I'm going to be changing the coils and plug on my 01 5.4 s crew and just wanted to know if it is better to do this change with the engine cold or slightly warmed up. I'm not saying at operating temp just slightly warmed up if it will make anything easier to remove.

THANKS
Hyper GT

 

Cold, heat expands things so do it cold.

 

Don't do that model warmed , you increase your chances of stripping X2. You only have 4 threads @ the botom of the chambers. So do it in the freezer if you have that option.