please school me on thermostats

[JackstandJohnny]

so when it was nice out last week, YJ was running at the right temp.  195 degrees or so.  but; the upper rad hose was bad; so i replaced it today, and now the jeep won't get past the first tick on the temp; gauge.  i cannot get it to warm up for the life of me... i grabbed the upper rad hose, and its empty;

any ideas why my jeep won't get to operating temp?  i would usually say the tstat is open; but woulnd't there be fluid in the upper rad hose?

cheers

[Tinkerer]

I would expect the system to be completely full, so thermostat open or closed, the upper hose should be full of coolant. Sounds like a major case of air in the system.

[.:.Dingman.:.]

so when it was nice out last week, YJ was running at the right temp.  195 degrees or so.  but; the upper rad hose was bad; so i replaced it today, and now the jeep won't get past the first tick on the temp; gauge.  i cannot get it to warm up for the life of me... i grabbed the upper rad hose, and its empty;

any ideas why my jeep won't get to operating temp?  i would usually say the tstat is open; but woulnd't there be fluid in the upper rad hose?

cheers

x2 John

open the heater all the way park with the rad facing uphill and let all the air out.



Dingman