In a message dated 4/7/02 12:01:08 AM, you wrote: <<Is there a way to hand-crank the motor without compression resistance to determine the state of the bearings?>> Doug, There is no compression release on the Perkins 4-107. The only way to crank it without compression is to remove, or at least loosen, the injectors. Be sure to get a new set of annealed copper injector washers since they must be replaced if you pull the injectors. The whole test process should take about an hour. Larry Z