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Thread: 1st Gen Heater Core

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    1st Gen Heater Core

    PO removed the whole heater/defrost assembly because he thought the core was leaking. Could have been bad hoses or connections??? Is there a good old backyard way of testing if it leaks??

    Anyway, does this look like the correct core? Since it's all taken apart, maybe I should just replace it. Or send out the original to a reman company? Anybody know a good place?

    Click image for larger version. 

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    Quote Originally Posted by VanSandy View Post
    PO removed the whole heater/defrost assembly because he thought the core was leaking. Could have been bad hoses or connections??? Is there a good old backyard way of testing if it leaks??

    Anyway, does this look like the correct core? Since it's all taken apart, maybe I should just replace it. Or send out the original to a reman company? Anybody know a good place?
    Click image for larger version. 

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    I tested mine maybe this will help https://youtu.be/wATo-U8RlWA
    Last edited by vulch; 11-08-2019 at 08:09 PM.

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    1st Gen Heater Core

    A radiator shop will test it also.

    A second reference for you:
    Click image for larger version. 

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    Last edited by gfleduc; 11-09-2019 at 04:55 AM.
    Gary
    1965 Display

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    thanks - did you buy the vista-pro part direct from them?

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    1st Gen Heater Core

    I did not - That photo is from a fellow vanner.

    At a higher cost I had taken mine to the radiator shop.
    Gary
    1965 Display

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    VCVC Member garagedoordennis's Avatar
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    I was able to order a brand new one from rockauto.com
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

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    Quote Originally Posted by garagedoordennis View Post
    I was able to order a brand new one from rockauto.com
    Dennis,

    I saw that as well, but the picture they show is different, it seems all the sellers show the same generic picture for these cores. I think I'll order from Rock Auto, thanks. If it's not right I'll send it back.

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    VCVC Member garagedoordennis's Avatar
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    Quote Originally Posted by VanSandy View Post
    Dennis,

    I saw that as well, but the picture they show is different, it seems all the sellers show the same generic picture for these cores. I think I'll order from Rock Auto, thanks. If it's not right I'll send it back.
    Thats what i did ...the picture is not what they will send you. When i opened it i was smiling ear to ear !
    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

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    VCVC Member ShawnM's Avatar
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    I had mine re-cored

    Got mine re-cored for about $200 in Lowell MA by an old dude in an ancient toxic shop who had been doing re-coring since Moby Dick was a minnow

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    VCVC Member kookykrispy's Avatar
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    Quote Originally Posted by gfleduc View Post
    A radiator shop will test it also.

    A second reference for you:
    Click image for larger version. 

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    I took that picture. I ordered the heater core from advance auto parts. Still working good in the wikivan after 8 years. Here is the original thread from 2011 where I discuss:

    http://vintage-vans.forumotion.com/t...en-heater-core



    64' wikivan 230/4 onda tree/2.56 posi
    '64 Red Baron no engine/trans
    '66 "Lucky" 230/3 onda tree/project

    Quote Originally Posted by Vanner68 View Post
    Remember, they're still printing money, but they aren't making any more earlies!

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    VCVC Member Wookee's Avatar
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    Cool

    That was a prett cool repair video.
    The solder gun operator made it look easy...
    Its a "van thing". A life style you have to live to understand!!!!

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    Rock Auto is out of stock on these. :-(

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    1st Gen Heater Core

    There are other suppliers
    Gary
    1965 Display

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    I have not found them so if you have names/links that would be great. I tried to google some places I could it for re-core but all I got was ads for radiator repair and general auto repair shops, nothing that looked like they had the setup for a recore.

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    Found one on ePay, shipping was a ripoff... We'll see what shows up and if it matches but seemed to match other sites who were out of stock. No one had the correct picture of what we have.

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    VCVC Member Buddy's Avatar
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    9010298 heater core. Rock Auto # I just checked says one left in stock.Click image for larger version. 

