Repair Tech
[auto repair] Rusted exhaust bolts — heat vs cut strategy?
Hey everyone, I'm dealing with rusted exhaust bolts on a 2010 Honda Accord in my shop. I've tried soaking them with penetrating oil overnight, but I'm wondering if I should go the route of heating them up with a torch or if it's better to just cut them off and replace them. My main concern is not damaging the surrounding components and ensuring a smooth workflow since we have a tight schedule this week. What strategies have worked for you in the past?
2 Answers
I've faced this issue many times, and I've found that using heat often works best. Applying a propane torch to the bolt for a short time can help break the rust's bond. Just be cautious of any nearby plastic components. After heating, I usually apply more penetrating oil, let it sit for a few minutes, and then use a quality socket to turn it. If it snaps, then you're looking at the cutting strategy, but that can lead to a more time-consuming fix. Also, consider that some parts vendors offer a set of replacement bolts that may save you time if you're worried about damaging the originals. Good luck!
I've had success cutting the bolts off, but it can be a hassle. If you choose to cut, you’ll want to use a reciprocating saw or angle grinder, and be mindful of the metal shavings. You can always use a thread repair kit afterward if the threads get damaged. I've found that the pricing for replacement bolts varies, so check with your local suppliers or online. Don’t forget to update your shop management software to log the time spent on this job; it helps keep track of jobs that take longer than expected.