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Home / Answers / Hand Tools / Broken and Seized Fasteners / How does an induction heater help free seized fasteners?

How does an induction heater help free seized fasteners?

Short answer: An induction heater uses a magnetic field to heat steel fasteners quickly without an open flame, expanding the metal and breaking corrosion so the fastener can be removed.

Corroded fasteners in suspension, exhaust and engine parts often resist penetrating oil. Heat expands metal and breaks corrosion bonds. Induction heaters heat steel without an open flame, reducing risk compared with a torch.

Accessories such as coils and pads fit different jobs. Some attachments are designed for aluminum parts.

Follow the maker's safety instructions. Keep heat away from fuel lines, brake lines, wiring and rubber parts. Wear safety glasses and gloves, avoid wearing jewelry, and keep a fire extinguisher nearby.

Last reviewed 2026-11-04 · Broken and Seized Fasteners

Tools used for this job

Induction Innovations U-611 Little Al Aluminum Heating Attachment

General guidance only. Follow the vehicle and tool manufacturer's procedures, and confirm vehicle coverage on the tool maker's list before buying.