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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 01-24-2012, 02:47 PM
stilover stilover is offline
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Location: Manchester, CT
 
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Mein Auto: 2000 323i
valve cover gasket-ooops

While re-installing my valve cover I accidently broke the bolt that is in the middle of the cover closest to the firewall. The bolt that the ground wire hooks onto and attaches to the last coil closest to the firewall. i'm thinking about j.b welding it just so i have a place to hook the ground wire to. Will this cause leakage in the spark plug cylinder? What are my options at this point? Is it possible to replace the bolt? Any help would be appreciated.
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  #2  
Old 01-24-2012, 06:17 PM
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G. P. Burdell G. P. Burdell is offline
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If you broke the valve cover stud above the hex "nut" portion in the middle of the stud, then you should be able to back it out of the head with a 10mm socket and then install a new one.

The valve cover nuts don't require a lot of torque. When they bottom out, you're almost at the specified value.
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  #3  
Old 01-24-2012, 06:18 PM
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SJBimmer SJBimmer is offline
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JB weld will probably not hold in this application. Just replace the bolt.
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  #4  
Old 01-24-2012, 07:18 PM
QAfred QAfred is offline
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Quote:
Originally Posted by stilover View Post
While re-installing my valve cover I accidently broke the bolt that is in the middle of the cover closest to the firewall. The bolt that the ground wire hooks onto and attaches to the last coil closest to the firewall. i'm thinking about j.b welding it just so i have a place to hook the ground wire to. Will this cause leakage in the spark plug cylinder? What are my options at this point? Is it possible to replace the bolt? Any help would be appreciated.
I have the same car. If my memory serves me we have a 10MM bolt that secures our ground straps....from your post I assume you mean you overtightened the bolt and broke the head off and now you have the shank of the bolt stuck in the hole.

You need to find a way to drill down the middle of the shank of that bolt using a cobalt drill bit. Then insert an easy out and back the bolt out.

If you cannot do that, find a temporary way to ground your ignition coils - extend the strap if you have to in order to find a way to secure that strap to ground securely. There are enough nuts in the area where you could easily run a jumper wire to one of them- until you find someone that knows how to extract a broken bolt stud.
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  #5  
Old 01-24-2012, 10:21 PM
stilover stilover is offline
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Does anyone know if the stud is fixed? or can it just be backed out? I found this online so i'm hoping the broken bolt can just be backed out...

http://www.ecstuning.com/BMW-E46-323..._Stud/ES18233/
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  #6  
Old 01-25-2012, 11:57 AM
stilover stilover is offline
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easy fix 85 cents! parts in the mail!
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  #7  
Old 01-25-2012, 07:13 PM
Tech Savvy Tech Savvy is offline
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it can be backed out but very tough. Place a couple magnets around the area to provide prevention of accidental damage in the future. good luck.
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  #8  
Old 04-28-2014, 07:19 AM
JustinsE46 JustinsE46 is offline
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Broken stud

Quote:
Originally Posted by stilover View Post
easy fix 85 cents! parts in the mail!
Where did you buy this http://www.bmwpartsweb.com/Part-Numb...7-51d2d65878d2 for only 85cents ? And also how difficult is drilling the old stud out from the cylinder please someone help thanks
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  #9  
Old 01-24-2015, 03:29 PM
baomamd baomamd is offline
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Location: Texas, USA
 
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I replaced two studs today. Both were overtighten (before I knew beter..). GOOD NEWS: you do not have to remove valve cover. 10mm socket (with thin wall - cheap ones usually have thin walls) can fit into the hole and you can remove the broken studs.

In fact the job was so easy, I am thinking to replace all the studs (since I was thinking tighter the better ....).
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