When I took off the oil pan and other intrenal parts most the bolts had loctitie on them. Some had yellow, some orange, some red loctite. Why the different colors? I have only seen blue and red. Do I need to match theses colors when I put the motor backl togther? Or can I just use some of the blue stuff I already have.? And my other question is, how do I get allt he old loctitie out holes and threads so I can redo it without any old stuff in there?