What are the Causes Behind Air/Oil Separator Failure in Porsches?
The brand Porsche comes imbued with characteristic German capability, speed, sophisticated engineering and flashy looks.
But even a Porsche can face the same sorts of maintenance and technical failures faced by a normal family car.
A common problem with Porsche cars having turbocharged engines is the failure of the air/oil separator.
What is the air/oil separator in a Porsche?
The air-oil separator is an emission device that is placed in the back corner of the Porsche engine.
Its primary function is to collect lingering gas and vapor remaining in the crankcase and direct them back into the intake manifold.
The main job of the air-oil separator is to reduce emissions for the car by burning those gases in the regular combustion chamber.
What happens when it fails?
A failed air-oil separator cannot separate the oil from the “air� that it is sucking back to the combustion.
The presence of oil in the intake manifold is not good for the engine as it may interfere with spark plugs and catalytic converters.
What are the warning signs?
One of the most common indicators of a faulty air/oil separator is a large quantity of white smoke pouring out of the engine area.
The check engine light gets “ON� as the oil being drawn into the engine reduces the normal levels.
The oil cap can become very difficult to remove due to the high vacuum levels of the engine.
The engine starts to make a high-pitched squealing sound as air is being drawn through the crankcase seal.
Other indicating possibilities include oil leaks and dark smoke coming from the exhaust pipe.
How can you fix or avoid it?
The best way to avoid such problems in a Porsche is to consistently and regularly follow the maintenance schedule proposed by the manufacturer.
This information should be readily available in the owner’s manual and also follow-up questions should be asked to a Porsche dealer or your mechanic.
However, it’s possible to do a little self-diagnosis like: -Measure the engine crankcase vacuum with a slack tube manometer or a vacuum gauge by making a hole in the top of an old filler cap. -The normal pressure ranges between 4 to 7 inches of water and if the air/oil separator has failed, it will be between 9 to 12 inches.
And if you are not sure about the diagnosis, then consult a mechanic to access the problem.
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