(excerpted from
Start with maintenance, end with disaster. Or opportunity )
So here's the second piece of bad news (after the broken head stud and before the broken ring, in case you're keeping score).
This doesn't seem right for a 60,000 mile engine. What are possible causes?
Obviously a regrind is necessary. Recommendations? 964 grind? Webcam 20/21? Pixelated magic fairy dust?
Anyone have 964 cams or SC cams they'd like to see go to a loving home?
Next question: Given I have two cam lobes that look like this, should I spend the money and time to open the case and see what lurks inside?