Over Tightened Screws

Hey guys,

I had a service guy come recently to replace my heatsink and afterwards i noticed that there's a little foam piece under the heatsink that's bending the metal sheets on the edges.

So I decided to take the M11x apart to see what was going on (as my laptop was getting hot again ie before heatsink replacement was about 90-100 gaming then afterwards was about 70 gaming and now it's getting back up to 80 ish gaming)

Now as I'm taking it apart I'm running into all these screws that are so tight I can't unscrew them and some are getting stripped.

I'm going to go pick up some screw extractors to get them out but before I go I'll just post this up to hopefully get some answers.

1) If the screws are too tight it's a bad thing and I should re-screw them in right?
2) How do I go about asking/will Dell replace my stripped screws if I call in and ask them for screws?
3) If the heatsink is screwed on too tight also would that be a cause for high temps? (like the tightness causes the thermal compound to be squished out between the heatsink and processors causing them to have metal on metal contact)

thanks

 

i cant say about the first 2, but on the third metal to metal contact is actually the best way to transfer heat, however due to heatsinks and the processor die not being 100% flat thermal paste is used to " fill the gaps ", i always think less is more when it comes to paste as too thick a layer can be just as bad..

 

hmm thanks for the response. funny cuz the dell tech told me pretty much the opposite :\
I asked him why dell thought switching the heat sink would help my overheating issue, as the heat sink physically appeared fine and the fan was working properly. He responded by showing me that there was basically no thermal paste between my heat sink and processors and this metal on metal contact caused them to over heat.
Now that I think about it if there were the case I'm confused as to why dell sent a new heat sink just to replace thermal paste :\
Anyways I'm getting new thermal paste tomorrow and seeing if applying that will solve my heating issues. If not then I may need to call in again to replace my mobo.