Coating Inspection (graphite layers at the piston)
Coating Inspection: Actually, graphite layers at the piston should be inspected wet. In this example the already burned-in layer is inspected!
Picture 1 shows the pistons before the inspection, picture 2 afterwards. Picture 3 and 4 show a flawed layer!
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Picture 1
Piston before the inspection
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Picture 2
Piston after the inspection
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Picture 3
Piston with a flawed layer
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Picture 4
Piston with a flawed layer