Commissioning after engine overhaul Pressurisation It is of utmost importance that after completion of repair work, ie in the dry condition, internal combustion engines be pressurised with lube oil before being recommissioned. This procedure may also be used for ascertaining damage and the cause of it. If engines are not pressurised, the risk of premature damage to bearing surfaces is very high, because it takes a relatively long period of time until the lube oil sucked in from the oil pan via the oil pump has reached the individual bearing points. Such incipient damage need not necessarily lead to bearing failure, but may affect the function- ing of bearings and shorten their service lives.
4504 Schematic diagram of the flow of oil in non-pressurised engines (diagram shows a V-engine). 10