cylinders

Hi Guys! I’m flying a Cessna 205 with a Continental IO-550 in it. My CHT’s readings are similar except Cylinder 6 c1 390°F c2 380°F c3 365°F c4 350°F c5 370°F c6 214°F Is this something I should be worried about? Is 200°F too cold for a Cylinder? The airplane just came out of the last...

There are lots of threads about diagnosing valve leaking and failure, but my friend “Search” was unable to tell me what the options are if you have a bad valve. If you have a valve that doesn’t improve with lapping or has cracks on borescope, what are the options? And what kind of time and cost...