Olas

Specs: 1987 22re

Just rebuilt the motor and while filling it with coolant, I noticed it started pouring into the intake through the hose that comes from the front side of the IACV (manual calls it the auxilary air valve). I'm wondering if there is a diaphragm that could have gone bad? Looks like the back side of this valve has two hoses going into it and the front side has the hose that runs up to the intake, which is the one causing the problem.

Here's some pics, and would replacement of this valve solve this issue or is this due to something being hooked up wrong?

Thanks in advanced.





This is the "auxiliary air valve"

Olas

No one? I'm thinking that since the truck sat for the last two months with no fluids going through it maybe a valve got stuck open inside this auxiliary air valve....If anyone has suggestions, please advise. I'm going to take it off and inspect it.

RustBucket

iTrader: (1)

The two side tubes are for coolant, the one coming out of the front is for air. Does that help any... ? You could probably bypass it as well and be fine.

bmrtoyo

theres supposedly a diaphragm in there ,, i cant find gasket or diaphragm ,FSM is worthless on this topic ,,says replace { this the same guy who wrote Chilton manual } lol anyone got any resources ????

854x4

The two hoses on the side are coolant hoses that run through the IAC valve so it can sense temperature and respond accordingly which means moving a valve that allows more or less airflow between the hose in front to the throttle body and the hose in back that should go to the plenum. One of two things happen. First you either have a bad IACV or there is a 1/2 U shaped hose that goes from the bottom of the intake to a pipe bolted to the back of the timing cover, if this hose is hooked to the back of the IACV it would explain why there is coolant in the front hose. Remember the two small hoses on the side are for coolant and the two bigger hoses front and back are for air/vacuum.

bmrtoyo

ok thanks not doubting you ,,, appreciate youre input !!,, i havent messed with this until now not doubting you ,,i called 2 yota dealerships here and they said they dont even list this anymore so now im at that fun hurdle

wyoming9

iTrader: (1)

After all this time since these valves were new I have yet to have one that works they either cause a vacuum leak or leak coolant.

I have removed all mine looped the coolant line plugged the air line.

Last I looked these were very expensive to replace .