I need advice before I take the dealership apart about my recent repair. If you have followed my two threads about a rough idle problem and subsequent burnt valves, I would like to know if the mechanic who did the original valve adjustment (2500 miles ago) would have been able to detect those burnt valves at the time of adjustment. Knowing nothing about the adjustment procedure, would he have been able to visually assess the valve condition when he adjusted them. They are claiming that the valves (#3 and #6) were burned before the were adjusted. Wouldn't that have shown up as a rough idle problem or lack of power at that time? I get the feeling that they didn't do a compression test until this recent problem and then only to find the burnt valves. What say you?