I removed these plugs at 34,500 . The motor is 234,5K total miles. I still get very smooth acceleration, no excessive oil burning, smooth idle and good mpg. Are these normal wear for this condition? I am trying to figure out if I still have good combustion and no coolant leakage into cylinders before I invest in intake/ccv,vaccum lines etc. Waiting for friend to help with compression test.
Thanks
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Hope I ddi this right. Thanks again.