Skip to content
View in the app

A better way to browse. Learn more.

Ultimate Subaru Message Board

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Replacing rusty control arm (minor trouble)

Featured Replies

I had a control arm rust up and break. No big deal, no one was hurt and the car made it home fine. I got a replacement on pretty quickly. Trouble is, I can't get the bolts out of the car to get the old one off. I have a pretty long breaker, an impact gun and I've even put heat on them. Has anyone else run into this?

Next step is a long pipe on the breaker I guess.

those are some long 17mm or 19mm bolts, you need a cheater pipe on a breaker bar.

Yep bigger impact or longer breaker bar would be best.

 

Soaking in penetrant and heat will help.

 

Problems might just be starting for you though. There's a chance of the bolt shearing off. And then once the nut is off the bolt probably won't come out of the control arm, they like to seize in place.

 

Good luck.

you are talking about the 2 bolts going up into the frame? The captive nut is not accessible. Those are hardened bolts, possible to shear but if you go carefully they will thread out, lots of fine threads on those long bolts.

All of the bolts on the rear bushing for the control arm are ungodly tight for some reason. Makes no sense because the manual says they should be torqued to something like 65ft lbs. I guess because they aren't generally a part that gets removed, they seize up, but the best way is with a big impact wrench. If you don't have one, constant pressure applied with a breaker bar and cheater pipe and have a friend or helper whack the bar down near the bolt with a BFH.

Rustaru...

 

I agree with using an air impact, if you have good air pressure and a nice impact, otherwise a 3' breaker with a pipe added. Last weekend removing and installing my new 2004 trans in my 1999, I had a few stubborn bolts/nuts.

 

First though I would soak those bolts and area with some penetrate. I have NEVER broken a bold off using:

 

wurth_odrdzewiacz_rost_off_s.jpg

 

but there are others like AeroKroil, etc... Now before I do any repair I usually try to spray the night before and day of in helping ease those rusty parts...

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.