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DISCUSSION => Engine + Driveline => Topic started by: ClayW on April 21, 2013, 08:21:35 PM

Title: Are Valve Cover Bolt Threads Replaceable?
Post by: ClayW on April 21, 2013, 08:21:35 PM

Are Valve Cover Bolt Threads Replaceable?

I have some stripped threads on an M42 head. Is this sleeve replaceable?

(http://i119.photobucket.com/albums/o143/clayweiland/M42RampR009_zpsbb143902.jpg) (http://s119.photobucket.com/user/clayweiland/media/M42RampR009_zpsbb143902.jpg.html)

Title: Re: Are Valve Cover Bolt Threads Replaceable?
Post by: colin86325 on April 22, 2013, 07:45:15 AM

You are going to have to use a Timesert or a Helicoil to repair that.  Very common on the M42.

Title: Re: Are Valve Cover Bolt Threads Replaceable?
Post by: Nick_318is on April 22, 2013, 09:27:50 AM

read this, very helpful.

http://bmw.e30tuner.com/articles_vchc.php

Title: Re: Are Valve Cover Bolt Threads Replaceable?
Post by: ClayW on April 22, 2013, 08:19:35 PM

I bought a Helicoil-style thread repair kit. Drill, tap, install, done.

(http://i119.photobucket.com/albums/o143/clayweiland/1967%201600/M42004_zps5ee9d174.jpg) (http://s119.photobucket.com/user/clayweiland/media/1967%201600/M42004_zps5ee9d174.jpg.html)

(http://i119.photobucket.com/albums/o143/clayweiland/1967%201600/M42006_zps9dbf6e6a.jpg) (http://s119.photobucket.com/user/clayweiland/media/1967%201600/M42006_zps9dbf6e6a.jpg.html)

(http://i119.photobucket.com/albums/o143/clayweiland/1967%201600/M42007_zps85414a50.jpg) (http://s119.photobucket.com/user/clayweiland/media/1967%201600/M42007_zps85414a50.jpg.html)

(http://i119.photobucket.com/albums/o143/clayweiland/1967%201600/M42008_zps1dc3b748.jpg) (http://s119.photobucket.com/user/clayweiland/media/1967%201600/M42008_zps1dc3b748.jpg.html)