I am in the process of replacing my glow plugs. I have removed everything that needed to be taken out, and am now looking at the six glow plugs, with these little black caps attached to each one. How do you get the little buggers off the glow plugs? I have read one of the diy guides on the forum, and it mentions using a long nose pliers to gently squeeze the sides of the cap to remove it from the glow plug. I have tried this, but its a no go. Any help would be greatly appreciated......thank you