XK8 / XKR ( X100 ) 1996 - 2006

Can't remove Coil

 
  #1  
Old 06-10-2019, 10:45 AM
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Default Can't remove Coil

Attempted to remove Coil. Bolt is just spinning without coming out. I would guess the Brass Fitting it screws into has come free and turning with the Bolt. Anyone have a trick in removing bolt? Once I get it out what's the best way to secure to the Brass Fitting?
Thanks for any help.
 
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Old 06-10-2019, 10:48 AM
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if the bolt is just spinning - can you just lift the coil out? If so - then look for a high-heat epoxy to secure the fitting.
 
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Old 06-10-2019, 10:54 AM
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Coil won't come out. I tried pulling on bolt with vise grips but it doesn't come out. Since I was going to change the coil I thinking about breaking the plastic around the bolt and removing Coil. Hopefully after that I can pull the bolt out unless someone has a better idea.
 
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Old 06-10-2019, 11:01 AM
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Bob - if replacing the coil - then breaking coil plastic would be my next suggestion

while you are in there - check the cable harness to the coils for failed insulation!!! I had several spots where the insulation had come off the wiring and was shorting out causing misfire/lean codes. Short term fix was to wrap each wire with electrical tape until I can replace the harness
 
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Old 06-10-2019, 03:13 PM
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Random breakfast-coffee-induced thought: could you remove the cam cover itself with the coil in place then attack the spinning bolt from the underside of the cam cover? I’m half way through replacing my secondary cam chain tensioners and have my cam covers off. The pics show the two offset half-round plastic ‘lugs’ that house the embedded threaded inserts that the coil bolts screw into. My first thought would be to drill a small hole from the underside of the lug to meet the metal insert, drill a small way into the insert then stick a small metal pin/rod through the hole to stop the insert spinning. Epoxy the pin in place. My humble $0.02c. Gaz.







 

Last edited by Ghazzah69; 06-10-2019 at 03:35 PM.
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Old 06-11-2019, 01:59 PM
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Thanks for the suggestion but I'm not sure that I like the idea of drilling into underside of Cam Cover. Still thinking about what to do. I have another problem that I am working on first.
 
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Old 06-11-2019, 03:07 PM
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I had this issue with one of the coil cover bolts. I spun the bolt with a socket while pulling the coil cover gently away from the cam cover. The brass ferrule the bolt screws into is serrated on the outside so it wil eventually grind its way out.

The serrations also make a good gripping surface for separating the bolt from the ferrule, and for bonding the latter back into the cam cover. JB Weld (amazingly sourced locally) is up to the temps and has proven to be a good fix.

HTH
 
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Old 06-13-2019, 11:46 AM
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Originally Posted by bobhoff View Post
Coil won't come out. I tried pulling on bolt with vise grips but it doesn't come out. Since I was going to change the coil I thinking about breaking the plastic around the bolt and removing Coil. Hopefully after that I can pull the bolt out unless someone has a better idea.
This happened to me 3 times. Drives me crazy. Happens when you over tighten the bolt.

I tried everything you mentioned and a few others. Best solution for me was using a mini die grinder with a diamond cutting wheel on it to cut the head of the bolt off. Took a while, but i was able to get the coil out without destroying it or the valvecover.
 
 
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