Had my plugs changed at 85000 miles, they were replaced with 515 motor craft plugs now I see motorcraft has new hotter plugs that are the best so I want to change to them the question is that the 515 plugs were supposed to eliminate the breaking off problem is this true ?? Has anyone had problems with the 515's I've now got about 40,000 miles on them.. THANKS Dallas Hi glc thanks from all of us dummies.

 

The 515's are still 2 piece, so you need to follow the procedure for removing them. I don't know whether the new 546's are hotter or not, but they are the current recommendation.

 

glc has spent so much of his time helping soooo many on this forum I thank some sort of award should be in order, I've read so many posts in the last couple of years from people like me who are not so keen on working on these and it seems Mr glc is almost always there with his knowledge to assist. So for my part here's a BIG THANK YOU from us.....