1999 Volvo Penta "WT" Models Workshop Manual, Page 60Get this manual
9After final honing and before the piston is checked for fit, clean the bores with hot water and detergentScrub with stiff bristle brush and rinse thoroughly with hot waterIt is essential that good cleaning operation be performedIf any of the abrasive material is allowed to remain in the cylinder bores, it will wear the new rings, cylinder bores, and bearings lubricated by the contaminated oilAfter washing, the dry bore should be brushed clean with power-driven fiber brush10Refer to Engine Specifications in the proper engine repair sectionORCSS11
11Permanently mark the piston for the cylinder to which it has
been fitted12Apply clean engine oil to each bore to prevent rusting