Integrated ignition coil and oil seal for head and cam cover

An ignition apparatus for an internal combustion engine having a cam cover enclosing engine valves, actuation therefor, and at least a spark plug engaged in an opening in a cylinder head, comprising:

• a transformer assembly including a central core, a primary and a secondary winding, and an outer core, said central core being elongated and having a main axis, said primary and secondary windings being disposed radially outwardly of said central core;
• a case configured to house said transformer assembly, said case including a high-voltage (HV) connection at a first axial end thereof configured for direct mounting on the spark plug, wherein said HV connection comprises a high-voltage (HV) connector assembly for electrically connecting to the spark plug;
• a spark plug boot surrounding a portion of said case and comprising electrical insulating material;
• a first sealing arrangement disposed opposite said first axial end configured to seal said ignition apparatus to said cam cover;
• wherein the cylinder head includes a first feature disposed therein surrounding the spark plug opening, said spark plug boot including a second feature on an axial end thereof proximate said HV connection, said first and second features being complementary so as to form a second sealing arrangement configured to seal said spark plug boot with said cylinder head.