5.4L Engine Coil Pack Bolt Problem
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Trailering
Joined: Jan 2018
Posts: 15
Likes: 1
From: Out in the woods.
5.4L Engine Coil Pack Bolt Problem
Changing the spark plugs on a 2011 E350 with 5.4L Triton. I got all the plugs and coils changed except for one (#7 cylinder). When I tried to remove the coil bolt, it turned hard for a while, but never backed out. Now it will turn all day, but won’t come out, even while applying upward pressure with a screwdriver under the bolt flange.
If I understand it correctly, there is a brass insert in the (plastic?) part below that the coil bolt threads into. I’m guessing the brass insert broke free so that it turns, but the bolt won’t come out.
FWIW, the engine has 308k miles on it (I’ve had since 294k), and the old plugs looked like they had been in there quite a while. I decided to change all the plugs and coils after it started missing a little when accelerating under load. Otherwise runs great.
Any suggestions or insight?
If I understand it correctly, there is a brass insert in the (plastic?) part below that the coil bolt threads into. I’m guessing the brass insert broke free so that it turns, but the bolt won’t come out.
FWIW, the engine has 308k miles on it (I’ve had since 294k), and the old plugs looked like they had been in there quite a while. I decided to change all the plugs and coils after it started missing a little when accelerating under load. Otherwise runs great.
Any suggestions or insight?
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
You're right about the brass insert. Some how it has spun in its bore and is not uncommon. Usually this tends to be user error and somewhat easy to do. Cutting the COP might be the only way to remove it but how to correct the intake problem when re-installing the plug and/or COP is another issue
This guy has about the best solution for repairing this problem:
You do need to be VERY careful removing the COP by cutting as its easy to damage the intake. If you use the above method to renew the insert that's a relatively safe operation although Dorman doesn't use the metal inserts to hold the COP's in place---they use a suitable sheet metal screw. This would require a rather short #10 or #12 pan head screw with the intake hole CAREFULLY drilled to secure the COP in place.
IF you're not careful you'll end up replacing the entire intake. If you renew the brass insert use a dab of dielectric grease or anti-seize on the bolt thread and using nothing more than 1/4" drive tools to secure the COP to the intake.
HTH
This guy has about the best solution for repairing this problem:
You do need to be VERY careful removing the COP by cutting as its easy to damage the intake. If you use the above method to renew the insert that's a relatively safe operation although Dorman doesn't use the metal inserts to hold the COP's in place---they use a suitable sheet metal screw. This would require a rather short #10 or #12 pan head screw with the intake hole CAREFULLY drilled to secure the COP in place.
IF you're not careful you'll end up replacing the entire intake. If you renew the brass insert use a dab of dielectric grease or anti-seize on the bolt thread and using nothing more than 1/4" drive tools to secure the COP to the intake.
HTH
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