The oil filter housing in a car is the component that encloses the oil filter and is mounted onto the engine block. It can be made of metal or plastic and includes a threaded cap or cover that secures the oil filter in place, as well as a gasket that seals the oil filter housing to the engine block.

The primary function of the oil filter housing is to provide a secure and leak-free attachment for the oil filter to the engine block. It also serves as a passageway for oil to flow through the oil filter and return to the engine. Additionally, some oil filter housings may contain an oil pressure sensor or oil cooler, depending on the make and model of the vehicle.

Causes and fixes of the oil filter housing

A malfunctioning oil filter housing can lead to a variety of problems with your engine's performance, such as poor fuel efficiency and reduced power. Why oil filter housing leak?

Oil leaks: One of the most common causes of oil filter housing issues is a leak in the housing. Over time, the gaskets or seals that keep the oil inside the housing can wear out, leading to leaks.
Cracked housing: The oil filter housing can also crack due to excessive vibration, stress or age.
Clogged filter: A clogged filter can lead to reduced oil flow, which can put added stress on the oil filter housing.

To prevent leaks, it's recommended to take proactive measures during the installation process. Before installing a new filter, make sure the housing is clean and free of debris and old gasket material. Inspect the new filter for damage, such as dents, damaged threads, or cut or warped gaskets, and ensure that you're using the correct filter number. Apply a light layer of oil around the gasket to prevent it from binding during installation, and thread the filter onto the engine by hand, being careful not to overtighten it. Follow the manufacturer's recommended torque for the filter. Finally, check the oil level and add more if necessary.

In case of a serious oil leak, stop the engine and have the car towed to a shop for repairs. If you want to diagnose the issue yourself for minor leaks, clean the area to determine where the leak is originating from. Remember to take proper safety precautions when working with a running or hot vehicle.