Red F

Hey guys, it's time to change plugs in my 08 150 with a 4.6.i have been reading and discover that with my truck having 100k.on it that I have a risk of my plugs breaking and being expensive to fix.is this true?? What plugs are a good replacement? Thanks

Newfiedan

Seafoam the engine 1 or 2 times run some good fuel injection cleaner through the engine and do it with the engine hot not cold. But get the lisle tool just in case. I broke 7 of 8 on my 5.4 but I did get them all out total time even with 7 breaking for me was 5.5 hrs.

Red F

So does the sea foam help prevent the plugs from breaking??

Newfiedan

Yes. It dissolves the carbon build up in the cylinder which is what causes the lower portion of the plug to seize in the head.

Red F

Thankyou

Bruski

NGK Iridium plugs are a good replacement from the stock Ford plugs. Changed mine when truck was warm and all came out no issues. Make sure you use blow out the dirt\sand before taking the plug out.

Ethan Burke

all wrong. you have the 4.6L All the spark plug problems are with the 5.4L

Summers22

iTrader: (2)

This guy has it right! All you people trying to give help on an issue you obviously know nothing about. Come on guys, know what you are even talking about before giving advice......

Bossgame

Just to clarify, those of us with the 4.6 don't have to worry about this at all? What makes it different if you don't mind me asking?

Summers22

iTrader: (2)

Well he has an 08 with the 4.6, that is the reason he doesnt have the breakage issues. 08 being the key. Ford redid the heads on the april and newer 08's. 04-07 with the 4.6 may still experience plug issues.

Red F, if you have brown boots on your COP's, you are golden.