I have a 2017 Honda Accord EX-L V6 with a 6 speed automatic transmission. It currently has 55k miles on it and I'm wondering if I need to change the plugs. There seems to me to be some really minor hesitation on slow acceleration but it's hard to tell if it is the engine or transmission, or my imagination. I don't recall this from the past, and maybe it's nothing, but could plugs be the problem? Is there any kind of diagnostic test that Honda can do to find faults (like a machine they could hook it up to)?

Also, if I do need to change the plugs, do you recommend using Dielectric grease on the threads? I've seen this in some videos.


Thanks for any input.

 

Nope, plugs aren't needed for another 50,000 miles.

 

Thanks, must be my imagination

 

Dielectric grease would be good on the rubber boots that go over the spark plugs. That grease doesn't conduct electricity, but it keeps the rubber from gluing itself firmly onto the porcelain part of the spark plug. You won't notice any difference until NEXT TIME you have to change the plugs.

Anti-seize grease (Permatex makes a couple different flavors of that stuff) would be good on the spark plug threads. The threads have to conduct electricity to the cylinder head and you don't want insulating grease there.

 

Thanks. I had seen a video where the guy was putting the dielectric grease on BOTH.
Glad you responded.

 

It probably worked sorta OK because the dielectric grease won't prevent some amount of metal-to-metal contact at the threads. But anti-seize compound works so much better to prevent the plug from seizing in the head.