1969 buick wildcat coil getting hot

Discussion in 'Buick FAQ' started by Karma, Jun 18, 2023.

  1. Karma

    Karma Well-Known Member

    I just got my wildcat wired up and cranking but i noticed my coil is getting really hot just in a few minutes. Not sure why or if thats normal
     
  2. pbr400

    pbr400 68GS400

    Do you have a factory resistance wire from the switch to the coil? It should be, I think, black and pink, and step the running voltage down to +-9 volts. (You crank on 12 volts from the starter but run on less). If a previous mechanic ran non-resistor wire from the switch to the coil, you’ll need a ballast resistor (like Mopars) in the line to step down the voltage. If you don’t, the coil will last 30 days and fail with the bottom pooched out. Ask me how I know! (I don’t know if that makes it hot while It’s dying but I’d think it would).
    Patrick
     
    Last edited: Jun 19, 2023
  3. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    Coils will heat up a bit naturally.
     
  4. Karma

    Karma Well-Known Member

    So I'd say not. The wire is red maybe im color blind. That wire is tapped right to the yellow wire which is hooked up to the starter as the picture. Note is possible i got the yellow and blueish wire backward but car runs so i doubt it? Also that's a older picture before i connected the battery which is connected right with that red wire on the solenoid 20230618_221813.jpg Resized_20230617_161003.jpeg
     
  5. pbr400

    pbr400 68GS400

    Last edited: Jun 19, 2023
  6. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    The cloth covered wire is the resistance wire.
     
  7. Karma

    Karma Well-Known Member

    Alright so whats my fix here?
     
  8. Karma

    Karma Well-Known Member

    Alright soo if i take the yellow wire off the starter where would it go?
     
  9. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    What are you trying to fix? I don't see a problem except that you're asking why your coil is getting hot. It will be hot to the touch normally. Shouldn't fry an egg, but it will be pretty warm.
     
  10. pbr400

    pbr400 68GS400

    You need to check your voltage to the coil with the switch ‘on’. If it’s 12 or more volts that might be causing your heat. The wires you show to and from the starter don’t supply power during ‘run’.
    Patrick
     
    Last edited: Jun 19, 2023
  11. Quick Buick

    Quick Buick Arlington Wa

    Honestly just what is really Hot.....

    Coffee cup hot?= With hot coffee in it of course..
    Radiator hot? = With engine at operation temp... In other words running at least 45min....
    Exhaust manifold hot= Same as above...

    Do you have a infrared temp gun?
     
    Max Damage and john.schaefer77 like this.
  12. Karma

    Karma Well-Known Member

    Hot enough to burn you if u held your hand there
     
  13. Quick Buick

    Quick Buick Arlington Wa

    Just for starters the coil could just be shot....

    With the key on (NO MOTOR RUNNING). what's your voltage on the pos + of the coil.... Should be about 9ISH...

    Ohm read your coil.... Lots of info on the web,,, YouTube,, on testing coils...
     
  14. Quick Buick

    Quick Buick Arlington Wa

    Has your dist been converted over to electronic????? Are you still points?
     
  15. Karma

    Karma Well-Known Member

    Still points
     
  16. Quick Buick

    Quick Buick Arlington Wa

    OK. Refer to post #13
     
  17. Quick Buick

    Quick Buick Arlington Wa

    In the mean you need to check your plugs, wires, cap, rotor, points, ( gap & dwell ) condenser.....

    I've heard a sloppy timing chain can mess with the ignition...
     
  18. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

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