Best Impact Wrench for Suspension Work? DIY Guy Needs Advice

Hey everyone, I'm about to replace the struts and control arms on my 2012 Civic. I've got a decent set of hand tools but no impact wrench. I'm looking at either a cordless electric or a pneumatic one. I have a 20-gallon compressor that puts out about 5 CFM at 90 PSI. Would that be enough for a pneumatic impact? Or should I just go electric? I don't want to break the bank but I also don't want to struggle with rusted bolts. Any recommendations? Thanks!

Hey Dan, for suspension work you'll want at least 400 ft-lbs of torque. That 20-gallon compressor might struggle with a pneumatic impact—most need 4-5 CFM at 90 PSI, but the torque drops if the tank can't keep up. I'd honestly go with a cordless electric like the Milwaukee M18 Fuel mid-torque. It's a beast and you won't have to deal with air hoses. Plus, you can use it anywhere. Just my 2 cents.

I second the electric route. I've got a DeWalt 20V Max XR impact and it's handled everything on my truck, including rusty suspension bolts. The only downside is the price, but it's worth it. If you're on a budget, check out the Ryobi one+ impact. It's not as powerful but might do the job for occasional DIY. Also, soak those bolts in PB Blaster the night before—makes a huge difference!

I'm a Milwaukee guy through and through, so I'd say go red or go home. The M18 Fuel mid-torque is perfect for automotive. But if you already have other batteries, stick with that brand. No sense in buying into a new system. I've had my M18 for 5 years and it's still going strong. Just make sure you get impact-rated sockets, or you'll crack your chrome ones.

Safety first! Whatever you get, always wear safety glasses and gloves when using an impact wrench. Those sockets can shatter. Also, make sure you're using the right size socket—a loose fit can strip the bolt head. And don't forget to use jack stands, never rely on a jack alone. As for the tool, I agree with the others: cordless electric is more convenient for DIY. But if you go pneumatic, get an impact with a high torque rating and make sure your compressor can keep up. 5 CFM is borderline; you might need a bigger tank. Stay safe!