1999 Volvo Penta "WT" Models Workshop Manual, Page 104Get this manual
rn ridge at top of ring travelThistaper, out-of-roundwith exces2Check the cylinder walls for or sive should be done dial indicator (use Tool J-8087)Set the gauge so that the thrust pin must be forced in about in(6,35 mm) to enter gauge in cylinder boreCenter gauge in cylinder and turn dial to "0"Carefully work gauge up and down cylinder to determine taper and turn it to different points around cylinder wall to determine the out-ofround conditionIf cylinders were found to have more than 0.002 in{0,051 mm} out-af-round, boring will be necessaryRepair
The performance of the following operations is contingent upon engine condition at time of repairIf the cylinder block inspection indicated that the block was suitable for continued use except for out-of-round or tapered cylinders, they can be conditioned by honing, or boring and honingIf the cylinders were found to have less than 0.005 in(0,127 mm) taper or wear, they can be conditioned with hone and fitted with 0.001 in(0,025 mm) oversize pistonsA cylinder bore of less than 0.005 in(0,127 mm wear or taper may not entirely clean up when fitted to 0.001 in(0,025 mm) oversize pistonIf it is desired to entirely clean up the bore in these cases, it will be necessary to rebore for an oversize pistonIf more than 0.005 intaper or wear exists, they should be bored and honed to the smallest oversize that will permit complete resurfacing of all cylindersPiston Selection