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Why would there be oil in the carburetor on a Chevy 350 5.7 Engine?
Wiki User
∙ 11y ago
Oil in the carburetor can be from a few things. Check the PVC valve. its the thing sticking out of the valve cover. If it rattles when you shake it its generally okay. It could be from clogged oil drains, these are located under the valve covers towards the rear of the engine. Cleaning these can help.
Bad rings and/or valve seals can also be part of the problem. Over time the rings get worn and blow-by happens. this is when the compression causes the oil to be blown by the rings into places it shouldn't go. Generally when the rings are worn you'll get smoke from the exhaust. Valve seals get old and crack or wear out. replacing those might as well help. Failure of the rings, valve stems and/or PVC can cause positive pressure which will push oil up the crankcase to carburetor breather. If your not blowing blue smoke I would just clean the PVC valve, clean the breather filter and in some high performance engines a oil/air separator is installed.
Wiki User
∙ 11y ago
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