How To Remove or Replace Plastic Engine Cover ClipsRemoving is very simple...
Using a Philips screwdriver, press the center of the clip down. Now pull the entire out by it's base.
Install is also quite simple...
Before inserting the clip, push the center cylinder up. Now place the clip in to the socket, so that its base is flush. Press the center cylinder down so it is flush with the base.
How To Remove The Other Types of Plastic Clips: Interior Upholstery, Covers, Undercarriage...etc