Heater Core Replacement (non-A/C)

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My heater core was leaking when I hooked it back up last week so I replaced it over the weekend.

I followed the suggestions from this forum AND the repair manual and it went pretty easy.

Dropped the inner fender for access to the bottom fasteners.



Propped up the hood and undid the passenger side hood hinge (after marking its location first). Used a block of wood to protect the fender, the hood and hinge slide forward enough to allow for easy removal of the heater box.





Removed:



If you ever wondered why leaves fly out of the ducts when you turn on the heat/defrost, its because there's 40 years of leaves in the heater box.





I only ran into one snag, the first core I got from Advance Auto was aluminum and did not fit, the ends of the core were not the same shape as the original so the bracket didn't fit.

Took it back and the parts girl called another store about 10 miles away and asked them to look up the same part number and they had one that was brass and correct. The guy at that store said he figures it had been on the shelf for 10 years or more.

I used plumbers putty to seal the box back to the firewall and I lubed the cables while I was at it (it was raining and I was outside so no pics of putting it back together)...now it will run you out of the truck.

Here is another thread with more pics: http://67-72chevytrucks.com/vboard/s...ad.php?t=69812