Oil Bath Air Filters -

Oil Bath Air Filters

Long before people started using cotton gauze air filters soaked in oil, the oil bath air filter was the dominant filter on the market. The filter removes debris in the air by running it over oil and a mesh element. These filters worked great when most roads were dirt, but they could be messy to clean.

small-block-engineLong before people started using cotton gauze air filters soaked in oil, the oil bath air filter was the dominant filter on the market. The filter removes debris in the air by running it over oil and a mesh element. These filters worked great when most roads were dirt, but they could be messy to clean.

The oil bath air filter pulls in outside air and makes it turn 90 degrees over a pool of oil. This helps to remove the large, heavy particles. The air then travels over a filter element that rests in the oil and wicks it into the fibers (often made of steel mesh). Some early filters used horse hair for the element, while some more modern filters used foam.

0-od10040018imThe filter element could be cleaned with kerosene. This was typically the job of the newest guy at the shop. The oil used for the bath was typically engine oil that had to be filled to a specific level for the filter to be able to catch debris. The element could last the life of the vehicle in some cases.

As roads improved in the 1950s, the need faded away for a filter that could hold a lot of dirt without clogging. Thus came disposable pleated paper filters, which could filter smaller debris.

Article courtesy Underhood Service.

You May Also Like

How ADAS Systems Perform

When new technologies are applied to driver safety, a higher level of scrutiny and service is required.

New automotive technologies might work great when they roll off the dealer’s lots, but independent shops know that some technologies do not age well. It could be an LCD digital dash now blank or a variable valve timing actuator damaged internally due to a lack of oil changes. However, when new technologies are applied to driver safety, a higher level of scrutiny and service is required.

Air Ride Suspension Diagnostics

The key to understanding the embedded logic of air ride systems is using service information.

Steering Angle Sensor 101

The steering angle is used by many ADAS functions.

BMW N54 Turbo Problems

Here are some common problems or failures that you should be on the lookout for.

Mercedes-Benz Engine Oil Leaks

Mercedes makes a fine product, but certain repairs will emerge as trends over time.

Other Posts
Brake Pad Wear Sensors

Brake pad wear sensors have been around for years and continue to evolve.

Turbocharger Topics

Turbochargers have made a comeback – and it’s been quick.

Clutch Release Problems

Poor clutch release makes it difficult to start and stop the vehicle or change gears.

Clutch Release
Drilled and Slotted Rotors

There’s real science behind the location of holes, slots and grooves in today’s brake rotors. Plus, they look great too.