Just took apart my oil pump and the screws holding the cover were really hard to get off, in fact I destroyed one in the process. I'm gonna replace all the screws with new ones and was wondering if it'd be a good idea to put lock tight on the new ones. Thanks

 

Yep!

http://www.d-lander.com/manuals/35_3...8_overhaul.pdf

ETA: I destroyed one of mine, too. I had to use a Phillips head on a ratchet to get them off without stripping the heads.