I just pulled my stock 192,,,,And put in a 170,,,,But my temp gauge stays in the middle like the 192 did,,,,,on my last truck when I changed my stat the gauge droped to half way between cold and the middle...Does anyone have any ideas why this new truck is doing this??? Thanks


2004 F150 5.4 3v

 

The temp guage is not accurate, its more of a idiot light. The truck was designed to run at the stock temp, changing the thermo is not such a great idea.

 

the temperature on the thermostat is the opening temperature. on a hot day the thermostat is usually wide open, so regardless of the tstat opening temperature engine temperature will be a function of the cooling systems ability to exchange heat.

 

Thats what I thought,,,,I just wanted to hear it from someone else,,I bet I'll see the change in the winter.

 

I doubt you will ever see it. According to the temp gauge on my Evo II, the stock gauge stays in the same place from about 165 to 220 degrees (probably even higher, but that was as hot as I got the truck).

 

Ok Thanks

 

You're doing more harm then good by using a lower temperature t-stat.Lets start with excessive carbon build up.....i'm sure that excites ya,huh? Then,lets see if the cats will get up to the proper temperature...Ford cats are very expensive........got about $1000-$1200 laying around to replace them when they melt down?

 

They put a 195 stat in for a reason. I would stay with that.

 

I've heard that the lowest to get a stat to open would be 180 and you'll be fine. Lower results in operating in a closed loop like having the choke on. All in all, it's not at all necessary, basically a waste of time. Below this is problems usually and having it open at 192 is not that far away.

 

I put the stock 192 back in, for now, I'm going to get the XCalibrator2 from Troyer soon, and I'll ask them what they recomend when using their tuner. Thank You to all who replyed to this thread.

 

Your truck was designed to work right with a 192 stat, this stat regulates engine running temp (opening when too hot and closing when too cold) The radiator "dumps" the excess heat. Your change will effect engine running, fuel use (cpu will think the engine is in the warming up cycle), loss of power, clogging up stuff and for the winter a crap heater. To name a few things.