Tri-z thermostat housing seized.

[Just-Tri-It]

I took the housing off the bike to replace the thermostat. After removing the 2 screw bolts, the two parts don't want to separate after years of use. What is the best way to separate the two pieces without damaging it or breaking it?
Thanks

[christph]

Get a razor blade, place it on the seam between the parts that need separating, and lightly tap the razor on the back with a hammer or mallet. I haven't taken mine apart in a while but I don't see a reason why it should resist too much. I use this technique when I don't want to mare the mating surfaces.

[devilman]

replace it with a t-stat eliminator from the 3ww shop.