Reply to "Mysterious Cleveland alu rocker valve train"

Finally had time and no sleeping neighbours+fresh Royal Purple. Did the 1/8th, a lot less than I usually do, had a tick, tightened another 1/8, total 1/4 from loose push rod. And btw checked all pushrods for straightness, no issues. Started and adjusted the idle. I'm back to the old days, need 1000 rpm idle excl A/C, and can with a nice 4 corner adjustment show 12 vacuum. Had worse. And of course nowhere near the 20 I had earlier. Maybe somebody should invent a valvetrain that works like mine did this spring, same performance I think, and great idle, without the binding and grinding of course.

Then put on the fabricated alu valvecovers that I bought last autumn, and they do sound ever so slightly more "metallic", but from the inside of the car, you'll hear no difference.