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Coil stud broke

Tiny
ANDREW MOORE
  • MEMBER
  • 2007 DODGE DURANGO
  • 4.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 218,000 MILES
One of my coil studs was loose and I over tightened it and pop not the bolt goes in and out and around, but will not come out.
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Tuesday, August 20th, 2019 AT 12:42 PM

8 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi Andrew,

These are not meant to come out. You broke it loose from the intake manifold. I have not seen one broken like this but as long as the nut that holds the coil to the intake manifold secures the coil in place then you will be fine. These studs are molded into the intake so the only way I know to fix it is to replace the intake.

Let me know if you have more questions. Thanks
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Tuesday, August 20th, 2019 AT 4:39 PM
Tiny
STEVE W.
  • MECHANIC
  • 12,950 POSTS
Welcome to 2CarPros. Those studs hold the intake manifold on. They have a washer with a rubber seat that will stick to the intake. If you look at the washer you will see the rubber under it. The hole through the intake is much larger than the bolt which is why it flops around. The problem is that you will need to remove the intake to get the broken part out of the cylinder head. Then you can replace the stud. The images show the intake with and without the studs.
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Tuesday, August 20th, 2019 AT 7:31 PM
Tiny
ANDREW MOORE
  • MEMBER
  • 4 POSTS
One broke and the threads are still in the hole. I pulled the rest of the stud bolts out. I put one back in and it was tightening back up. I have 2 pictures broke and not broke.
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Wednesday, August 21st, 2019 AT 6:06 PM
Tiny
STEVE W.
  • MECHANIC
  • 12,950 POSTS
I have removed them without pulling the intake, I used the metal insert with the stud removed as a guide to use a left hand drill bit to catch the broken part and unscrew it from the head. If you look into the hole the broken one came out of you should see the piece that snapped off.
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Thursday, August 22nd, 2019 AT 1:41 AM
Tiny
ANDREW MOORE
  • MEMBER
  • 4 POSTS
Update: I got the intake off the bolts in the back holding on the pipe that goes to the side of throttle body. I can move it around enough to get the broken bolt out I turned it out with my fingers from the bottom till I could get it from the top. I can clean the top of metal intake and move it to the other side and clean them and replace all seals. Without taking the A/C compressor loose or starter or fuel rails.
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Thursday, August 22nd, 2019 AT 11:10 AM
Tiny
STEVE W.
  • MECHANIC
  • 12,950 POSTS
Good to hear. If you get the chance take pictures and add them to your posts. They may just help others with similar issues.
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Thursday, August 22nd, 2019 AT 5:49 PM
Tiny
ANDREW MOORE
  • MEMBER
  • 4 POSTS
Okay, driver and passenger side of top of intake manifold thanks guys. Runs great now.
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Friday, August 23rd, 2019 AT 1:51 PM
Tiny
STEVE W.
  • MECHANIC
  • 12,950 POSTS
Great to hear. Please return anytime with your automotive questions and thank you for using 2CarPros. Let your friends know about us.
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Friday, August 23rd, 2019 AT 4:33 PM

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