your dash and hope it doesn't leak for awhile.
 

· Registered
Joined
·
8,012 Posts
I still have my stock one,and if it were to begin to leak. Then I would consider taking it to a radiator shop for repair,and re-install it...
 

· Registered
Joined
·
7,785 Posts
I've searched here and Googled around and been unable to find any useful pictures of the area around the heater core and thought I would help out by posting some up.

There is one hidden 7/32" screw holding the heater core lower box on to the upper part in the back, almost against the firewall. You can not see this one, it is up on the back side.

I followed Qalo's SS handbook to get this far. I'm thinking I'll try to find a bar and plate type fluid cooler to use as a heater core, if I can find one around the correct dimensions. It appears that the core can be slightly larger than the stock piece if you are willing to trim the box around it. This opens up the choices for cheap oil coolers since almost none are as small as the stock core. Maybe 11" x 7.5" x 2"?








I’m hoping I can remove some of the ribbing from this area to gain the space needed for a more robust solution. I’m planning on removing the restrictor tee and I’ve read that it is there to prevent damage to the core at higher RPMs and don’t want to have to fix anything again.
Is there a sudden shortage of replacement heater cores? I know....that was a sarcastic comment. :) As far as I know, there are plenty of aftermarket and GM replacements still out there. I recently bought a GM unit and installed in my car. Not a fun job but easier with the pass seat removed. And yes, some of those screws are hard to get to but very doable.

While what you are attempting to do should be commended, I would again ask....WHY? I could see doing this if replacement parts were not available and you needed to get creative. Just seems like a lot of work and possibly messing up other functions of the system if not designed or modified properly and what are you really gaining by doing this? In addition to the core/cooler fitting the plastic air box correctly, you will also need to fabricate some sort of fittings to come through the FIrewall for the heater hoses.

As far as I know, the real problems with stock heater cores are they become clogged and don't provide heat. The other issue is they can develop leaks and need replacement. I would most likely not even bother repairing the core since other areas of the HC could be compromised and its a pain to replace, so I would just throw a new part in there. Not to mention, there just aren't as many radiator repair shops in my area as there used to be back in the day. Replacement parts are just more cost effective...IMHO
 
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top