Getting the plugs changed on my 07 5.4L. It has 80,000 miles on it. A service writer recommended changing the spark plug boots also. Anyone think this is a waste of money? He said there is a chance they could crack when they start taking things apart. I was thinking just have them change them if they do crack but don't if they survive the service. Just looking to see what guys have had done in the past. I think he said these things run about $20 a piece. Let me know what you think. thanks

 

Whenever I change plugs I change wires, its just good maintenance practice.

 

I would just do it or give it 10k and then they will go bad then you will kick ur self in the face for not doing it.

 

I didnt do it would pretty hard to crack them.. I just took them off, cleaned them and then put dielectric grease on and put them back on.. truck runs great..

You will find it about 50/50 on here and others where have say change them and others say just replace as they go out..

 

Here is the real question, has anyone had one crack? I sure haven't heard of it once

I have changed my plugs twice now 133,000 and 176,000 miles didnt change them either time.

 

Your talking about the rubber boot part only and not the actual coil right?

 

All he said was the rubber boots sometimes crack

 

The odds of the boot craking is rare!!

 

I have never replaced mine when I changed my plugs, and I used the same coil packs and boots on my new motor with no issue that's one of the items I say don't fix what is not broken. Save the money for a mod or fuel

 

Hey just thought I'd share my experience. I have a 2006 screw xlt with the 5.4 with just over 84,000 miles. I changed the plugs myself. However I ran seafoam thru the gas tank for about 5 days prior to the change. Then right before I changed them, same day, I ran it thru the vacuum lines and cleaned them out. I used PB Blaster on each plug and let sit for a minute or two before attempting up pull them out. One thing I did that seemed to really help was right before I removed them I tightened them a 1/4 to an 1/8 of a turn then loosened them and they all came out no problems. I'll post pics of the plugs if y'all want