Removing rusty bolts is a frustrating experience. Forcing a bolt or hitting it too hard often results in a broken bolt that requires more work to remove. The job may be easier if you choose the right tools. An open-end lady or six-point box lock is recommended by Popular Mechanics. A thick layer of rust and corrosion can make it difficult to find a wrench that fits perfectly. Experiment with measuring tools
Scrub as much rust off the bolts and nuts as possible with a stiff wire brush. Tap the nut lightly on the flat side with a hammer. Place the wrench over the nut and turn it slightly to the right before turning it to the left.
Saturate bolts with rust remover or lubricant such as all-purpose household spray lubricant. Let the rust remover set for at least an hour then scrub the bolts and nuts with the wire brush again. Tap the nut with a hammer and test for looseness. Repeat the lubricant application several times. If there is a thick build-up of corrosion on the assembly, let it soak on the rusted bolts overnight.
Put ice on the metal bolt to make the metal contract. Heat the nut with the flame of a lighter or smaller torch. The heat will make the beans expand. With the bolt tightened and the nut extended, you should be able to loosen the bolt with a wrench.
Apply more leverage to stubborn bolts by using a long handled ratchet or break bar. Stop using the ratchet if the tension loosens or feels soft. This is a sign that you are peeling bolt threads.
What You Need
- Wire bristle brush
- Hammer
- Key
- household lubricant
- Lighter
- Long ratchet handled
Tips
- Remember the adage “really tight, left-handed” when trying to loosen a rusty bolt. Cranking your wrench to the right will only tighten the bolt further; however, turning right before turning left can help loosen stuck bolts or screws.
- It may take several applications per step to free very rusty bolts. Spray grease on the bolts and take a break if you get frustrated.
WARNING
- Do not use fire to heat a rusty nut if there is a combustible material nearby, such as oil or gasoline in a car engine.