Issues with Oil Filters

All engine oil filters or heads are equipped with a bypass valve. This valve is needed so the engine does not become starved of oil as the filter clogs with debris.

An oil filter's bypass valve is a safety measure when the oil filter becomes clogged, or the oil is too thick. It's also known as a pressure relief valve. Basically, when oil can no longer pass through the filtration medium, the bypass valve opens to allow the oil to flow directly to the engine. A special note depending on the brand of oil filter there are different types of bypass valves used . I personally like the spring type , IMO