Heater core - Chevy Impala SS Forum
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post #1 of 4 (permalink) Old 01-26-2015, 07:56 AM Thread Starter
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Heater core

I've flushed my heater core and replaced the thermostat a few months ago. The heat is going out again. Just curious if any one has replaced a heater core before? I looked online but I can't find a good description on how to take it out. 94 Caprice
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post #2 of 4 (permalink) Old 01-26-2015, 08:25 AM
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Take a look at this for pictures at least.

1994 SS
- GRAIL Webmaster, St. Louis, MO
View our Tech/Guide page for everything from your basic oil change to Manual transmission swaps!

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post #3 of 4 (permalink) Old 01-26-2015, 09:05 AM
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Just do a Search "heater Core Replace" and you will find threads and maybe the Stickies at the top of the coolant section will have info. I believe the Chilton Manual ($20 at most stores) also has this documented. Pretty straight forward project really with one "Bugger" of a screw to get to near the FW thats in a tough spot to reach. Removal of the Passenger Seat was a big help for me and only took a few minutes and well worth the extra space you get to work.

Once you get the Plastic cover off, you will notice a seal of some sort in the Channel that seals it to the bottom of the box. I just used RTV in the Channel and it appears the factory did this as well. Let it set up for a good while and then install.

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'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.
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post #4 of 4 (permalink) Old 01-26-2015, 10:09 AM
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When you flushed the core did you flush the whole cooling system? Unfortunately any gunk in the system will wind up in the core and multiple flushes may be needed. I wouldn't replace the core unless it is leaking, it is not a fun job.

Don Rundgren
McKinney, Texas
1996 Caprice 9C1
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