Stripped a coil pack torx bolt on an M157, Need some advice on how to remove
Thread Starter
Junior Member
Joined: Apr 2019
Posts: 27
Likes: 19
G63
Stripped a coil pack torx bolt on an M157, Need some advice on how to remove
God damnit...
Long story short, I was performing a spark plug change on my 2016 G63, and I stripped one of the bolts on my one of my coil packs. The original bolt accepts a 8mm torx socket, but the edges of the bolt are stripped to the point where it's smooth. Ironically, seven of the plugs are changed and the second bolt on the coil pack is question comes out, but this one bolt is stripped.
Does anyone have any advice on how I can remove a stripped bolt? FWIW, this looks like an aluminum torx bolt and I have to imagine there is some corrosion somewhere on the bolt.
Secondly, does anyone know what bolt the coil packs use on the M157? I can't find any information anywhere online but taking some measurements yield somewhere around a 6-1x25 torx bolt.
Long story short, I was performing a spark plug change on my 2016 G63, and I stripped one of the bolts on my one of my coil packs. The original bolt accepts a 8mm torx socket, but the edges of the bolt are stripped to the point where it's smooth. Ironically, seven of the plugs are changed and the second bolt on the coil pack is question comes out, but this one bolt is stripped.
Does anyone have any advice on how I can remove a stripped bolt? FWIW, this looks like an aluminum torx bolt and I have to imagine there is some corrosion somewhere on the bolt.
Secondly, does anyone know what bolt the coil packs use on the M157? I can't find any information anywhere online but taking some measurements yield somewhere around a 6-1x25 torx bolt.
MBWorld Fanatic!
Joined: Jun 2020
Posts: 1,177
Likes: 314
2006 CLS55 AMG, 2005 SLK 350 AMG
God damnit...
Long story short, I was performing a spark plug change on my 2016 G63, and I stripped one of the bolts on my one of my coil packs. The original bolt accepts a 8mm torx socket, but the edges of the bolt are stripped to the point where it's smooth. Ironically, seven of the plugs are changed and the second bolt on the coil pack is question comes out, but this one bolt is stripped.
Does anyone have any advice on how I can remove a stripped bolt? FWIW, this looks like an aluminum torx bolt and I have to imagine there is some corrosion somewhere on the bolt.
Secondly, does anyone know what bolt the coil packs use on the M157? I can't find any information anywhere online but taking some measurements yield somewhere around a 6-1x25 torx bolt.
Long story short, I was performing a spark plug change on my 2016 G63, and I stripped one of the bolts on my one of my coil packs. The original bolt accepts a 8mm torx socket, but the edges of the bolt are stripped to the point where it's smooth. Ironically, seven of the plugs are changed and the second bolt on the coil pack is question comes out, but this one bolt is stripped.
Does anyone have any advice on how I can remove a stripped bolt? FWIW, this looks like an aluminum torx bolt and I have to imagine there is some corrosion somewhere on the bolt.
Secondly, does anyone know what bolt the coil packs use on the M157? I can't find any information anywhere online but taking some measurements yield somewhere around a 6-1x25 torx bolt.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
Do you have anything left of the bolt to grab hold of? Use needle nose vise grips, clamp them absolutely as tight as possible on the stripped bolt, and start turning. Replace the stripped bolt, obviously. It would be good practice to replace all of the bolts. Cheap insurance, especially as a percentage of the value of a G63.
Thread Starter
Junior Member
Joined: Apr 2019
Posts: 27
Likes: 19
G63
Do you have anything left of the bolt to grab hold of? Use needle nose vise grips, clamp them absolutely as tight as possible on the stripped bolt, and start turning. Replace the stripped bolt, obviously. It would be good practice to replace all of the bolts. Cheap insurance, especially as a percentage of the value of a G63.
As a last resort last night, I tried using a dremel to cut a line down the middle of bolt to fit a screwdriver, but the problem is the fit is so tight the line is at a slight vertical angle and doesn't fully seat the screwdriver.
Junior Member
Joined: Dec 2010
Posts: 22
Likes: 4
From: Virginia
'85 380SL, '10 E350, '16 GL450
You should be able to drill a small hole in the center of the bolt and use a small "easy out" to extract the bolt. I've done it many time on other types of bolts. An aluminum bolt should be easy to use this method.
