Just to add.. that was the only cylinder that did not hold the air. Some luck, but then my mechanic friend rescued me and helped complete the job. Oil consumption went from 1qt/1000 mi to 1/2 qt/1500 mi. I know 1 qt/1000 miles is not excessive, but I was worried about the catalytic converter. Oil burning decreases the life of CC. Car runs perfect even though I probably have a burnt valve in this one cylinder.