Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
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Engine Started To "Ping" After 2 Years?

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Old Jun 11, 2022 | 10:10 PM
  #21  
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Originally Posted by 71R/T
I haven't seen it mentioned but it could be carbon buildup in the combustion chamber or on the top of pistons.
I agree with this after seeing the build up on pistons with 5000 miles on them. Steve coles suggestion is what it probably needs. Poke a camera down in there and you might be surprised what you see. Good luck
 
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Old Jun 13, 2022 | 08:19 AM
  #22  
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Another thing I've had happen is a small bit of carbon that's 'sharp' or 'pointed' can heat up to the point that it acts like a glow plug. I cleared this up once with a plug change. I also used to de-carbon my car engines (back in the 60's when they ran like crap) by holding the carb open on a high idle and dribbling a bit of water into the engine. It would flash to steam and break up the carbon deposits. Not sure I would want to do this on my super clean runnning M8 though.... Fresh plugs and some runs to redline seem worth a try.
 
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