Oil from AOS in Exhaust

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Oil from AOS in Exhaust

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05-05-2020, 12:36 PM

JFP in PA

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Join Date: Feb 2005

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Quote:

Originally Posted by 78F350

I'm replacing a bad AOS and there is some oil dripping from the exhaust. Is there any concern about cleaning/flushing the O2 sensors or cat's, or is it best to just run the car after replacing the AOS and let the oil just burn off?

I wouldn't be worried about the sensors, oil is murder on the cats, which are way more expensive. Fill the car up with fuel and take a long ride at steady cruise speeds (50-60 MPH); this will get the cats hot and keep them that way. If the oil burns off, your golden, it the cats start coding, you are about to spend some $.

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