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Right Hand Valve Cover Gasket – 198927: https://bit.ly/2HQ2rDF
Left Hand Valve Cover Gasket – 198928: https://bit.ly/2HUGiEi
Spark Plug Gaskets – 223982: https://bit.ly/2HRnNR4
The valve cover gaskets on the Ferrari F430 are prone to having some leaking after a while. You can try to tighten down the valve cover bolts and sometimes that will solve the problem, but frequently the gaskets simply need to be replaced.
Replacing the gaskets requires removing the valve covers. To remove the valve covers you have to disconnect the wiring harness, pull the ignition coils, disconnect the cam position sensors, and disconnect the valve timing actuators. Once all these components are out of the way, you can remove the valve cover bolts and pop off the valve cover.
I was not able to fully remove the valve cover so I pulled off the old gasket and installed the new gasket while the valve cover was still in the engine compartment. I also replaced the ignition coil gaskets while I was in there.