So after reading a few threads and watching several useless YouTube videos I decided to tackle the thermostat on my 06 ZX3 with a 2.0 Duratec. Here's what I did: On a cold car. Disconnect battery. Remove grill. Remove passenger side(USA) headlight. Place pan under thermostat. Remove cap from overflow tank. Using a ratchet with a 5 inch long 1/4 " extension and a 8mm socket loosen completely but do not remove the 3 8mm bolts. Standing at the passenger side fender, with your right hand,gently pull the thermostat housing away from the engine until you can reach down with your left hand and remove the bolts. Pull thermostat with hoses out until you can pivot the assembly towards the headlight opening. Remove clamps and slide back on the hoses. Note where the witness mark on the hoses are oriented on the thermostat. Mark if missing. Pull hoses off. I used a seal tool to loosen up the hoses a little before they would slide off. Place hoses on new thermostat. Do not clamp. Insert thermostat into block. Check hoses for pinching. If everything is ok pull everything back out and reinstall the hose clamps. Place the thermostat back into position. Move to the passenger side front fender. Gently pull housing back with your right hand and place the 3 bolts in the housing with your left hand. Ease the housing back into the block. I was able to use the extension and socket only to start each bolt a few threads while holding the lower hose at the top to line everything up. Tighten the 3 bolts to 89 inch pounds. Fill overflow tank and start engine. Add coolant to full line. If nothing is leaking reinstall headlight and grill. I did everything without jacking up the car. Headlight has 3 bolts. 2 on top, 1 inside the fender. I was able to reach inside from behind the headlight to access this bolt. I used a Duralast 51280 thermostat with no sensor. Ford only sells the thermostat with the sensor. At least that's what I was told by the parts guy when we searched by VIN#. The Duralst has a bleeder valve. Whole job took 35 minutes start to finish.