Motorcity muscle
Full Access Members
Replace the plugs today, truck had 120,000 on it when I got it. Now has 134,000, multiple misfires and loss of power. No vehicle history on maintenance. All eight broke, had the Lisle 700 tool, pulled the metal 9/16" plug sleeve off of the plugs ceramic on all but one. Hardest part was breaking off the remaining ceramic on the back two plugs. Ending up using a socket that just fit over the end of electrode tip to gain leverage to snap ceramic so could use tool to push ceramic down and then use extractor that threads into remaining metal sleeve. Dealer wanted 100 per plug to remove, plus labor if they broke. Guessing it would have been a 1,500 bill all said and done. Found corrosion up inside two of the coils where the spring attaches. Running good now, hope this helps others doing this repair. The newer Lisle 700 included a third tool that was designed to push over electrode tip to remove the top of plug but did not work, so stick with the original Lisle 600.