You can always loosen one of of the rocker adjustment nuts and then push the rocker arm to the side to see if there is any wear on the shaft. I recently replaced my rocker shaft as it had noticeable grooves (felt with fingernail running across). My motor was VERY noisy. Much more so then others. Sounded like a Mac truck:-) I had all sorts of problems though. The rocker shaft was worn, but also my valve guides were...with only 1500 miles on them. Apprently there have been strings of bad batches of poor quality guides, valves and for sure seals going around. We be livin in uncertain times my friends:-)

Just paranoid I guess. Blown gasket experience is very traumatic.

Your car sounds fine to me, and the rockes are doing exactly what they are supposed to.  It sounds like a "well-oiled swwewng machine" to me. On the "other" video, that engine has a problem. Note the engine shakes - has a twitch regularly.

The red rockers on it seem to not be consistent, but that is from the strobe effect of the video's frames/second.  If you watch one of the red rockes, it seems to depress twice for each sequence. Yhe only way it coud do that is if it had a double-hump cam (which would be self-defeating.

Your rockers can only move when the cam pushes up on the appropriate rods. The only way you could have an incorrect pattern is if the cam lobes were loose on the camshaft... but they aren't - it's a single forging!  The only other way a rocker might not move when it is supposed to would be when a valve got stuck or a valve spring broke. Either way, the engine would also run very roughly and soon die a horrible death hen a valve met a piston.

This is the video I saw.

https://youtu.be/BfevqEWvtd4?t=1m8s

I know the car and rocker assembly is different from mine but the movement pattern has a very distinct count pattern compared to mine. Mine moves simultaeously seems like its just straight up and down without any other pattern. Its probably just the helicopter mechanic in me coming out everytime I inspect my car. Im just being strict I guess.

The temperature peaks just between the third thin line and thick line under 190 degrees fahrenheit. On freeway sometimes it will just stay on the thickline but never went past it. It is not electronic but it does the job for me. I mounted a separate cooling fan under the weel well against the firewall screen pulling hot air from the rad. I only turn it on when Im waiting for food at In and Out Burger drive thru (just to play safe).

Sounds OK to me. How wobbly are the the rockers on the rocker shaft? Rockers shafts and rocker bushings are prone to wear out. BTW the rockers in a Cooper engine should be forged. The pressed steel rockers you have suggets a regular Mini 998 engine. Also you're fortunate to not have it over heat there is sunny SanDiego. 4200 rpm at 65 is about right for the 3.44 diff which makes 16 mph/1000 rpm.  

I recorded a video of my engine without the rocker cover off today after chatting with Ratrodmini. He has issues about his engine's pushrod noise and it concerned me how mine is currently performing. I've never had or seen a classic mini that actually ran really ok in person so I figured I'd let everyone watch and review this short clip. Hopefully I'd gain more knowledge so I can maintain my car better.

Its bothering me now because I just watched other videos online and mine seems off especially when you pay attention to the rockers how they move. Are they supposed to have a simultaneous pattern like that? I don't hear any knock but these are noisy and I've been assuming this is how an old A series sounds like.

The car is 1963 Austin Cooper and I believe the motor is a later 998 Cooper Engine. Almost everything is stock on this engine except the pertronix electronic distributor and coil. The carburetor is HIF38 with the manifold from minispares. It has LCB headers. Compression tests at 168 -175psi across (Taken just almost a week ago) Its been running ok a few months now but I just want to know your opinion about it.

Maybe worn cam followers/ lifters? Could be anything. It's a 998 and ideally I'd like a 1275 or better motor since I drive it on the freeway a lot and I don't wanna keep stressing this poor engine anymore. I've driven it a lot but I never went past 65mph using my gps @ 4200 RPM. I know it's a high rev car...

I do have background in aviation maintenance so I know my tools and a little logical thinking but a newbie on old car engines.

https://youtu.be/orMPiWvz-mM

**please don't pay attention to the missing heater valve. That damn thing keeps opening and leaks a little so I decided to get rid of it, tap and install a fitting. Doubt I'd need a heater here in San Diego anyway. Car doesn't overheat.