EATON Detroit Spring

The leading manufacturer of leaf and coil springs for the street rod and restoration automotive industries

We Help Maintain American Icons by Manufacturing Leaf and Coil Springs Right Here in America

Phone: 1 (313) 963-3839
Fax: 1 (313) 963-7047

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      We have been manufacturing springs for American vehicles for over 80 years. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge.

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MENUMENU
  • Home
  • Products
    • Suspension Parts
      • Leaf Springs
      • Coil Springs
      • Shocks
      • Attaching Parts And Hardware
      • Installation Kits
      • Leaf Spring Shackle Replacement Kits & Parts
    • Street Rod Suspension Parts
      • Mustang II Front End Springs
      • 48 Inch Truck Springs
    • Allstate - Chrysler
      • Allstate
      • American Motors
      • Bricklin
      • Buick
      • Cadillac
      • Chevrolet
      • Chevrolet Truck
      • Chrysler
    • Daimler - Ford
      • Daimler
      • DeSoto
      • Dodge
      • Dodge Truck
      • Edsel
      • Ford
      • Ford Truck
    • GMC - Jeep
      • GMC
      • Honda
      • Hudson
      • Hudson Truck
      • Hummer
      • International
      • Jeep
    • Kaiser Darrin - Nissan
      • Kaiser Darrin
      • Kaiser-Frazer
      • LaSalle
      • Lincoln
      • MAHINDRA
      • Mercury
      • MG
      • Nash
      • Nissan
    • Oldsmobile - Rambler
      • Oldsmobile
      • Plymouth
      • Plymouth Truck
      • Pontiac
      • Rambler
    • Sterling - Willys
      • Sterling
      • Studebaker
      • Studebaker Truck
      • Toyota
      • Willys
    • Request A Custom Quote
    • Search For Parts Here
  • Spring Tech
    • Learn About Leaf & Coil Springs
      • Spring Tech Articles
      • Tech Questions
      • Spring Tech Videos
      • Featured Elsewhere
      • EATON Detroit Spring Podcast
      • Buy Ford Manuals
    • Spring Tech 101

      We have been manufacturing springs for American vehicles for over 80 years. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge.

      Browse our many articles, watch videos produced in partnership with AutoRestoMod, and learn all about your spring suspension here.

    • Browse By Topic
      • Leaf Springs
      • Coil Springs
      • Attaching Parts
      • Ride Height & Stance
      • Ride Quality
      • Manufacturing Springs
      • Replacing Springs
      • Modifying Springs
      • Ordering Springs
  • About Us
    • About EATON Detroit Spring
    • Customer Showcase
    • Send Us Photos Of Your Ride!
    • Free Stuff For Car Shows!
    • Facebook
    • YouTube Channel
      • Spring Tech Videos
  • Order Here
    • Lookup & Purchase Your Vehicle's Parts
    • Request A Quote
    • Email Our Sales Team
    • Dealer Information
  • Find Parts That Fit Your Vehicle
  • Click to Call Now: 1 (313) 963-3839

Are Welded Coil Springs Salvageable In Any Way?

Q -Spring Guru!

I have a 1955 Buick Roadmaster sitting on a 1988 Chevy Caprice classic chassis. The right side sits 1 1/2″ lower than the left. On inspection I can see the springs have been welded to the lower perch. I have a feeling the character who did this weakened the spring when he/she put the stick to it. I do not know if they’ve been cut.

So what should I do here, cut out the left side ship it and let you match it up, or give you additional info and you can do something with that? Or, should I just put a donut on the right spring and forget about it, (not really my way to fix things)? The left side sits at a good height with no danger of tire rub. – Dennis

A – Dennis,

No matter how long I have been at this, I am still amazed as to what people will do while building a car. Many of the things I see show just how ingenious people can be. Then there are the things done which continue to prove mankind is still just one step above being an animal. Welding any spring, coil or leaf or torsion bar, fits this category.

I am sure the character who did this figured he had his reasons for welding the spring to the seat and probably believes he was one of the best engineers in the ‘hood.

During the welding process steel is heated to the melting point and the steel in the pieces being welded flow together. The welding rod or stick is used to create the electrical arc and to replace the steel which is lost and to add extra material to create a larger bonding area. Welding is a perfect way to bond low carbon steel. (we aren’t talking about aluminum or special welding techniques, this conversation is limited to spring steel)

However, High Alloy spring steel does not react kindly to the excess heat generated in the welding process. The high heat causes spring steel to de-carbonized and to become brittle. The de-carbonization generally occurs in the section right next to the welded area. The weld may not break but I assure you the section of the spring right next to the weld will break.

In fact, simply striking an arc on a spring will create a de-carbonized area which will cause a failure to occur at that point.

Something everyone must simply burn into their brains is to –

NEVER, NEVER, EVER WELD ANY SPRING

As you have correctly guessed another sad result is that the heating process also weakens the spring beyond the area next to the weld. In order for spring steel to become a spring the steel must be heated and cooled and then reheated in a controlled process. Once the steel has been tempered, heating it above 400 degrees will cause the spring to anneal and the spring will no longer support weight.

Springs are part of a vehicles suspension and the suspension is part of the components which attaches the wheels and axles to the vehicle. You never want to do anything which jeopardizes the integrity of any suspension part. Heat and welding on any suspension part can be harmful and must be avoided.

Now Dennis what you need to do is get those welded springs off your car and throw them away. Both ends of the rear springs off an ’88 Caprice were pigtailed, that is the end coils have a smaller diameter then the body of the spring, and the free height, out of the car with no weight on it, is around 17-1/2 Inches for the Sedan and 14-1/2 for the wagon.

Take off the good spring and measure it’s length, let me know your findings and we will set you up with the correct springs.

Also figure out why the springs were welded to the perch and fix it so they sit on the perch like they should.

Filed Under: Tech Question Tagged With: Coil Springs, Modifying Springs, Ordering Springs, Spring Troubleshooting

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OEM Replacement & Custom Springs

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EATON Detroit Spring, Inc.
1555 Michigan Avenue
Detroit, MI 48216
Phone: 1 (313) 963-3839
Fax: 1 (313) 963-7047
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