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Old 05-05-2020, 12:36 PM   #2
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,614
Quote:
Originally Posted by 78F350 View Post
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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