Introduction
A common concern to those who use diesel engines is that the lubricant oil pressure can be abnormally high or low. Knowing the potential causes and solutions for this type of abnormality can be important in ensuring the continued reliable operation of the engine. High and low oil pressure can both cause disastrous engine damage, so it is important to investigate and take corrective action if needed.
High Oil Pressure
One of the primary causes of high oil pressure is clogged oil galleries in the engine. Often, this can be the result of a build-up of sludge or other impurities in the oil. These impurities, over time, will collect in the oil passageways, reducing the area through which oil can flow freely. If this happens, the oil pressure will be higher than normal. If not addressed quickly, serious engine damage can result. To reduce the risk of internal engine damage, it is important to regularly check and change the engine oil and filter.
Another potential cause of high oil pressure is a failing oil pump. When the pump fails, it forces more oil than necessary into the engine, resulting in high oil pressure. To find out if this is the case, the oil pump should be inspected and tested, and if necessary replaced.
Low Oil Pressure
Low oil pressure is often a sign of a worn engine. Over time, the internal components of the engine, such as bearing and camshafts, can become worn down due to wear and tear, resulting in a decrease in the oil pressure. In this case, the only solution is usually to rebuild or replace the engine.
Leakage is another common cause of low oil pressure. Cracks and worn seals in vital places can cause oil to escape from the engine, resulting in reduced oil pressure. Again, the only viable solution is usually to replace the engine or rebuild it.
Conclusion
High and low oil pressure can both be dangerous for diesel engines. High pressure can cause damage to the engine’s internal components, while low pressure can result in engine failure due to lack of lubrication. Being aware of the potential causes of these problems is key to prevent them from happening, and to diagnose and fix them if they do.
