spark plug coil thread insert - Ford Transit USA Forum
 1Likes
  • 1 Post By mikeehlert
 
Thread Tools
post #1 of 6 (permalink) Old 08-17-2019, 09:58:PM Thread Starter
Junior Member
 
Join Date: Jul 2019
Location: Baltimore
Posts: 16
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
spark plug coil thread insert

i was changing out my spark plugs on my 250 3.5L. two of the six coils had bolts that had seized to the threaded insert on the intake manifold - as you can see from the photo, the thread insert is still attached to the bolt. I believe I have found the bolt itself on tasca (W714507-S437), but I can't seem to locate the thread insert to replace - has anyone encountered this issue and found the replacement parts?
Attached Images
File Type: jpeg image1.jpeg (50.6 KB, 9 views)

2015 High Roof Extended Length
tanzacat is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 08-17-2019, 11:09:PM
Senior Member
 
surly Bill's Avatar
 
Join Date: Oct 2016
Posts: 4,613
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1797 Post(s)
Have you tried Kroil to get it loose?

2015 T250 MR cargo w/windows, 3.7, 3.73 Limited Slip. Purchased new 9/2016. Richmond, CA
Go Ducks! track&field 84-86 I am the wet blanket you need but are afraid to admit
surly Bill is online now  
post #3 of 6 (permalink) Old 08-18-2019, 12:02:AM
Senior Member
 
spotco2's Avatar
 
Join Date: Mar 2017
Posts: 284
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
That insert is not available from Ford without buying the entire part it came out of.

2018 T350 HD XLT HR EB
spotco2 is online now  
Sponsored Links
Advertisement
 
post #4 of 6 (permalink) Old 08-18-2019, 11:20:AM
Senior Member
 
mikeehlert's Avatar
 
Join Date: Jul 2017
Posts: 149
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 33 Post(s)
Quote:
Originally Posted by tanzacat View Post
i was changing out my spark plugs on my 250 3.5L. two of the six coils had bolts that had seized to the threaded insert on the intake manifold - as you can see from the photo, the thread insert is still attached to the bolt. I believe I have found the bolt itself on tasca (W714507-S437), but I can't seem to locate the thread insert to replace - has anyone encountered this issue and found the replacement parts?


Inserts like this are generally available from McMaster-Carr here in the USA. You can measure size and order online.

This looks like a cast-in one so you’ll need to drill oversized, drive in, and use high strength locktite. Suggest threading a bolt in to tap on with a hammer. Be sure you don’t drill it too big.


Sent from my iPad using Tapatalk
surly Bill likes this.

2017 T-350HD Ecoboost Winnebago Paseo
mikeehlert is online now  
post #5 of 6 (permalink) Old 08-18-2019, 12:18:PM
Senior Member
 
surly Bill's Avatar
 
Join Date: Oct 2016
Posts: 4,613
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 1797 Post(s)
Being a recovering T1N Sprinter owner, I dealt with the famous "glow plug hold down bolt" issue.
The disparate metals of the aluminum head and steel single-use bolt would sometimes fuse, causing the bolt to break off in the head when trying to remove it. Shops would want to install an entire new head, but a Timesert or Helicoil was the common DIY solution. I drilled out the broken 5" bolt and installed a 6x1 helicoil in my driveway without too much drama (other than finding long enough bits and tap to reach 4-5" into the head...). The short little insert in the pic above looks like it would be simple to replace with a Timesert or Helicoil by comparison.

The RISK for this operation is drilling too far and getting into an area where coolant flows. Be VERY AWARE of drill depth, use a collar stop. Grind the bolt a few mm shorter if needed, rather than drill further into the head.

2015 T250 MR cargo w/windows, 3.7, 3.73 Limited Slip. Purchased new 9/2016. Richmond, CA
Go Ducks! track&field 84-86 I am the wet blanket you need but are afraid to admit
surly Bill is online now  
post #6 of 6 (permalink) Old 08-18-2019, 03:16:PM Thread Starter
Junior Member
 
Join Date: Jul 2019
Location: Baltimore
Posts: 16
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Luckily, i didn't end up having to drill.

here's what I did.

1. screwed the bottom portion of that threaded insert into a nut, which I could then hold in place using a wrench; this gave me much better grip on the whole threaded insert and allowed me to twist the bolt back and forth as I did below.
2. sprayed WD40 onto the exposed portion of the bolt, and then re-tightened the bolt into the thread insert so as to lubricate the inside of the threaded insert.
3. loosened the bolt until it reached the point where it became stuck again in the threaded insert, and added more WD40 to the exposed portion of the bolt, and then re-tightened.
4. after 2-3x of doing this, I was able to completely unscrew the bolt from the threaded insert.
5. I then needed to use pliers to unscrew the threaded insert from the nut I had used in step 1, which was no easy task
6. I filed down end of the bolt that was giving me trouble, getting stuck in the threaded insert
7. applied anti-seize to the bolt threads
8. Used JB Weld on the outside of the threaded insert and re-inserted it into the intake manifold
9. Now I'm letting it cure for 24 hrs and then I will screw the ignition coil back down using the bolt that I had filed down in step 6.

What a pain.

2015 High Roof Extended Length
tanzacat is offline  
Reply

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome