Problems that can cause an oil leak
Checking the Oil Level
Checking the oil level in an engine is something that is often forgotten. Why is oil so important for a car? Maintaining the correct level is essential as oil lubricates, cleans, cools, and protects the moving parts of the engine. It prevents it from wear and excessive heat.
Low Oil Level
A low oil level can cause heat to build up in the engine and this can lead to the hardening of seals and gaskets which can lead to engine oil leaks.
High Oil Level
If the oil level is too high then this can increase crankcase pressure. The cause could be that the oil system has been overfilled with oil or fuel from an injection system fault or failed DPF (diesel particulate filter) regeneration. The result is an increase in crankcase pressure attacking the materials of the seals and gaskets causing leaks.