I changed plugs in the Lexus and according to the service manual there is no mention of using any dielectric grease. I know Ford scares you about using it, like you car will explode if you don't. They even have a special product. I didn't use any grease and felt a bit guilty.
I asked a Toyota place on the way to work and a tech said it is not necessary and you are fine. He said the coil seal on the valve cover is more than enough. The coils slid right off the plugs, they must use a high quality rubber. I doubt any grease was used.
What are your opinions?
I asked a Toyota place on the way to work and a tech said it is not necessary and you are fine. He said the coil seal on the valve cover is more than enough. The coils slid right off the plugs, they must use a high quality rubber. I doubt any grease was used.
What are your opinions?