Seized Plugs
Thread Starter
|
Senior User
Joined: Apr 2004
Posts: 293
Likes: 0
Seized Plugs
I have an 09 150 with the 5.4 and have been hearing from my buddies, with older 5.4's, that their plug changes have cost them in excess of $700 due to the plugs being stuck in the head and snapping off when the shop removes them. My question is, has Ford addressed this in the later 5.4's or should I not wait till 100k to change the plugs and do it sooner and add anti-seize to the threads?
Fleet Mechanic
Joined: Aug 2002
Posts: 1,899
Likes: 29
From: Raleigh USA
The new plugs look like a 4 wheeler plug
https://www.ford-trucks.com/forums/8...n-engines.html
scroll down to third post
https://www.ford-trucks.com/forums/8...n-engines.html
scroll down to third post
Thread Starter
|
Senior User
Joined: Apr 2004
Posts: 293
Likes: 0
So, how does the new design prevent them from seizing in the head? I was under the impression the original problem was related to the aluminum head and steel plugs?? Was it a carbon issue?
Trending Topics
Elder User
Joined: Nov 2001
Posts: 892
Likes: 1
From: Duluth, MN
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Laughing Gas
Joined: Oct 2005
Posts: 1,058
Likes: 1
From: South Jersey
The old spark plug was a 2 piece design, the elongated electrode body was threaded into the main plug. The problem was carbon would build up around the elongated part in the cylinder, making it hard to remove the plug and causing the plug to break, leaving the electrode still in the head. A special extractor tool was then used to thread into the broken piece in the head to remove it. Late in 2008, a one piece plug was used to hopefully eliminate this issue.
Freshman User
Joined: May 2010
Posts: 28
Likes: 0
champion offers a spark plug to replace the 2 piece design with a stronger one piece.havnt tried them myself or seen them being used in our shop.
have had about 4 or 5 2006+ 5.4 come in a week after they get there plugs changed due to the mechanic globbing anti seize onto the threads of the plug to "prevent" it from breaking off inside the hole.considering the tread has nothing to do with the reason they break! but back onto the topic of the anti seize,after a 100 km or so the anti seize heats up turning into liquid and seeping its way down to the electrode causing fowled plugs.nice preventable maintenance.
so DONT PUT TO MUCH ANTI SEIZE.
have had about 4 or 5 2006+ 5.4 come in a week after they get there plugs changed due to the mechanic globbing anti seize onto the threads of the plug to "prevent" it from breaking off inside the hole.considering the tread has nothing to do with the reason they break! but back onto the topic of the anti seize,after a 100 km or so the anti seize heats up turning into liquid and seeping its way down to the electrode causing fowled plugs.nice preventable maintenance.
so DONT PUT TO MUCH ANTI SEIZE.