Front Brake Calliper 18mm bolts stuck
Thread Starter
Newbie
Joined: Oct 2015
Posts: 5
Likes: 0
2011 E550
Front Brake Calliper 18mm bolts stuck
While replacing the Front Brake rotors, I am running into the problem that the 2 18mm bolts on both the left and front wheels are so tight that I could not manage to open them.
I put WD40 on the bolts but after 30 mins they still wouldn't budge.
Any ideas?
I put WD40 on the bolts but after 30 mins they still wouldn't budge.
Any ideas?
Member
Joined: Aug 2014
Posts: 77
Likes: 15
2009 Subaru WRX, 2011 E550
bolts
Those are a real bear!! I feel your pain. I was all set to use my impact driver but, did not have a 18mm 1/2" drive?!?!? WTF!!
Anyways... I turned the wheel for better access and got a longer breaker bar on them and they finally loosened up. I did have a few sore muscles after and I do own the approiate impact socket now.
Anyways... I turned the wheel for better access and got a longer breaker bar on them and they finally loosened up. I did have a few sore muscles after and I do own the approiate impact socket now.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 1,084
Likes: 68
From: Athens, GA USA
2011 E63, 2011 Hyundai Genesis 4.6 v8, 2013 GMC Denali XL, 1965 Ford Mustang, 2005 Merc. E500
I use PB Blaster (rust blaster) instead of wd40. I have better luck with it on breaking bolts loose.
Junior Member
Joined: Oct 2014
Posts: 53
Likes: 8
From: Toledo, Ohio
2010 E350 4Matic
Bolts stuck
Use a little heat on the head of the bolt, let it set a minute for the heat to penetrate and should have no problems. just don't touch it bare handed while disassembling. 
Super Member
Joined: Sep 2015
Posts: 639
Likes: 36
From: Cleveland OHIO
01 ML55AMG 04 ML500 03 ML350 08 ML63AMG
Just did my brakes, when i worked on the right side i turned the wheel to the left for better access and used the extension for more leverage. BTW my rears were pain in the neck rotors didn't want to come off. make sure when you put new ones on put some antysease for next time
MBWorld Fanatic!
Joined: Dec 2011
Posts: 1,273
Likes: 129
From: Orlando, FL
2015 GL550 4matic
Turn the wheels with caliper out and use a long breaker, like 2ft long. That will bust loose pretty much anything with ease.
http://www.harborfreight.com/12-in-d...bar-67933.html
http://www.harborfreight.com/12-in-d...bar-67933.html
