I just did my t-stat on the 6 this afternoon. I removed the two clips and one plug in on the fan assy. and removed it. Then I use my inverted torx E10 to loosen the tensioner and remove the serpentine belt from the idler pulley near the t-stat. I then removed the idler pulley by unbolting the 16mm bolt. Then you have clear access to the two E10 bolts on the thermostat.