New noises after valve adjustment

[cbjukraine]

I adjusted the old valves today. All of the exhaust valves were tight, and only one intake was tight, the rest were ok. I took it out for a test drive, and there was a noticeable louder rhythmic pffft-pffft-pffft sound in the cabin. Also, I managed to create a rhythmic base sound that's kinda like a pah-pah-pah. Here are two wav files of the sounds. In the first one, I put the mic right up to the intake scoop. That's were the pah-pah-pah sound is most audible. The second is a recording of the engine bay in general.

http://cbjukraine.home.comcast.net/Sounds/DSCN2937.wav
http://cbjukraine.home.comcast.net/Sounds/DSCN2938.wav

Some general valve adjustment questions:
1. Is it bad if the valve rotates when you are trying to adjust it. I don't have the wrench that holds the valve spring collar.
2. If the clearance is too tight, does that mean the valve is opening too little or too much?

Thanks, I know you guys will have the answer!