BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      04-28-2019, 01:29 PM   #1
thetaobear
Private
thetaobear's Avatar
47
Rep
57
Posts

Drives: 2009 135i Crimson Red
Join Date: Jun 2013
Location: United States

iTrader: (0)

Unhappy Help! Broken N54 Valve Cover Bolt Extraction

My torque wrench failed me and broke off one of the bolts. There is not much head room for me to clamp the bolt out.

The bolt is easily accessible, but I have been trying to use 1/8 drill to drill the bolt, but the lack of precision and moving around makes it very scary (don't want to destroy the engine block).

I've been searching around- mostly found concrete answers for the aluminum bolts on the N52.

Any ideas and suggestions?

Thanks!
Attached Images
 
Appreciate 0
      04-28-2019, 09:54 PM   #2
N54Yankee
Lieutenant Colonel
N54Yankee's Avatar
United_States
2706
Rep
1,916
Posts

Drives: N54 135|Cobb|M3 control arms
Join Date: Sep 2018
Location: USA

iTrader: (0)

Years ago snapped a bolt replacing my water pump on a 5.0 Fox body. My buddy welded a bolt onto the broken bolt and extracted it. That was a steel bolt and block but maybe you can get a good TIG guy to work some Al magic. Good luck
__________________
__________________
"The Constitution was never construed to authorize Congress to infringe the just liberty of the press, or the rights of conscience; or to prevent the people of the United States, who are peaceable citizens, from keeping their own arms.” Samuel Adams
Appreciate 0
      04-28-2019, 11:23 PM   #3
vtl
Brigadier General
vtl's Avatar
Australia
1492
Rep
3,148
Posts

Drives: 2008 BMW 135i MT
Join Date: Apr 2015
Location: Melbourne, Australia

iTrader: (0)

There's a few different techniques that could be used


Use a sharp punch and punch the surface of the screw near the edge at a shallow angle, to try and reverse the screw out. Ive done this with snapped oil pan bolts before

Centre punch the hole and try to drill a small hole in there, then once the hole is started run a screw extractor on it.

(Alloy screws only) Drill hole into the screw then hammer in a torx socket in the hole, then use a ratchet to back out the screw
__________________
Appreciate 0
      04-28-2019, 11:30 PM   #4
BMWdmk
*Rollin 3rd*
BMWdmk's Avatar
United_States
106
Rep
1,232
Posts

Drives: Something fast
Join Date: Sep 2007
Location: Chino Hills

iTrader: (15)



Not my video but this is how I extract called a punch I believe. I usually do the second way smacking a good size torx bit and working it out slowly if I don't have space.

Start with method one if you have space move to torx bit if it doesn't work out. Worst case scenario heli coil. Hardest part is getting the gumps to get a drill near the head but once you're over it you realize its just another repair. Hope this helps.
Appreciate 0
      04-29-2019, 09:00 AM   #5
Thunderguts
Captain
Thunderguts's Avatar
772
Rep
992
Posts

Drives: 2009 128i Sport MT
Join Date: Jul 2018
Location: DFW

iTrader: (0)

In that situation I like the punch idea followed by a small drill bit and then a screw extractor. You might even use a hand drill to start the hole. It should be fairly easy to get out since you just had it out. Have someone stand next to you with a vacuum while you drill and take up any filings as they are produced.
Appreciate 0
      04-29-2019, 11:26 AM   #6
519.E82
Lieutenant
519.E82's Avatar
Canada
243
Rep
439
Posts

Drives: BMW 128i Sport (Non M)
Join Date: Apr 2016
Location: Ontario, Canada

iTrader: (0)

Ah a lucky one. I would recommend the left hand drill bits if you can find them.
__________________
2008 SGM 128i - 3 Stage IM - 130i Tune - Dinan Camber Plates - BMW PE - Injen Intake - 1M Mirrors - LCI Blacklines - M4 Spoiler - Blacked 263's - Aero Bumper - Aero Side Skirts - OMGSplitter - AFE Intake Scoops
Appreciate 0
      04-29-2019, 06:09 PM   #7
fredy
Private First Class
14
Rep
100
Posts

Drives: 135i
Join Date: Sep 2010
Location: canada

iTrader: (0)

Do you heat them with a torch?
Appreciate 0
      05-03-2019, 09:46 AM   #8
highbrowed
Boost Addict
highbrowed's Avatar
335
Rep
1,244
Posts

Drives: 135i 6MT w/ N54 Delete
Join Date: Jul 2014
Location: South Florida

iTrader: (4)

I did this same thing exactly. Got it out using a sharpened screw driver and a ball peen hammer, took me about 30 seconds.

https://www.1addicts.com/forums/show....php?t=1493684
Appreciate 0
      05-08-2019, 02:40 AM   #9
thetaobear
Private
thetaobear's Avatar
47
Rep
57
Posts

Drives: 2009 135i Crimson Red
Join Date: Jun 2013
Location: United States

iTrader: (0)

Thank you guys! Turns out one of the bolts need to be drilled out, and the other need to be time-serted.

This is some scary stuff.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 10:35 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST