The procedure described in the preceding PART 1, utilizes a feeler gage to measure the distance the exhaust valve stem has moved. Although this method is satisfactory, it has been found that it is much easier to measure movement of the valve stem if a dial indicator is used instead of the feeler gage. Refer to Figure 7 for modification of a P/N ST-71 fixture and to Figure 8 for modification of a P/N ST-310 fixture.