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  #1  
Old 09-09-2008, 09:07 AM
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Gambler68 Gambler68 is offline
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Join Date: Feb 29, 2004
Location: Ignacio, Colorado, USA
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Rebuilding a metal Gladiator era Heater Core Box w/ pix (tech)

Well it looked ok from the outside, but I wanted to resurface the flappers with neophrene so it wouldn't be blowing hot air during the summer like so many do..they do this because the air flow flaps on the core AND the inner blower box are lined with foam that degrades over time and don't seal. After checking that the vac switches were still good I went ahead and got busy..

First the inner box. In very nice shape for being 40 years old. Still had the inspection stickers on it.









Next the heater core box. Simply dumping out the leaves is NOT good enough..you need to open it up. It's easy.


looks good right?

ick!

ack!

don't lose these. They are the main reason for all the rust gunk in there.

see how the flapper foam seal is useless at this point from time

leave the flapper in there and remove the airflow thingy

scrape it clean with a chisel or whatever

I used neophrene from a knee brace that was laying around..

sorry camera was in night mode. But you can see the nice seal now. Do both sides of course.

look at that NICE clean core. I flushed mine out in the shower and sprayed the fins out with normal pressure hot water. A few good flakes came out and some assorted gunk. Be sure to really get the inside clean and move it around while water is flowing. Re-install pieces in reverse order of disassembling (maybe I should go work for Haynes eh?)



Inner box got RTV. Didnt bother with the outer seal.

put back together. Sadly I had to reuse original 1/4" head screws, added some larger ones where they had wallowed out.

painted! I will add foam to the inlet/outlet and around the fresh air inlet and blower outlet later when I install

speaking of..does it still work? Yes! Battery jumper with on/off switch confirms.

paint it black!

Hope this was helpful to anyone wondering. Early style metal boxes do not swap. That bottom piece on the blower is absent in the later style, so they do not line up if you try and mix and match. I would assume if you replaced the ENTIRE HVAC system (newer style into an older cab) it would work of course..but where's the fun in that. Plastic sucks.
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Old 09-09-2008, 09:35 AM
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tgreese tgreese is offline
 
Join Date: May 29, 2003
Location: Medford MA USA
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Heh. Somehow your write-up reminds me of the Rolling Stones.

Very nice - thanks for posting.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
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Old 09-09-2008, 10:04 AM
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red mistress red mistress is offline
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Join Date: Sep 13, 2007
Location: TX
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heater core

The heater cores from early years are little different than the new ones.

Spacing of heater tubes and the thickness of the core.

Newer heater core can be made to work with carbide cutter, but treasure hunting & finding a NOS one is so much fun.

I think I need Laura Croft on my treasure hunting team.
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  #4  
Old 09-09-2008, 10:18 AM
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orangecherokee orangecherokee is offline
 
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Location: Kingsport, TN
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If anyone needs a heater box, blower motor or under dash vent system let me know. I just stripped all of this out mine and don't need it anymore.
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Quote:
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I would think boxing would limit the amount the frame could flex over obstacles which I think IMO would be a bad thing. I would think you would want all the articulation possible.
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Old 09-09-2008, 12:16 PM
budojeepr budojeepr is offline
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Somebody "sticky" this!
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Old 09-09-2008, 12:38 PM
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Gambler68 Gambler68 is offline
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Quote:
Originally Posted by budojeepr
Somebody "sticky" this!

there is a thread stickied for Tech Archives in the index in this forum. If someone deems it worthy, feel free to reply there with a link to this thread.

Hopefully this thread will help save a few of the old metal boxes! I'm sure rad shops will rebuild them but since its so easy and doesnt take long to rehab it yourself, why spend the $$
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1979 Chero S "Sundog" 1979 Chero S "Hammer"
1968 327 J3000 1978 J10SWB
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