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    Huh, still showing out of stock for me under 1965 and 1966. I'll just wait to see what the eBay seller sends me.

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    OK, so the good news is I have heat! The bad news is I still don't have a functioning fan. The fan/blower itself works, I tested that with a direct current. But the resistor or switch, or both, are bad. See other threads...

    The heater core I received is the correct size, just a couple of hairs too big but I wedged it in the box. However, the tube bends were not that great and had to be adjusted to feed the tubes through the hole in the floor. I was nervous trying to bend them because I didn't want to mess up the soldering and end up with another leaking core. The other problem I encountered is that there is almost zero room for your hands under the van to attach the hoses and clamps. The small hose went on OK but the larger one was a PITA. If I had it to do over I would put the loose clamps on the hoses, then snake the hoses up through the hole in the floor, get them on the copper tubes inside the van, then run all that back down under the van. With a long extension on the ratchet tightening the clamps from under the van wasn't a hassle.

    As long as the van is moving the air coming through the nose vent pushes plenty of heat into the driver passenger area. Good enough for around here where it rarely dips below 40 degrees.

    So now I am waiting on fan parts - new resistor, need to find a source for the switch, and I have a cable enabled hose shut off valve on order.

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    Heater switch

    P/n 3843526
    Gary
    1965 Display

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    Quote Originally Posted by gfleduc View Post
    P/n 3843526
    Thanks. Still can't find anyone stocking it, or even a universal rotary switch. I'm about ready to pull out my Telecaster switch and try to mod that!

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    OK, so everything is back together. I still can't get the fan to work via dash switch. I tried it with the new switch and the old one (old one works), and the new resistor. When ignition is turned to "On", and fan switch is turned to "On", I can fire the fan with a jumper from the battery to motor post. When either is in the "Off" position, the jumper does not fire the motor. So I think the connections are good. When I put the orange wire back on from the resistor assembly to the motor, the fan won't come on with either the new or old switch. :-(

    I'm sure I'm missing something simple, or the orange wire is bad, or the resistor wire(s) connector is dirty/bad. The fuse looks good. And if the fuse were bad, my jump wire tests wouldn't work???

    Anyway, when the Air lever is "On" plenty of air flows in over the core and provides lots of heat. Same with Defrost. If I was driving around in 20 degree weather maybe not, but why would I do that?? ha ha.

    I still have to install the inline hose valve to turn off the hot coolant flowing to the core when the weather is nice. I bought a cable ready one. Has anyone rigged up a cable for this? I guess I'll have to drill a hole in the dog house to install a cable knob like the one for the choke. Or maybe put the valve under the van near the core and run the cable up to the dash. That would be cool. No pun intended....

    Click image for larger version. 

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    Last edited by VanSandy; 01-22-2020 at 05:49 PM.

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    1st Gen Heater Core

    For you to verify wiring...

    Click image for larger version. 

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    Last edited by gfleduc; 01-22-2020 at 08:35 PM.

  23. #23
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    I dunno. Wiring looks all stock and I didn't change any of it. There is a blue, yellow, and orange (maybe it used to be red) coming off the top three prongs of the switch, and reconnecting at the corresponding three prongs of the resistor. Then another short orange wire coming off the resistor harness to the motor. The bottom fourth prong of the switch has a brown wire running to the fuse box. It is joined with a dark green wire (factory connector) then attaches to the fuse prong. Can't see where the dark green wire goes.

    Click image for larger version. 

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    Thanks for the diagram, it matches the others I have seen.
    Last edited by VanSandy; 01-23-2020 at 12:01 AM.

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    Heater Wiring

    Did you confirm you have continuity between both ends of EACH wire?

    With everything on check voltage.
    a) 12 V into switch
    b) 12 V out of the switch
    b) 12 V into the resistor
    c) 12 V out of the resistor at the 14 BLK/ORN wire connector.
    Last edited by gfleduc; 01-23-2020 at 02:52 PM.
    Gary
    1965 Display

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