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Summary: The red gasket on an oil filter should be seated firmly on the housing. Learn what an oil filter is from a professional mechanic in this free maintenance video.
Jeffery Fiffie has 10 years of auto mechanic and management experience. He is able to do brake repair and tune-ups, including engine analysis, fuel injection, steering and suspension...read more
"Hello, my name is Jeff Fiffie. I'll be showing you how to perform basic field maintenance on your car. We're going to talk about your oil filter now. This is actually your oil filter here. Taking it out of the box, this is what it looks like. It's very important that the red gasket that you see here is seated firmly within the housing. This stops any oil from escaping outside of the gasket and causing oil leakage. The function of this oil filter is, what we talked about earlier, picks up and captures any contaminate that may be in your oil that risk of scarring engine parts. To remove this filter off of the housing, you will need an oil filter wrench. One way that I remember is, "Lefty loosey; Righty tighty.""
eHow Article: Oil Filter Tips