Abstract: A cleanliness measuring system for an engine cylinder block includes a set of fittings configured for receipt at least partially within oil passage openings of a lubrication system of the engine cylinder block. Each of the fittings includes a fluid collection passage therethrough. The cleanliness measuring system also includes a set of fluid sampling bottles configured for attachment to the fittings. In an attached configuration of the cleanliness measuring system, each of the fluid sampling bottles is attached to one of the fittings and the fittings are secured within one of the oil passage openings, a fluid is introduced into the lubrication system, the fluid and any debris carried by the fluid from within oil passages of the engine cylinder block flow into the fluid sampling bottles, and debris collected in the fluid sampling bottles is measured to determine a cleanliness level of the engine cylinder block.