Grinding, " diesel " noise under valve covers

No Sir, I checked the " noise " in park ,then N. New motor, 12. Years ago. Less than 3000 miles. Was a daily driver for less than 2 years. No track use, but, hole shots are fun! As, per , another member here said. " thrust bearing, aka Center Main. Took a 2 'bar and pried forward off the K. Only movement I saw, after putting arm.to it, was " maybe" the balancer lifting the rubber.