Diesel marine engines rely on lubricating oil to reduce friction and wear between moving parts, as well as to cool and clean the engine components. Lubricating oil pressure is an important indicator of the engine’s health and performance. If the lube oil pressure decreases gradually over time, it may indicate some potential problems that need to be addressed. Some of the possible reasons for lube oil pressure drop are:
possible reasons for engine lube oil pressure drop are
– Low lube oil level: The lube oil level in the sump or tank may decrease due to leakage, consumption or evaporation. This can reduce the amount of lube oil available for circulation and cause the pressure to drop. To prevent this, the lube oil level should be checked regularly and topped up as needed.
– Dirty or clogged lube oil filter: The lube oil filter removes impurities and contaminants from the lube oil before it reaches the engine parts. Over time, the filter may become dirty or clogged and restrict the flow of lube oil, resulting in lower pressure. To prevent this, the lube oil filter should be cleaned or replaced according to the manufacturer’s recommendations.
– Worn or damaged lube oil pump: The lube oil pump is responsible for delivering lube oil to the engine parts at a certain pressure. If the pump is worn or damaged, it may not be able to provide enough lube oil flow or pressure. To prevent this, the lube oil pump should be inspected and maintained regularly and replaced if necessary.
– High lube oil temperature: The lube oil temperature affects its viscosity and density, which in turn affect its flow and pressure. If the lube oil temperature is too high, it may become thinner and less effective at lubricating and cooling the engine parts. This can also cause the lube oil to oxidize and degrade faster, leading to more sludge and varnish formation. To prevent this, the lube oil temperature should be monitored and controlled within the specified range by using a cooler or a heater as needed.
– Excessive engine wear: As the engine operates, some of its parts may wear out due to friction and corrosion. This can create more clearance between the parts and reduce the resistance to lube oil flow, resulting in lower pressure. To prevent this, the engine should be operated within its design limits and serviced regularly according to the manufacturer’s recommendations.
So, these can be the foremost reasons for lube oil pressure is going down.