PhantomEJ8

I got a 1998 EX coupe, im running a D16y8 with a Jackson Racing Super Charger.
I just started to notice that after driving for about 20 minutes my temp gauge starts to reach the H zone.
at times it cools off a few lines just below the H.. but then goes up again.. if i boost.. it def reaches the H.

Ive checked the top and bottom radiator hoses and there hot so i know there circulating coolant.
and ive been told it can be the Thermostat. or the thermostat temp sensor..
with whats been going on does anyone have any suggestions on other things it might be?

Also, if you guys think it could just be the Thermostat, would anyone happen to have a thread or a link to a "how to" on Installing a thermostat, ive been told its pretty easy and like 2-3 bolts and ive located it.. but i would feel alot better follow and using instructions.. do it right the 1st time..

Thanks guys for any help you might have.

E46Kid

Does your water resevoir boil? check under your oil cap see if its milky, might be a blown head gasket, also check the radiator cap make sure the seal isnt cracked, and if it is the thermostat should be an easy fix just search im pretty sure you can find 1.