If you think the debris went through the little hole, it ended up in the combustion chamber. Removing the valve cover would put you in the valve train, no debris that went through the spark plug hole would be found in the valve train. It sounds like you had some porcelain make it's way into the combustion chamber. You can run it, it will eventually turn the porcelain into dust and process it. Pulling the valve cover would expose nothing that you could have created. Having not heard the noise, I can only suspect. It may be the result of carbon on the pistons causing noise as well.
Thursday, April 9th, 2009 AT 4:57 AM