it has a new thermostat, just put it in about three weeks ago. I put it in then because I noticed the thermostat housing bolt was missing/broken, so I replaced it since I was working on that anyways. I'll check the codes here in a little bit. I have no warning lights that indicate any issues, just that the temp gets high at constant high speed over 20 minutes or so.

Iuno im prolly just getting tired long day at work... haha... no but seriously long day.

just checked the error codes and I have no errors.

And yes, it has the OEM heat shield around the turbo.

Air in your System
 

If it started after you changed your thermostat I would think you have air in your cooling system. Time to Burp it.

agreed with batmmannn

its manditory that after flush, keep rad cap off and idle car until at operation temp and even keep going for another 15-20 mins.
this should remove air in the system.

think the term would be vapor lock. my buddie just did that to his truck but aparently he ruined his heater core, and still has not fixed his overheating problem.

Sounds good guys, I'll try that today when I get home from work. I did push it this morning on the way to work and the temp gauge never moved from its normal operating temp reading....????

Burping
 

When you do it park it facing up a hill. This gets the heater core lower than the radiator cap. Rev is to 3K a few times while clearing out the air. Like he said about 15 to 20 minutes with the rad cap off.

If this does not fix the problem, remove your thermostat and cut the dangle and drill a 4mm hole where the dangle was. Mine didn't clkear all the air till I drilled my thermostat.

yea I heard someone suggest drilling a hole in the thermo.. still dosn't sit right with me.

besides i think the waterfall sound is COOL!