1970 Horn Relay Restoration

Discussion in 'Original Drivetrain Topic' started by bkmont, Mar 23, 2019.

  1. Jim Streib

    Jim Streib https://www.flickr.com/photos/[email protected]/albums

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    Did you soak the whole relay or just part of it ?. Could you also post a larger picture of the relay ?. From what I can see with the smaller picture above is that it cleaned the topside pretty well by the contact points.

    Jim
     
  2. bkmont

    bkmont Veteran Member

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    I used a brush to manually remove the loose rust. I filled a small mason jar with Evaporust and let the relay sit overnight. Rinsed it well with water and let it air dry.
    I didn't take anymore pictures. The relay is back in the car.
     
    Last edited: Apr 9, 2019
  3. bkmont

    bkmont Veteran Member

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    It's advertised as being safe on aluminum, copper, brass, rubber, plastic, clothing and glass. That's why I took the plunge with my relay.
    I'll do a soak test on a piece of scrap aluminum.
     
  4. bkmont

    bkmont Veteran Member

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    I think one of the maintenance shops where I work has an ultra sonic cleaner. I'll inquire.
     
    Last edited: Mar 29, 2019
  5. Jim Streib

    Jim Streib https://www.flickr.com/photos/[email protected]/albums

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    I was just wondering if just the topside got immersed or the whole thing. From what I could see of the small picture the flat headed screws as well as what they thread into, the squared off U shaped washers, as well as the one the vertical rod, is they just didn't look as clean as the topside of the relay with the contact points, pivoting contact arm, and the wire and terminal going to the topside of the relay off of the base. The topside to me looks like new and I can say WOW.

    [​IMG]

    I've used chemicals before to take or rust and it looks like what you used worked well.

    Jim
     
  6. Revin

    Revin Veteran Member

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    ultra sonic cleaner
    I tried it but not much better than just soaking. BUT I was scared (first time to use it) and had more water than evaporust:confused: soak for 30 min.with heat
    OR the parts were not as rusty as I thought. haha
    I should try again straight.....and in the cleaner as well.:p
     
  7. Peter Wilson

    Peter Wilson Veteran Member

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    Hmmm ..... Seems kinda labour intensive . I just replaced mine with a new one . I bought it NOS on Ebay for 32 bucks . kicked my rear cause I saw another one come up a couple days later for 28
     
  8. bkmont

    bkmont Veteran Member

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    Well guys reporting back on my experiment with getting my high note horn to work by soaking it overnight with Evaporust.

    I'm not advocating for anyone to try this - IT WORKED FOR ME! Yippee!
    It might not work for you. Boooo!


    After trying several things to make sure the high note horn would not blow such as swapping connections with the low note horn. The low note horn would blow with the single wire hook-up and the double wire hook-up. The high note wouldn't work in either location. Made sure the high note horn connector was good and clean. I even tapped on the high note horn with my dead blow hammer while wife pressed the horn button -nada.

    I put the horn in my vice with the opening up and level. I have one of those Stanley multi position vices.
    Poured in the Evaporust and let sit overnight.
    Emptied the Evaporust out the next morning.
    Put the horn in my garage sink and ran water through it for several hours.
    Emptied the water as much as I could by shaking and rolling around.
    Put the horn back in my vice and used a hot air gun on low setting to help evaporate the water.
    Let it sit the rest of the day while I worked on another home project.
    8 hours later blew the horn out with my air compressor.
    I didn't hear any water rattling around so I installed the horn.
    Crossed my fingers and pressed the horn shroud - both horns blew.
    The end.
    Bryan
     
  9. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    Was it identical to your original? I thought there were some differences in replacement NOS relays?
     

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