New motor is about a year old; but everything else was cleaned while it was out. I had a picture of me in there with a tooth brush while it was out. Kinda funny looking! Total miles on the new engine are about 3k now, but it still gets a regular wash and dressing everytime I wash the car. I just took that picture before going to the track this friday... Clean engine = .05hp! @-
Your question was "how do I clean my valve cover", well....if you need it to look like new (since there is no paint on the cover) use the intake cleaner. I have used it personally and had removed ALL baked on dirt. If you are afraid of doing it, and it seems that people are, try it on another valve cover or a part of your valve cover. I can safely guarantee it will turn out VERY clean.
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