So, my thermostat on EA82T with MPFI was gone and I replaced it with a new one. So far so good, but - ugly enough - I broke the housing when I screw everything back together. So I need a new housing, but my local dealer and Subaru Germany are unable to deliver this thing in the near future

But I need that car for daily driving and I don't have an alternative ready to drive with. So I have to tinker something which will work for a few kilometers! I have the thermostat housing of an older EA82 with carburator but there are two hose connectors and that sensor missing. I assume that the sensor wouldn't be so important and I could live without it for some short time. But the two hoses seem to be a problem: The first one goes from the back of the housing to the top of the engine where the air goes in. And the other one goes from the right side to the engine (I don't know how this part of the engine is called in english).

I have the service manual but I really don't find the information there what this two hoses are good for. They seem to bypass the thermostat which I really don't understand

Could anyone please explain the usage of this two hoses?

 

I have the idea to install that simple EA82 housing and then insert a T-part (or "tee part"?) in the hose from the housing to the radiator and connect that two houses to this T-part. I think that should work at least for a week or so. The temperature here in Germany is at -10 to 0°C at the moment so it's cold outside and there should be no cooling problems...

 

Has anyone a better idea or could tell me that this will work. Please help, I need that car running on monday! Thanks!

the thermostat housing will work, but the part with the hoses coming out of it is called the auxilury air valve, also known as an idle air control valve. that is what lets the car idle at a stop when your foot isnt on the gas and also controls the high idle when you start the car.

 

im going to a salvage yard today, ill see if they have any left on the old subies there.

Oh yeah! I just deinstalled this housing completly and I realized that this two houses and that valve (I formerly thought this was some kind of temp sensor) have nothing to do with the cooling circuit.

 

I don't understand why they create a whole new housing instead of simply attach that valve to the old-style EA82 housing or place it anywhere else... To put two things in such way solidly together which don't need to be to together at all is some kind of crazy! Or is there some cause why this is build in that way?

 

Anyway, I have now installed the EA82 housing and put that original housing in there, too to have that air controlled properly. That should work for now...

 

Thanks!!

i think the reason for having both parts together was that the air valve has a coil the until its heated up, its hold the vavle open, thuss giving te car a high idle until it warms up.

Hm, I tinker everything together yesterday - the broken EA82T housing with the valve now lies above the 4 air hoses and is fixed with some wire - and made a test drive: Everything works fine now, the car idles at just below 1000 UpM when it's warmed up - seems OK to me.

good deal man, glad to see that you got it working.