I am going tochange the thermostat on my 91 EX and it is not in the normal place. Are these in the bottom radiator hose at the radiator like the old civics.If anyone has changed the thermo on a 91 EX 2 dr please let me know where it is and the best way to change. Thanks, BW

 

i dont understand, there is no where else to put the thermostat except for where the top hose connects to the motor. it is possible that there just isnt one in there at all (from a previous owner), but it still goes in there. you have a f22a motor

 

Sure there is, where the bottom radiator hose connects to the engine. That's where honda has put them for many years.

 

The thermostat is connected to the lower radiator hose, but from the diagram it looks like the lower rad hose is infront of the engine (opposite side of the spark plug wires). The picture is bad though.

 

starting in 1990.. honda moved the t-stat housing and of course the t-stat,, at the end of the lower radiator hose ( engine side ) ,, up to 1989 t-stat housing used to be at the end of top radiator hose ( engine side)

Bwaymire......it will be a lot easier to remove the air intake tube , it will give you a lot more room to replace the t-stat, remove the clamp for the lower radiator hose, remove the 2 10mm bolts for the outer part of the t-stat housing, replace the t-stat, reinstall in reverse order,,
I would reccomend that you use a Honda t-stat, it comes with a new gasket,,,
Once t-stat is installed, loosen the cooling system bleeder screrw 12 mm ,, on top of t-stat housing, do not totally remove it , remove radiator cap, add coolant 50/50 mix .
fill radiator till only coolant comes out of bleeder screw no air bubbles, tighten the bleeder screw, top off the radiator, install cap, start car and chk to make sure there are no leaks ...........Let car get warm .. lower hose should start to feel hot but not as hot as top hose ,, if so it is an indication that t-stat is opening up properly ,,