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Charles, Did you take a spark plug out and look at your piston heads? When I pulled mine off my car at 9,000 miles they had a thick layer of
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05-12-2014, 05:16 PM
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A True Z Fanatic
Join Date: Jun 2012
Location: Minneapolis
Posts: 2,651
Drives: 06 350Z , 09 370Z MT
Rep Power: 6834   |
Charles, Did you take a spark plug out and look at your piston heads? When I pulled mine off my car at 9,000 miles they had a thick layer of carbon on them. After I soaked one with ethanol due to a bad injector, the carbon started "melting" away. I am very curious to look at them again after I put on some miles.
The reason behind the melting is that I put a weld rod into my cylinder to find TDC for a leak down test and when I looked into the soaked cylinder you could see where the rod had been sitting. It was a round spot that was copper colored. I thought I had a chunk of something in there so I freaked out. After I tried with a magnet to get it out it became bigger and bigger till I realized it was carbon just getting pushed around.
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