This pressure can force oil into places it shouldn't be, such as the combustion chamber or the turbocharger seals, resulting in carbon buildup and oil leaks. In severe cases, the oil leak can create a visible puff of smoke from the intake tract, and the engine may experience a loss of boost or rough idle due to the clogged airflow sensor.
WRX Air Oil Separator Failure Signs Guide
Designed specifically for models like the WRX and STI, this small canister ensures that oil remains within the lubrication system, preventing it from contaminating the intercooler and air intake. It is crucial to use high-quality hoses and clamps, as the system operates under vacuum and heat.
It is typically mounted between the valve cover and the intake manifold, requiring the removal of several components to access the mounting point. This upgrade is particularly beneficial for vehicles subjected to heavy boost pressure or frequent track days.
Recognizing WRX Air Oil Separator Failure Symptoms
Inside the device, a series of baffles and filters allow the gases to slow down, condense the oil droplets, and trap them in a media. A clogged separator creates a blockage that restricts crankcase ventilation, leading to increased internal pressure.
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