#4 spark plug blown out

[JPA]

This is the second time the #4 plug blew out. I had to Loctite it in last time but it blew out anyhow after about 2 months. Is there any hope to fix this without pulling the engine?

 

[Exia]

Get a rethread kit

5.4 Liter Ford Spark Plug Rethreading Kit - Google Search

 

[DR3W]

Google Time-Sert.

 

[DR3W]

Because my #3 has blown twice, I just put a new one in and it's been fine since then

 

[splintrcel]

a helocoil kit will run you around $90 ish but i am not sure what the thread size for a spark plug is. It might be hard to do a helocoil because the metal shavings would fall into the engine.

 

[hovocop]

and make sure to use motorcraft plugs in future

 

[flyin]

14x1.25 threads. there is a kit designed for it where the tools fit the hole in the head to keep everything straight.