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Old 01-06-2020, 06:03 PM   #1
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Join Date: Feb 2018
Location: PA
Posts: 198
My Ride: M3 Vert, 330xi, X5
Year: 2002
Model: M3, 330xi, F15 X5
Transmission: 6 spd manuals
Spark Plug Removal

In the midst of troubleshooting a misfire and was trying remove a spark plug. At first it was relatively loose, but the more I turned it the more difficult it became to turn to the point I was afraid of stripping the threads.

So here is the question, I was attempting this w the engine hot, just returned home from 60 mile commute. Does it matter if the engine is hot or should I hold off til the engine cools down?

I tried 2 cylinders and both reacted in the same fashion. I have never had them out during my ownership so 30k miles and 1.5 years. Therefore I cannot speak to how they were installed.

Thanks for the help!

05 330xi for reference.

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Last edited by Brewtus79; 01-06-2020 at 06:04 PM.
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