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What could cause intake manifold on my 3.8L GM engine to have a small hole melted in it?

April 26, 2017cause engine GM hole intake Manifold melted small

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What could cause intake manifold on my 3.8L GM engine to have a small hole melted in it?

1 Answer

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10 Posted

One of the most common causes is a plugged catalytic converter. Exhaust back-pressure flowing through the exhaust gas recycle (EGR) system can quickly burn through the plastic intake manifold. For more information on please see our Detailed Topic, Catalytic Converters Problems.