87 STANG

I am going to change out my thermostat. The motorcraft calls for 192 degree, but i was wondering what will happen if i go who a 180 degree. I'm going to do alot of rush hour traffic driving for the next couple months. So i wanted to see about keeping my car a little cooler, cause i have seen alot of cars overheat in the summertime especially from just sitting in traffic.

Dirty Sanchez

No, it won't throw a code. You'll be fine with a 180.

vristang

I have to ask if you know what the current coolant temp is though. Making changes without knowing where you are starting from can be a little sketchy. How do you know the 180F stat is the best choice?
Most likely it is, I just wanted to make the point.

You won't get any codes with the 180, and probably wouldn't with the 160 stat either.

Ideal coolant temps are around 185-205F. The higher in the range the better, but you obviously don't want any spikes in temp while in traffic or running wot.

jason

87 STANG

My car runs a little higher than half with the stock thermo which is 192

87 STANG

So besides throwing a code willit effect my car at WOT or effect at all or do any harm to the motor

vristang

Assuming the stock gauge is accurate (it is not good to make this assumption though, stock gauges are junk), you would be better off with a 180F stat.
It does not really matter what rating the stat is. The important thing is what your coolant temps are. If steady temps are over 210F, then it is time to make changes because wot or stop and go A/C driving can push you over the limit.

How is the rest of the system?
When was the last time you flushed the cooling system? Deposits in the coolant passages/radiator can cause poor cooling efficiency.

You will not see any trouble codes.
Unless the coolant temps get below 170-180F there is no need to worry about engine wear. The 180F stat will likely put your coolant temps in the mid 190s.

Good Luck,
jason