Sad to say, this is a problem on the SOHC motors.... Ford does not condone
the use of thread inserts (they can effectively change the heat range of the
spark plug - yes, it happens.. if you need I can explain) and the dealer
will want to replace the head to preserve the Ford backed warranty. I have
heard that many independent shops have used thread inserts successfully.
Bear in mind that I probably wont hear of any of these repairs going bad
since no one wants to admit it.
If this were my truck, I would likely proceed with the thread insert but I
would pay close attention for the first few thousand miles to any abnormal
or unexpected noises/conditions.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.