58n65

I've decided to rebuild my calipers and now I can't remove the bolts that hold the two halves together, rear calipers. I got the front calipers apart but those rear ones are frozen on.

I've tried an impact, heat, and penetrating oil (even though I'm not sure how it would penetrate). At this point I'm not sure what to do. I have the calipers just laying on the bench. So what can I do to loosen them?

Thanks,
Dex.

856666

I had the same problem and believe the cause was I could not secure the caliper from moving while on the bench

Remount them on the car and tighten the mounting bolts

Use a breaker bar to break loosen the bolts

Phil

autoalain

another tip, use the impact with the flat end attachment and use it on the caliper where the threads are, then put your tool on the bolt and use the bar, an old guy showed me this trick about 50 years ago and since then I
have NEVER snapped a bleeder, they always come out when using the impact on the side. before this I used to break many of them. I sure that vibration will help on those big bolts you are trying to loose.

58n65

Thanks Phil! That's probably what I'll do this weekend. I'm just hoping I don't snap one of those bolts off in the caliper or crack the caliper.

Thanks,
Dex.

58n65

Thank you for that suggestion! I'm assuming you mean to use the end of the impact and let it vibrate against the caliper in the area where the bolt is? That makes sense and will do that before I mount them on the car as Phil suggested. The two ideas should work!

Thanks,
Dex.

MikeM

Some hobby horse impacts don't make much torque. Use a breaker bar, six point socket and lean in to it.

Avispa

And use a strong socket, like a good quality impact socket. Sometimes the regular ones will split if they get torqued too much.

58n65

I think that's my problem. It's a cheap impact that came with my tank.

Thanks,
Dex.

58n65

Very true! I have a set of impact sockets, so I should be good.

Thanks,
Dex.

autoalain

Folks, you have the wrong idea, what I ment with the impact is NOT to lossen the bolts but use the impact as a vibrator next to the threads, the vibration really works, that is why i said use a FLAT hammer end on impact, works miracles,
trust and old guy. Mike

itsforfun

"Give me a lever long enough, and I'll move the world"

58n65

Got them broke loose and removed. I mounted them back on the car and used a short cheater bar. Came right off. I tried the flat part of the impact like suggested, but I guess I didn't do something right.

Thanks again everyone!
Dex.