Most likely bore scoring?
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Most likely bore scoring?
Hello guys, I have 06 c4s but having this noise issue, can you plz tell me if this is most likely bore scoring noise?
unfortunately we didn't have ultra wide angle bore scope so we couldn't see the side walls, but cylinder #5 was clean but 6 had soot on the plugs and oil on the piston.
here are the videos i uploaded.
Thank you!!
unfortunately we didn't have ultra wide angle bore scope so we couldn't see the side walls, but cylinder #5 was clean but 6 had soot on the plugs and oil on the piston.
here are the videos i uploaded.
Thank you!!
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Joined: Apr 2012
Posts: 2,095
From: Clemson, SC
Rep Power: 134
Sorry to say, that's exactly what that is. Rod knock from a scored bore and why there's oil on the #6 piston as it migrated up through the score lines in the cylinder walls, and a sooty spark plug and left tail pipe. #6 is the most commonly effected cylinder followed by #4.
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