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28/07/2021 1:22 am
Topic starter
I removed two spark plugs from cylinders 1 and 2. Are they good (see images below)?
These are PK16R11 Double Platinum Denso. The gap is almost the same as for new spark plugs. Lexus with 250k miles.
Cylinder 1
Cylinder 2
2 Answers
1
28/07/2021 7:51 am
I usually like a little lighter color on the insulator but they look OK. A lot of guys use dielectric grease on their boots but I never have.
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28/07/2021 1:29 am
Topic starter
Please see a side view of a spark plug. When I removed this plug, the tip that connects with a high-tension cord was all in dielectric grease. How on earth this spark plug worked inside (for at least several years)?
