How common is it for the hold down bolt on a coil pack to break off? Getting ready to replace plugs on my 2018 5.0 with 52,000 miles and I have been reading about these bolts snapping off. Should I use penetrating oil prior to removing or does it really matter?

 

They aren't super tight. They should just be snug. No need to go Hulk on them when tightening. They screw into brass inserts in plastic.

 

I was actually referring to the possibility of the bolt breaking off in the plastic while attempting to remove the bolt not installing

 

Exactly how is some penetrating oil going to hurt, why not just go for it with the oil?

 

they are screwed into a metal insert inside the plastic which will sometimes break free and just spin but, like art mentioned, they are not very tight to began with. If i remember correctly the torque is only 8-10 flbs of torque. Won't hurt to hit each one with a squirt of PB blaster or WD first.