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Old 03-10-2019, 05:50 PM   #18
Werner
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Join Date: Jan 2019
Location: Germany, near Aachen
Posts: 1,159
Default Re: installed a new 6:1 head now a tapping noise

I think we mean the same thing. The piston clatters because it "tilts" diagonally against the cylinder wall with its pressure flank during the ignition cycle and then beats against the other cylinder wall during compression cycle.
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Ford Model A, Roadster, 1928
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