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Ring Sticking

Ring sticking must be distinguished according to "hot sticking" and "cold sticking". Whereas cold sticking refers to rings which essentially stick, or jam, in the piston grooves only in the "cold" condition, e.g. during piston disassembly, hot sticking is a state in which the rings are impeded in their movement or even totally jammed in the grooves under engine operating conditions. Sticking occurs when the oil together with combustion residues cokes up the piston groove and cannot be flushed out.

Remedial actions:


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