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To clean sticking valves on a Chevy 454 engine, start by removing the valve cover to access the valvetrain components. Use a penetrating oil, such as WD-40 or a dedicated valve cleaner, and spray it directly onto the valve stems to help loosen any deposits. Carefully operate the rocker arms to work the oil into the valve guides, and then clean the area with a soft brush. If the problem persists, consider a more thorough cleaning or valve job by a professional mechanic.

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18h ago

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