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How Do You Loosen Stuck Muffler Bolts?

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The constant heat, vibration and moisture of a car's exhaust system means that there is a good chance that the bolts that mount the muffler to the rest of the exhaust system will become stuck. It is quite rare for muffler bolts to be removed easily. There are several tips and tricks you can use to remove muffler bolts before you have to resort to cutting them with a hacksaw. Step 1 Spray the muffler bolts with a penetrating lubricant before you begin working. Soak them thoroughly and give them a few good hard taps to allow the lubricant to begin working its way in. Let the lubricant work for several hours, if possible. You can even leave it overnight. Step 2 Try leverage first. If you stabilize the bolt very firmly, such as by wedging a tight-fitting crow's foot wrench against the bottom of the car, you may be able to get a lot of force onto the stuck muffler bolt by using a breaker bar. Use a tight-fitting socket or crow's-foot wrench to avoid stripping the bolt or nut. Step 3 ... more
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