overheat

[ryunosuke]

Hey guy so i think i have the probelm narrowed downto my coolant is coming out of my Radiator Air Drain Valve but dont understand why this is happening ,does this mean that i need a new radiator or just a new radiato air drain plug it pretty werid i was sitting at gas station and it just stared pouring of that valve someone please give me a head up.

[MR2Jedi]

1st make sure it's tight.If it still leaks then you might wanna replace it. I think there's a rubber washer on it too. Check that also. Make sure you evacuate all the air from coolant system or it will have heating issues.

[ryunosuke]

Hey guy so i think i have the probelm narrowed downto my coolant is coming out of my Radiator Air Drain Valve but dont understand why this is happening ,does this mean that i need a new radiator or just a new radiato air drain plug it pretty werid i was sitting at gas station and it just stared pouring of that valve someone please give me a head up.



OKae now im stomped so I changed the thermostat ,water pump, coolant flush,check hoses,put on short ram chrome intake, oil change to synthtic, new radiator drain plug,but im still overheating i just dont know wat to do i need a expert really really really bad please please please help me

[MR2Jedi]

Are you sure you have evacuated ALL the air from the system? That can lead to over heating. There's alot of piping in our cars and it's time consuming to get all the air out. Did you evecuate the air from the heater core via the white valve in the frunk? That part is many times over looked..

[ryunosuke]

valve in the trunk ???

[MR2Jedi]

We call the front compartment a (where spare tire and battery are) the "Frunk". Remove plastic shield and in the center the is a big white screw. That will release any air in your heater core. Do it with the engine running and close it when coolant comes thru the relief hose. That will bleed that part of the system.

[PhilVia]

Originally Posted by MR2BAD

We call the front compartment a (where spare tire and battery are) the "Frunk". Remove plastic shield and in the center the is a big white screw. That will release any air in your heater core. Do it with the engine running and close it when coolant comes thru the relief hose. That will bleed that part of the system.

I love this forum
Hello to all MR2BAD been reading alot of your post and learned alot thank you!
I also want to know because I'm having the same issue...how many place do we bleed the system to remove air?
The only place I found is the front driver side radiator after removing the plastic cover.
I have done everything ryunosuke did plus just purchased a oem radiator because I can't find any after market one...very wierd Koyo doesn't make one but then again the oem is full metal.

Thanks guys

[PhilVia]

want to add I just purchased a 91 MR2 Turbo from a good friend but we both did not know the true issue of the car he had it for two weeks and I never drove it yet till this is fix. The wierd thing is it overheat meaning the reservor boils and my temp gauge is normal.
So my last thing I have not replace "NEW" yet is the radiator which I will be getting in soon

[TheEngineer]

There are 2 places in which there is a valve to releive the air from the system. As you can imagine they are in the highest points of the system. One is the radiator and the other is in the frunk as he explained in this thread. Its in the back of the bay toward the cockpit. Here is a diagram of the system


Also the manual says to open each valve 3 full turns for relieving the air

[PhilVia]

Nice ... thank you for that answer btw read what i posted up on my old forum place I used to have a matrix

I thought you might be interested in reading this web page: http://matrixowners.com/index.php?showtopic=74257
From,
PhilDaMatrix

[PhilVia]

thank you thank you
now is it normal for the temp gauge to be in the normal point (middle) and still the the rear is boiling hot?

Originally Posted by TheEngineer

There are 2 places in which there is a valve to releive the air from the system. As you can imagine they are in the highest points of the system. One is the radiator and the other is in the frunk as he explained in this thread. Its in the back of the bay toward the cockpit. Here is a diagram of the system


Also the manual says to open each valve 3 full turns for relieving the air

[MR2Jedi]

Originally Posted by PhilVia

thank you thank you
now is it normal for the temp gauge to be in the normal point (middle) and still the the rear is boiling hot?

Is it actually hot-spewing coolant,hissing? or are you just hearing a boiling sound?
The boiling sound is normal.

[NovaStorm]

Here is a great write up with photo's for bleeding the system.
http://www.lovehorsepower.com/MR2_Do...ing_system.htm
Cheers ~