97 civic hx valve lash

I’m at a loss. I adjusted the valves this morning triple checking them and making sure everything was where it was supposed to be. I ran the car and it starts to over heat a little bit. I have it parked at work as when I first started driving it, it didn’t have any knocking or anything like before. Now before I turned it off you could hear the knocking again but it was not as audible as before. All of the valves are to spec. it is .20 for intake and .25 exhaust. the feeler gauges are .207 and .253 mm. They have the same thickness and feel as if you took oil on your fingers and pinched the feeler gauge. It feels smooth so why would it be giving me these issues? Is there another size I should be doing?