Subaru Legacy At Filter O-ring

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Culprits behind a Bad Subaru Legacy AT Filter O-Ring

A filter O-ring is a very important part of your Subaru Legacy AT because it allows proper sealing between the filter tube and the transmission body. It maintains the integrity of the fluid and transmission interior. But although the Subaru Legacy AT filter O-ring is made of durable, flexible material, its operation with petroleum products, heat, and pressure variations can take its toll. Take a look at the following symptoms of a bad filter O-ring and the culprits behind them:

Low fuel pressure

The most common cause of low fuel pressure is having a bad O-ring because it allows fuel to leak past itself. As you remove the O-ring from its seat, you may see signs of swelling, extrusion, discoloration, and cracks. The primary reason for such failure is the oxidation of the carbon black or some aggressive chemical attacked its polymer structure.

Fuel spray

Fuel sprays from fuel rails when the O-rings have been poorly installed or the injectors have been poorly seated. Bad installation may result in a flattened out or split O-ring, which loses its ability to properly seal the filter tube and the transmission body. Fuel sprays can cause damages to the engine, so an immediate replacement needs to be done. Keep in mind that utmost care as well as proper lubrication are crucial when installing a new Subaru Legacy AT filter O-ring onto your car.

Exhaust leaks

The contents of the combustion chamber are compressed as the fuel ignites. This is immediately followed by a rapid outward expansion of gases. When there are cracks in the filter O-rings, they allow gas to escape from the engine cylinder, creating noises of leaking gas. The cracks may have been brought about by the high pressure that surrounds the O-rings.

Fuel smell

When the O-rings are improperly seated or damaged, you will be able to smell the strong odor of leaking fuel in the engine compartment. The fuel vapors can even get into the cabin of your car. And when it comes to fuel leaks, you should investigate your car right away because of the hazard it brings. Ignited fuel can cause fires and even explosions in the engine compartment.