HOW TO LOOSEN RUSTY BOLTS

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.