intake and exhaust cover bolts to get to my valves to adjust them are completely seized I tried every and all effort to get the off to adjust my valves... I can here my valves tapping... So hear is my question ::: can I just remove the cover????? I believe its 4 10mm bolts and 4 Allen head and I have some gasket maker rtc silicone.. Is it really that easy.. It's a 200s motor...