Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management

LinkBack Thread Tools Display Modes
Old 01-07-2019, 08:35 PM
Premier Member
Join Date: Jun 2018
Location: SF
Posts: 27
johngrefe is on a distinguished road
N62 Broken Valve cover bolt in Rear

  • Harbor Freight 3/8 Drive air drill (reversable)
  • Small hammer
  • Auto Punch (spring loaded)
  • WD40
  • Wratchet
  • Extensions
  • Telescoping magnet (stronger the better)
  • T10 & T15 Tox bit
  • *or*
  • Fastenal left handed drill bit

This is a quick note if anyone else runs into this.

Remove plastic sub assembly that keeps cabin air filter slid up. I'd actually recommend this for anytime you service the valve covers, really opens space up, makes clearance on cam sensor much better.

Harbor Freight has an excellent 3/8 drive air reversable 90d drill. It's just small enough to give you two fingers behind it and hit the stud at a straight.

Get an auto punch tool to divet the center of the stud.

Pack area with rags, leaving no gaps, cover cams / cam towers / valves and oil gullies

Spray area with WD40 or equiv to catch shavings in oil while drilling / soak your bad stud.

Drill using cobalt bits, work from smallest up.

Drill slowly, in small bursts, try to keep bit centered, or work the hole towards the center. Don't touch the sides.

Working slowly, pull the bit every drill, and use a magnet to clean up shavings. The bolt is steel and the heads aluminum so this works easy.

Two directions here:

A) Use a high quality reverse (left handed) drill bit on the above drill to spin it out. You have to be dead nuts centered with your above pilot hole, and high confidence in your angle of attack.

B) (my choice) In the small hole you've made hammer in a Torx 15 socket into the hole until firm, use extensions and wratchet to get a very good angle and slowly apply pressure until it comes free. I prefer this, because the head is at an askew angle, the work space is tight, and the larger you make the hold, the higher your chances of hitting the cylinder head sleeve / threads, which is an 'engine out'.

I know there is a 1000 write ups across the web for tackling sheered valve cover bolts, but I'd figure I'd make this note as it is X53/N62 specific process, and you are working with tight clearances and odd angles.
Reply With Quote

Sponsored Links



Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 12:51 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.