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I JUST PURCHASED A HYPERTECH III, AND PLAN ON CHANGING THE STAT THIS WEEKEN ON MY '99 AT4 Z51 3.15. I TOOK A GLANCE LAST NIGHT TO FIND THE STAT BY JUST FOLLOWING THE RADIATOR HOSE AND MUCH TO MY SURPRISE I COULDN'T SEE IT......CAN SOMEBODY HELP ME....WHERE THE HECK IS THE STAT???? :confused:
Follow the hose from the bottom of the radiator on the passenger side up to the front of the block.....it connects to the T-Stat....it is halfway down on the passenger side of the block. The T-stat makes almost a 90 degree turn towards the passenger side of the car and connects to the hose.
Here's how I changed mine out. I got the car hot, and pulled it onto Rhino ramps. I got a large container to catch all the fluid, and using the pitcock on the lower passenger side of the radiator I drained as much fluid as would come out. I used vice grips to open the pitcock, being careful not to get any hot fluid on me. The reason I did this with the car hot is so the T-stat would be open and drain as much fluid from the block and hose as possible. Once all the fluid had drained, I then disconnected the hose and replaced the T-stat. Some fluid will come out when you do this, but it won't be a whole lot. Hope this helps...