Spark plugs
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Mountain Pass
Joined: Apr 2003
Posts: 201
Likes: 4
From: All over
Spark plugs
So, I just replaced the spark plugs on my '05 5.4. at 190,000 miles, last time I replaced them was at 119,000 miles. The first time I broke 6 out of 8, this time none! What was weird though is that all 4 on the passenger side came out easy while all 4 on the drivers side were thight as hell. What could be causing that?
Fleet Mechanic
Joined: Apr 2016
Posts: 1,653
Likes: 193
Carbon build up around tip of plug
It is highly advised to remove carbon that breaks plugs going in and out . It also changes heat range of plug . Using carb cleaner and a brush or swab, Carb cleaner will disolve carbon. Just be careful to not drop anything in cly . Orig ford tsb on plugs was to soak plug with carb cleaner then turn back and forth to work it past threads . Then they had you coat the snout with nickel antiseize to stop carbon from seizeing it in the future.
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Mountain Pass
Joined: Apr 2003
Posts: 201
Likes: 4
From: All over
The other thing is that I couldn't even get the socket on the plugs, there was a lot of dirt build up around the plugs. I followed the advise of someone on this forum and used a holesaw with a extension to break up the dirt and then blow it out with a compressor.
Fleet Mechanic
Joined: Apr 2016
Posts: 1,653
Likes: 193
Yes the hole saw trick is viable . Changing plugs and boots every 60k is the new ford standard . Blowing air out all around before pulling cops stops some stuff form getting past boots . Then blow out each hole as you pull plugs as you don't want this stuff in cyl ,sand etc .Anti- freeze , oil ,heat destroys boots .Leave all holes covered when open ,I use rags .Its like pin ball something will find that hole .Pulling valve covers is another place to blow air to keep dirt out of oily valve train .
Using carb cleaner in hole helps remove anti freeze ,oil,carbon in tip area etc . Keep your hands clean handling plugs boots as you can contaminate high volt surfaces . If you drop a plug on cement it is not wise to use it . Use rubber socket and be gentle with plugs .
Using carb cleaner in hole helps remove anti freeze ,oil,carbon in tip area etc . Keep your hands clean handling plugs boots as you can contaminate high volt surfaces . If you drop a plug on cement it is not wise to use it . Use rubber socket and be gentle with plugs .
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