[callbald]

In reading various instructions on doing the test, I do not see anything about engine temperature. Should the engine be warmed up?

As to why i am doing the test, I have oil on the spark plug threads and the valve cover seals are not leaking. Thinking it may be valve stem seals, I want to do a health check to see if there are more problems before diving in.

Some one thought I could be seeing fuel on the treads, but there was no fuel smell. Side note, I did have one massive backfire this past summer with raw fuel getting into the muffler and blowing it apart.