In the previous class, Ed showed you how to clean the valves and prepare them for reinsertion into the head. Now, you’ll learn how to lap in the valves using grinding paste and then decoke the engine in order to increase its efficiency and ensure top-notch engine performance for another several thousand miles. Ed introduces the tools you need to complete this process and then shows you how to use them.
Any capable restorer of classic cars ought to know how to decoke an engine. Over time the engine on a classic car becomes backed up with carbon, which causes the efficiency of said engine to drop. When enough carbon builds up, it might be time to decoke the engine–but how do you know whether it’s the right time?
Throughout this course, Danny and Ed will teach you some of the basic tips any car restorer needs to correctly maintain cylinder heads and gaskets, focusing on how to decoke an engine once the head has been removed.
In the final step of the engine decoking process, you’ll learn to reassemble the head, replace a new gasket, and remount the cleaned and decoked components onto the engine block. Ed walks you step by step through the finishing methods needed to put the cylinder head back together and make sure everything is properly affixed and operational.
In the second half of our cold engine check, Danny and Clive disengage the spark plug leads to take a closer look at the quality and cleanliness of the spark plugs. They also inspect the brake and clutch fluid reservoirs, oil and coolant. Before cracking on to the warm engine inspection, be sure to walk through each of the components Danny and Clive cover, looking for damage and other abnormalities.