Ok guys I've searched and searched till I'm sick. I'm trying to figure out what the stock t-stat is in the 05-09 mustang gt...with out pulling mine out. I've read it's 180, 192, 195, 210? So what the heck is it? I'm trying to set my low and high fan speed fan to cool the engine the best. Right now I have it at low speed 200 and high 210. I can't find a solid answer anywhere about the stock t-stat temp. Any info I'd really apperciate. Thanks

 

Call Brenspeed...they sell the Hypertech 160 degree that I put in my GT...

 

190 is OEM.

180 is normally the replacement recommended by aftermarket.

160..way too cold IMO.

Goto FoMoCo parts look up and then find the specifications (temp) by googling the part number RT-1196 and RT-1168. 190....

 

Thanks guy

 

OEM read actually as 192 (stamped on top of it) from the one I pulled out of my own. Put in a 170 a few weeks ago. Should have done that a long time ago. Have a 160, but yeah, if not SC/FI, that's likely too much from what I was reading, so I thought 170 was a good compromise and have been using that, I'll see how that plays out in November-March. Just that brought me down to 189 normal operating temp from 201.

 

well I do only drive it in warm weather...

 

Wayne, does it feel any different?

 

It doesn't feel like I'm losing anything once it's fully warmed up anymore. I'm sure this won't be great for the overall longevity of the pump, gasket and the like, but well worth it.

I just got a hose clamp while at harbor freight the last time, so took about 30 min to do total since I didn't have to drain it.

 

I need to change my thermostat. Is this a difficult procedure? IE: Drain, remove several parts, hoses etc? Time frame?

 

Not hard, I think the procedure has you drain it. You can get pinch-off pliers for about $15 though, or just use something "like" that such 2 pieces of moulding and vise grip pliers. Just have to:
1) pull TB and intake
2) pinch off the hose going into thermostat housing(about 2 inches or so from)
3) release accessory drive/serpentine belt from the belt tensioner(tensioner release tool is like $15-$18), small steel bar goes into 3/8' notch in tensioner, larger bar goes into the other end to act as a fulcrum
4) good pair of pliers to release the hose clamp tieing it to the housing
5) then yank the alternator to get to the second thermostat housing bolt.
6) pull thermostat housing, pry old thermostat out.
7) put new thermostat in with new o-ring.

You'll get a little bit of coolant on the car no matter which route you take. Probably about 40mins depending start to finish. Was about 25 for me, but I had everything on hand, and had just gone through replacing my alternator and redoing the main wiring and grounds with 0gauge.

http://iihs.net/fsm/?dir=182&viewfil...ded%20View.pdf (page 2)

http://iihs.net/fsm/?dir=182&viewfile=Coolant%20Pump%20-%204.6L%20(3V).pdf