New C4 Exhaust System Aluminum Cylinder Heads
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Since our '87 is equipped with aluminum cylinder heads, we cleaned off the old gasket material by pulling rather than pushing on a razor blade in order to prevent gouging the metal. The gasket surface needs to be perfectly clean to prevent leaks. We cleaned the last of the gasket material off with an abrasive pad, but we left the spark plugs in and also plugged the exhaust ports in order to keep abrasive particles out of the engine. View Related Article
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