Somewhere in your repair process, you’ll run into a ball joint that’s stuck. It’s rusted solid, you’ve got the right tool, you’ve got the press, yet no matter what you do, the joint just won’t budge. And yes, it happens.
It happens a lot. It happen more often on older car. Here’s how to fix it: It’s not about brute force; it’s about technique.
Pulling harder on ball joint stud simply adds to the binding force; remember, it have a taper. So how do you fight this force? Change your approach.
How To Remove A Stuck Ball Joint
Understanding the Ball Joint Problem
First, break the bond of rust with heat. You don’t require an industrial set-up; a simple propane torch will do. Use the torch to apply some heat to steel knuckle surrounding the stud (don’t apply any heat to the rubber boot).
Using Heat to Break Rust Bonds
What you want is to soften the corrosion and expand the metal slighty. Once the metal heats up to glow dull red, allow it to cool for a minute before attempting to pry joint apart. Use mechanical force to crack the seal if heat isn’t effective.
Impact Technique with a Hammer
Position a punch over the ball joint stud on the back side and hit it hard with big hammer. You’re not looking to bend anything; you’re trying to bust through the rust with that shock wave. Rotate the punch each time, hitting it from various angles until you shake up the static friction.
When straight force won’t get the job done, this specific type of impact can be the ticket. If you have some time, chemical aid will do the trick as well. Use a penetrant such as Liquid Wrench or PB Blaster on the joint and allow it to soak for an hour or two (or even over night).
Applying Penetrating Oil
The penetrating oil will work its way into the tight areas, dissolving any slight corrosion and lubing the threads. And use the hammer method with it, the penetrating oil break down the surface tension so that blows make the thing move. It lasts a little longer without being harder on your body, and there is no bruising.
If all else fails, cut. With an air chisel or an angle grinder, take a chunk out of that knuckle around the ball joint stud. After cutting through steel housing, you should of be able to either pull or push on the stud and get it loose.
Cutting the Knuckle as a Last Resort
You’ll have wrecked your knuckle; time for replacement or welding this sucker back together. Messy work, but it’s about as guaranteed as you’re gonna get if the joint has locked up beyond repair. There is 3 tools for extracting a seized ball joint; Heat + Impact + Chemistry.
Summary of Removal Methods
A combination of these are required in a logical order, never brute force which just makes it worse. Apply one then change tactics with another, add penetrating oil or give it an impact. Even cut it off if that’s what you have to do to get it out.
Be patient and be prepared, and sooner rather than later it will give.